Author: "Kerzenmacher, T" - Searchworks@Jio Institute Digital Library Search Results

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121 results on '"Kerzenmacher, T"'

1. Evaluation of the Quasi‐Biennial Oscillation in global climate models for the SPARC QBO‐initiative

Author: Bushell, A. C., primary, Anstey, J. A., additional, Butchart, N., additional, Kawatani, Y., additional, Osprey, S. M., additional, Richter, J. H., additional, Serva, F., additional, Braesicke, P., additional, Cagnazzo, C., additional, Chen, C.‐C., additional, Chun, H.‐Y., additional, Garcia, R. R., additional, Gray, L. J., additional, Hamilton, K., additional, Kerzenmacher, T., additional, Kim, Y.‐H., additional, Lott, F., additional, McLandress, C., additional, Naoe, H., additional, Scinocca, J., additional, Smith, A. K., additional, Stockdale, T. N., additional, Versick, S., additional, Watanabe, S., additional, Yoshida, K., additional, and Yukimoto, S., additional
Published: 2020
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2. Evaluation of the Quasi‐Biennial Oscillation in global climate models for the SPARC QBO‐initiative.

Author: Bushell, A. C., Anstey, J. A., Butchart, N., Kawatani, Y., Osprey, S. M., Richter, J. H., Serva, F., Braesicke, P., Cagnazzo, C., Chen, C.‐C., Chun, H.‐Y., Garcia, R. R., Gray, L. J., Hamilton, K., Kerzenmacher, T., Kim, Y.‐H., Lott, F., McLandress, C., Naoe, H., and Scinocca, J.
Subjects: QUASI-biennial oscillation (Meteorology), ATMOSPHERIC models, GENERAL circulation model, OCEAN temperature, GRAVITY waves, OSCILLATIONS
Abstract: Quasi‐biennial oscillations (QBOs) in thirteen atmospheric general circulation models forced with both observed and annually repeating sea surface temperatures (SSTs) are evaluated. In most models the QBO period is close to, but shorter than, the observed period of 28 months. Amplitudes are within ±20% of the observed QBO amplitude at 10 hPa, but typically about half of that observed at lower altitudes (50 and 70 hPa). For almost all models, the oscillation's amplitude profile shows an overall upward shift compared to reanalysis and its meridional extent is too narrow. Asymmetry in the duration of eastward and westward phases is reasonably well captured, though not all models replicate the observed slowing of the descending westward shear. Westward phases are generally too weak, and most models have an eastward time mean wind bias throughout the depth of the QBO. The intercycle period variability is realistic and in some models is enhanced in the experiment with observed SSTs compared to the experiment with repeated annual cycle SSTs. Mean periods are also sensitive to this difference between SSTs, but only when parametrized non‐orographic gravity wave (NOGW) sources are coupled to tropospheric parameters and not prescribed with a fixed value. Overall, however, modelled QBOs are very similar whether or not the prescribed SSTs vary interannually. A portrait of the overall ensemble performance is provided by a normalized grading of QBO metrics. To simulate a QBO, all but one model used parametrized NOGWs, which provided the majority of the total wave forcing at altitudes above 70 hPa in most models. Hence the representation of NOGWs either explicitly or through parametrization is still a major uncertainty underlying QBO simulation in these present‐day experiments. [ABSTRACT FROM AUTHOR]
Published: 2022
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3. The equatorial stratospheric semiannual oscillation and time‐mean winds in QBOi models.

Author: Smith, A. K., Holt, L. A., Garcia, R. R., Anstey, J. A., Serva, F., Butchart, N., Osprey, S., Bushell, A. C., Kawatani, Y., Kim, Y.‐H., Lott, F., Braesicke, P., Cagnazzo, C., Chen, C.‐C., Chun, H.‐Y., Gray, L., Kerzenmacher, T., Naoe, H., Richter, J., and Versick, S.
Subjects: QUASI-biennial oscillation (Meteorology), ZONAL winds, OCEAN waves, ATMOSPHERIC models, OSCILLATIONS, GRAVITY waves
Abstract: The Quasi‐Biennial Oscillation initiative (QBOi) is a model intercomparison programme that specifically targets simulation of the QBO in current global climate models. Eleven of the models or model versions that participated in a QBOi intercomparison study have upper boundaries in or above the mesosphere and therefore simulate the region where the stratopause semiannual oscillation (SAO) is the dominant mode of variability of zonal winds in the tropical upper stratosphere. Comparisons of the SAO simulations in these models are presented here. These show that the model simulations of the amplitudes and phases of the SAO in zonal‐mean zonal wind near the stratopause agree well with the information derived from available observations. However, most of the models simulate time‐average zonal winds that are more westward than determined from observations, in some cases by several tens of m·s–1. Validation of wave activity in the models is hampered by the limited observations of tropical waves in the upper stratosphere but suggests a deficit of eastward forcing either by large‐scale waves, such as Kelvin waves, or by gravity waves. [ABSTRACT FROM AUTHOR]
Published: 2022
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4. The equatorial stratospheric semiannual oscillation and time‐mean winds in QBOi models

Author: Smith, A. K., primary, Holt, L. A., additional, Garcia, R. R., additional, Anstey, J. A., additional, Serva, F., additional, Butchart, N., additional, Osprey, S., additional, Bushell, A. C., additional, Kawatani, Y., additional, Kim, Y.‐H., additional, Lott, F., additional, Braesicke, P., additional, Cagnazzo, C., additional, Chen, C.‐C., additional, Chun, H.‐Y., additional, Gray, L., additional, Kerzenmacher, T., additional, Naoe, H., additional, Richter, J., additional, Versick, S., additional, Schenzinger, V., additional, Watanabe, S., additional, and Yoshida, K., additional
Published: 2020
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5. Intercomparison of ground-based ozone and NO2 measurements during the MANTRA 2004 campaign

Author: Fraser, A., Bernath, P. F., Blatherwick, R. D., Drummond, J. R., Fogal, P. F., Fu, D., Goutail, F., Kerzenmacher, T. E., McElroy, C. T., Midwinter, C., Olson, J. R., Strong, K., Walker, K. A., Wunch, D., and Young, I. J.
Subjects: lcsh:Chemistry, lcsh:QD1-999, Caltech Library Services, lcsh:Physics, lcsh:QC1-999
Abstract: The MANTRA (Middle Atmosphere Nitrogen TRend Assessment) 2004 campaign took place in Vanscoy, Saskatchewan, Canada (52° N, 107° W) from 3 August to 15 September, 2004. In support of the main balloon launch, a suite of five zenith-sky and direct-Sun-viewing UV-visible ground-based spectrometers was deployed, primarily measuring ozone and NO2 total columns. Three Fourier transform spectrometers (FTSs) that were part of the balloon payload also performed ground-based measurements of several species, including ozone. Ground-based measurements of ozone and NO2 differential slant column densities from the zenith-viewing UV-visible instruments are presented herein. They are found to partially agree within NDACC (Network for the Detection of Atmospheric Composition Change) standards for instruments certified for process studies and satellite validation. Vertical column densities of ozone from the zenith-sky UV-visible instruments, the FTSs, a Brewer spectrophotometer, and ozonesondes are compared, and found to agree within the combined error estimates of the instruments (15%). NO2 vertical column densities from two of the UV-visible instruments are compared, and are also found to agree within combined error (15%).
Published: 2007

6. Validation of ACE-FTS N2O measurements

Author: Strong, K., Wolff, M. A., Kerzenmacher, T. E., Walker, K. A., Bernath, P. F., Blumenstock, T., Boone, C., Catoire, Valéry, Coffey, M., De Mazière, M., Demoulin, P., Duchatelet, P., Dupuy, E., Hannigan, J., Höpfner, M., Glatthor, N., Griffith, D. W. T., Jin, J. J., Jones, N., Jucks, K., Kuellmann, H., Kuttippurath, J., Lambert, A., Mahieu, E., Mcconnell, J. C., Mellqvist, J., Mikuteit, S., Murtagh, D. P., Notholt, J., Piccolo, C., Raspollini, P., Ridolfii, M., Robert, Cédric, Schneider, M., Schrems, O., Semeniuk, K., Senten, C., Stiller, G. P., Strandberg, A., Taylor, James, Tétard, C., Toohey, M., Urban, Jakub, Warneke, T., Wood, S., Department of Physics [Toronto], University of Toronto, Department of Chemistry [Waterloo], University of Waterloo [Waterloo], Department of Chemistry, Forschungszentrum Karlsruhe and University of Karlsruhe, Laboratoire de physique et chimie de l'environnement (LPCE), Université d'Orléans (UO)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), National Center for Atmospheric Research [Boulder] (NCAR), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, School of Chemistry, Department of Earth and Space Science and Engineering [York University - Toronto] (ESSE), York University [Toronto], Harvard-Smithsonian Center for Astrophysics (CfA), Smithsonian Institution-Harvard University [Cambridge], Institute of Environmental Physics [Bremen] (IUP), University of Bremen, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Department of Radio and Space Science [Göteborg], Chalmers University of Technology [Göteborg], Department of Physics, Okayama University, Istituto di Fisica Applicata 'Nello Carrara' (IFAC), Consiglio Nazionale delle Ricerche [Roma] (CNR), Dipartimento di Chimica Fisica e Inorganica [Bologna], Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Department of Bentho-pelagic processes, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), National Institute of Water and Atmospheric Research [Lauder] (NIWA), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Harvard University-Smithsonian Institution, NASA-California Institute of Technology (CALTECH), and National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)
Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
Abstract: International audience; The Atmospheric Chemistry Experiment (ACE), also known as SCISAT, was launched on 12 August 2003, carrying two instruments that measure vertical profiles of atmospheric constituents using the solar occultation technique. One of these instruments, the ACE Fourier Transform Spectrometer (ACE-FTS), is measuring volume mixing ratio (VMR) profiles of nitrous oxide (N2O) from the upper troposphere to the lower mesosphere at a vertical resolution of about 3–4 km. In this study, the quality of the ACE-FTS version 2.2 N2O data is assessed through comparisons with coincident measurements made by other satellite, balloon-borne, aircraft, and ground-based instruments. These consist of vertical profile comparisons with the SMR, MLS, and MIPAS satellite instruments, multiple aircraft flights of ASUR, and single balloon flights of SPIRALE and FIRS-2, and partial column comparisons with a network of ground-based Fourier Transform InfraRed spectrometers (FTIRs). Overall, the quality of the ACE-FTS version 2.2 N2O VMR profiles is good over the entire altitude range from 5 to 60 km. Between 6 and 30 km, the mean absolute differences for the satellite comparisons lie between -42 ppbv and +17 ppbv, with most within ±20 ppbv. This corresponds to relative deviations from the mean that are within ±15%, except for comparisons with MIPAS near 30 km, for which they are as large as 22.5%. Between 18 and 30 km, the mean absolute differences are generally within ±10 ppbv, again excluding the aircraft and balloon comparisons. From 30 to 60 km, the mean absolute differences are within ±4 ppbv, and are mostly between -2 and +1 ppbv. Given the small N2O VMR in this region, the relative deviations from the mean are therefore large at these altitudes, with most suggesting a negative bias in the ACE-FTS data between 30 and 50 km. In the comparisons with the FTIRs, the mean relative differences between the ACE-FTS and FTIR partial columns are within ±6.6% for eleven of the twelve contributing stations. This mean relative difference is negative at ten stations, suggesting a small negative bias in the ACE-FTS partial columns over the altitude regions compared. Excellent correlation (R=0.964) is observed between the ACE-FTS and FTIR partial columns, with a slope of 1.01 and an intercept of -0.20 on the line fitted to the data.
Published: 2008

7. Validation of NO2 and NO from the Atmospheric Chemistry Experiment (ACE)

Author: Kerzenmacher, T., Wolff, M. A., Strong, K., Dupuy, E., Walker, K. A., Amekudzi, L. K., Batchelor, R. L., Bernath, P. F., Berthet, Gwenaël, Blumenstock, T., Boone, C. D., Bramstedt, K., Brogniez, C., Brohede, S., Burrows, J. P., Catoire, Valéry, Dodion, J., Drummond, J. R., Dufour, D. G., Funke, B., Fussen, D., Goutail, Florence, Griffith, D. W. T., Haley, C. S., Hendrick, F., Höpfner, M., Huret, Nathalie, Jones, N., Kar, J., Kramer, I., Llewellyn, E. J., López-Puertas, M., Manney, G., Mcelroy, C. T., Mclinden, C. A., Melo, S., Mikuteit, S., Murtagh, D., Nichitiu, F., Notholt, J., Nowlan, C., Piccolo, C., Pommereau, Jean-Pierre, Randall, C., Raspollini, P., Ridolfi, M., Richter, A., Schneider, M., Schrems, O., Silicani, M., Stiller, G. P., Taylor, James, Tétard, C., Toohey, M., Vanhellemont, F., Warneke, T., Zawodny, J. M., Zou, J., Department of Physics [Toronto], University of Toronto, Department of Chemistry [Waterloo], University of Waterloo [Waterloo], Institut für Umweltphysik [Bremen] (IUP), Universität Bremen, Department of Chemistry [York, UK], University of York [York, UK], Laboratoire de physique et chimie de l'environnement (LPCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Department of Radio and Space Science [Göteborg], Chalmers University of Technology [Göteborg], Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Department of Physics and Atmospheric Science [Halifax], Dalhousie University [Halifax], Picomole Instruments Inc., Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), School of Chemistry [Wollongong], University of Wollongong [Australia], Centre for Research in Earth and Space Science [Toronto] (CRESS), York University [Toronto], Institute of Space and Atmospheric Studies [Saskatoon] (ISAS), Department of Physics and Engineering Physics [Saskatoon], University of Saskatchewan [Saskatoon] (U of S)-University of Saskatchewan [Saskatoon] (U of S), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), New Mexico Institute of Mining and Technology [New Mexico Tech] (NMT), Environment and Climate Change Canada, Canadian Space Agency (CSA), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), University of Oxford, Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], Department of Atmospheric and Oceanic Sciences [Boulder] (ATOC), Istituto di Fisica Applicata 'Nello Carrara' (IFAC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Chimica Fisica e Inorganica [Bologna], Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), NASA Langley Research Center [Hampton] (LaRC), Institut für Umweltphysik [Bremen] ( IUP ), Laboratoire de physique et chimie de l'environnement ( LPCE ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université d'Orléans ( UO ) -Centre National de la Recherche Scientifique ( CNRS ), Institut für Meteorologie und Klimaforschung ( IMK ), Karlsruher Institut für Technologie ( KIT ), Laboratoire d’Optique Atmosphérique - UMR 8518 ( LOA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique ( BIRA-IASB ), Instituto de Astrofísica de Andalucía ( IAA ), Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Service d'aéronomie ( SA ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), University of Wollongong, Centre for Research in Earth and Space Science [Toronto] ( CRESS ), Institute of Space and Atmospheric Studies [Saskatoon] ( ISAS ), University of Saskatchewan [Saskatoon] ( U of S ), Jet Propulsion Laboratory ( JPL ), NASA-California Institute of Technology ( CALTECH ), New Mexico Institute of Mining and Technology [New Mexico Tech] ( NMT ), Canadian Space Agency ( CSA ), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), University of Oxford [Oxford], Laboratory for Atmospheric and Space Physics [Boulder] ( LASP ), University of Colorado Boulder [Boulder], Department of Atmospheric and Oceanic Sciences [Boulder] ( ATOC ), Istituto di Fisica Applicata 'Nello Carrara' ( IFAC ), Consiglio Nazionale delle Ricerche [Roma] ( CNR ), Università di Bologna [Bologna] ( UNIBO ), Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research ( AWI ), NASA Langley Research Center [Hampton] ( LaRC ), Université d'Orléans (UO)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille, Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), California Institute of Technology (CALTECH)-NASA, Consiglio Nazionale delle Ricerche [Roma] (CNR), and Università di Bologna [Bologna] (UNIBO)
Subjects: lcsh:Chemistry, [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, lcsh:QD1-999, lcsh:Physics, lcsh:QC1-999
Abstract: Vertical profiles of NO2 and NO have been obtained from solar occultation measurements by the Atmospheric Chemistry Experiment (ACE), using an infrared Fourier Transform Spectrometer (ACE-FTS) and (for NO2) an ultraviolet-visible-near-infrared spectrometer, MAESTRO (Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation). In this paper, the quality of the ACE-FTS version 2.2 NO2 and NO and the MAESTRO version 1.2 NO2 data are assessed using other solar occultation measurements (HALOE, SAGE II, SAGE III, POAM III, SCIAMACHY), stellar occultation measurements (GOMOS), limb measurements (MIPAS, OSIRIS), nadir measurements (SCIAMACHY), balloon-borne measurements (SPIRALE, SAOZ) and ground-based measurements (UV-VIS, FTIR). Time differences between the comparison measurements were reduced using either a tight coincidence criterion, or where possible, chemical box models. ACE-FTS NO2 and NO and the MAESTRO NO2 are generally consistent with the correlative data. The ACE-FTS and MAESTRO NO2 volume mixing ratio (VMR) profiles agree with the profiles from other satellite data sets to within about 20% between 25 and 40 km, with the exception of MIPAS ESA (for ACE-FTS) and SAGE II (for ACE-FTS (sunrise) and MAESTRO) and suggest a negative bias between 23 and 40 km of about 10%. MAESTRO reports larger VMR values than the ACE-FTS. In comparisons with HALOE, ACE-FTS NO VMRs typically (on average) agree to ±8% from 22 to 64 km and to +10% from 93 to 105 km, with maxima of 21% and 36%, respectively. Partial column comparisons for NO2 show that there is quite good agreement between the ACE instruments and the FTIRs, with a mean difference of +7.3% for ACE-FTS and +12.8% for MAESTRO.
Published: 2008

8. Validation of HNO3, ClONO2, and N2O5 from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

Author: Wolff, M. A., Kerzenmacher, T., Strong, K., Walker, K. A., Toohey, M., Dupuy, E., Bernath, P. F., Boone, C. D., Brohede, S., Catoire, Valéry, Von Clarmann, T., Coffey, M., Daffer, W. H., De Mazière, M., Duchatelet, P., Glatthor, N., Griffith, D. W. T., Hannigan, J., Hase, F., Höpfner, M., Huret, Nathalie, Jones, N., Jucks, K., Kagawa, A., Kasai, Y., Kramer, I., Küllmann, H., Kuttippurath, J., Mahieu, E., Manney, G., Mclinden, C., Mébarki, Y., Mikuteit, S., Murtagh, D., Piccolo, C., Raspollini, P., Ridolfi, M., Ruhnke, R., Santee, M., Senten, C., Smale, D., Tétard, C., Urban, Jakub, Wood, S., Department of Physics [Toronto], University of Toronto, Department of Chemistry [Waterloo], University of Waterloo [Waterloo], Department of Chemistry, Department of Radio and Space Science [Göteborg], Chalmers University of Technology [Göteborg], Laboratoire de physique et chimie de l'environnement ( LPCE ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université d'Orléans ( UO ) -Centre National de la Recherche Scientifique ( CNRS ), Forschungzentrum Karlsruhe and University of Karlsruhe, National Center for Atmospheric Research [Boulder] ( NCAR ), Columbus Technologies Inc., Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique ( BIRA-IASB ), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, School of Chemistry, Harvard-Smithsonian Center for Astrophysics ( CfA ), Harvard University [Cambridge]-Smithsonian Institution, Fujitsu FIP Corporation, Environmental Sensing and Network Group, Institute of Environmental Physics [Bremen] ( IUP ), University of Bremen, Jet Propulsion Laboratory ( JPL ), NASA-California Institute of Technology ( CALTECH ), New Mexico Institute of Mining and Technology [New Mexico Tech] ( NMT ), Environment and Climate Change Canada, Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), University of Oxford [Oxford], Institute of Applied Physics ``Nello Carrara', Dipartimento di Chimica Fisica e Inorganica, National Institute of Water and Atmospheric Research Ltd., Laboratoire d’Optique Atmosphérique - UMR 8518 ( LOA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de physique et chimie de l'environnement (LPCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), National Center for Atmospheric Research [Boulder] (NCAR), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, Institute of Environmental Physics [Bremen] (IUP), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), New Mexico Institute of Mining and Technology [New Mexico Tech] (NMT), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), University of Oxford, Institute of Applied Physics 'Nello Carrara' (IFAC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Chimica Fisica e Inorganica [Bologna], Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), National Institute of Water and Atmospheric Research [Lauder] (NIWA), Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Smithsonian Institution-Harvard University [Cambridge], California Institute of Technology (CALTECH)-NASA, Consiglio Nazionale delle Ricerche (CNR), and Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille
Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere
Abstract: International audience; The Atmospheric Chemistry Experiment (ACE) satellite was launched on 12 August 2003. Its two instruments measure vertical profiles of over 30 atmospheric trace gases by analyzing solar occultation spectra in the ultraviolet/visible and infrared wavelength regions. The reservoir gases HNO3, ClONO2, and N2O5 are three of the key species provided by the primary instrument, the ACE Fourier Transform Spectrometer (ACE-FTS). This paper describes the ACE-FTS version 2.2 data products, including the N2O5 update, for the three species and presents validation comparisons with available observations. We have compared volume mixing ratio (VMR) profiles of HNO3, ClONO2, and N2O5 with measurements by other satellite instruments (SMR, MLS, MIPAS), aircraft measurements (ASUR), and single balloon-flights (SPIRALE, FIRS-2). Partial columns of HNO3 and ClONO2 were also compared with measurements by ground-based Fourier Transform Infrared (FTIR) spectrometers. Overall the quality of the ACE-FTS v2.2 HNO3 VMR profiles is good from 18 to 35 km. For the statistical satellite comparisons, the mean absolute differences are generally within ±1 ppbv (±20%) from 18 to 35 km. For MIPAS and MLS comparisons only, mean relative differences lie within ±10% between 10 and 36 km. ACE-FTS HNO3 partial columns (~15–30 km) show a slight negative bias of -1.3% relative to the ground-based FTIRs at latitudes ranging from 77.8° S–76.5° N. Good agreement between ACE-FTS ClONO2 and MIPAS, using the Institut für Meteorologie und Klimaforschung and Instituto de Astrofisica de Andalucia (IMK-IAA) data processor is seen. Mean absolute differences are typically within ±0.01 ppbv between 16 and 27 km and less than +0.09 ppbv between 27 and 34 km. The ClONO2 partial column comparisons show varying degrees of agreement, depending on the location and the quality of the FTIR measurements. Good agreement was found for the comparisons with the midlatitude Jungfraujoch partial columns for which the mean relative difference is 4.7%. ACE-FTS N2O5 has a low bias relative to MIPAS IMK-IAA, reaching -0.25 ppbv at the altitude of the N2O5 maximum (around 30 km). Mean absolute differences at lower altitudes (16–27 km) are typically -0.05 ppbv for MIPAS nighttime and ±0.02 ppbv for MIPAS daytime measurements.
Published: 2008

9. Validation of HNO₃, ClONO₂, and N₂O₅ from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

Author: Wolff, M.A., Kerzenmacher, T., Strong, K., Walker, K.A., Toohey, M., Dupuy, E., Bernath, P.F., Boone, C.D., Brohede, S., Catoire, N., Clarmann, T.Von, Coffey, M., Daffer, W.H., De Maziere, M., Duchatelet, P., Glatthor, N., Griffith, D.W.T., Hannigan, J., Hase, F., Höpfner, M., Huret, N., Jones, N., Jucks, K., Kagawa, A., Kasai, Y., Kramer, I., Küllmann, H., Kuttippurath, J., Mahieu, E., Manney, G., McElroy, C.T., McLinden, C., Mebarki, Y., Mikuteit, S., Murtagh, D., Piccolo, C., Raspollini, P., Ridolfi, M., Ruhnke, R., Santee, M., Senten, C., Smale, D., Tetard, C., Urban, J., and Wood, S.
Subjects: Earth sciences, ddc:550
Published: 2008

10. Geophysical validation of MIPAS-ENVISAT operational ozone data

Author: Cortesi, U. Lambert, J.C. De Clercq, C. Bianchini, G. Blumenstock, T. Bracher, A. Castelli, E. Catoire, V. Chance, K.V. De Mazière, M. Demoulin, P. Godin-Beekmann, S. Jones, N. Jucks, K. Keim, C. Kerzenmacher, T. Kuellmann, H. Kuttippurath, J. Iarlori, M. Liu, G.Y. Liu, Y. McDermid, I.S. Meijer, Y.J. Mencaraglia, F. Mikuteit, S. Oelhaf, H. Piccolo, C. Pirre, M. Raspollini, P. Ravegnani, F. Reburn, W.J. Redaelli, G. Remedios, J.J. Sembhi, H. Smale, D. Steck, T. Taddei, A. Varotsos, C. Vigouroux, C. Waterfall, A. Wetzel, G. Wood, S.
Abstract: The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), on-board the European ENVIronmental SATellite (ENVISAT) launched on 1 March 2002, is a middle infrared Fourier Transform spectrometer measuring the atmospheric emission spectrum in limb sounding geometry. The instrument is capable to retrieve the vertical distribution of temperature and trace gases, aiming at the study of climate and atmospheric chemistry and dynamics, and at applications to data assimilation and weather forecasting. MIPAS operated in its standard observation mode for approximately two years, from July 2002 to March 2004, with scans performed at nominal spectral resolution of 0.025 cm -1 and covering the altitude range from the mesosphere to the upper troposphere with relatively high vertical resolution (about 3 km in the stratosphere). Only reduced spectral resolution measurements have been performed subsequently. MIPAS data were re-processed by ESA using updated versions of the Instrument Processing Facility (IPF v4.61 and v4.62) and provided a complete set of level-2 operational products (geolocated vertical profiles of temperature and volume mixing ratio of H2O, O3, HNO3, CH4, N2O and NO2) with quasi continuous and global coverage in the period of MIPAS full spectral resolution mission. In this paper, we report a detailed description of the validation of MIPAS-ENVISAT operational ozone data, that was based on the comparison between MIPAS v4.61 (and, to a lesser extent, v4.62) O3 VMR profiles and a comprehensive set of correlative data, including observations from ozone sondes, ground-based lidar, FTIR and microwave radiometers, remote-sensing and in situ instruments on-board stratospheric aircraft and balloons, concurrent satellite sensors and ozone fields assimilated by the European Center for Medium-range Weather Forecasting. A coordinated effort was carried out, using common criteria for the selection of individual validation data sets, and similar methods for the comparisons. This enabled merging the individual results from a variety of independent reference measurements of proven quality (i.e. well characterized error budget) into an overall evaluation of MIPAS O3 data quality, having both statistical strength and the widest spatial and temporal coverage. Collocated measurements from ozone sondes and ground-based lidar and microwave radiometers of the Network for the Detection Atmospheric Composition Change (NDACC) were selected to carry out comparisons with time series of MIPAS O 3 partial columns and to identify groups of stations and time periods with a uniform pattern of ozone differences, that were subsequently used for a vertically resolved statistical analysis. The results of the comparison are classified according to synoptic and regional systems and to altitude intervals, showing a generally good agreement within the comparison error bars in the upper and middle stratosphere. Significant differences emerge in the lower stratosphere and are only partly explained by the larger contributions of horizontal and vertical smoothing differences and of collocation errors to the total uncertainty. Further results obtained from a purely statistical analysis of the same data set from NDACC ground-based lidar stations, as well as from additional ozone soundings at middle latitudes and from NDACC ground-based FTIR measurements, confirm the validity of MIPAS O3 profiles down to the lower stratosphere, with evidence of larger discrepancies at the lowest altitudes. The validation against O3 VMR profiles using collocated observations performed by other satellite sensors (SAGE II, POAM III, ODIN-SMR, ACE-FTS, HALOE, GOME) and ECMWF assimilated ozone fields leads to consistent results, that are to a great extent compatible with those obtained from the comparison with ground-based measurements. Excellent agreement in the full vertical range of the comparison is shown with respect to collocated ozone data from stratospheric aircraft and balloon instruments, that was mostly obtained in very good spatial and temporal coincidence with MIPAS scans. This might suggest that the larger differences observed in the upper troposphere and lowermost stratosphere with respect to collocated ground-based and satellite O3 data are only partly due to a degradation of MIPAS data quality. They should be rather largely ascribed to the natural variability of these altitude regions and to other components of the comparison errors. By combining the results of this large number of validation data sets we derived a general assessment of MIPAS v4.61 and v4.62 ozone data quality. A clear indication of the validity of MIPAS O3 vertical profiles is obtained for most of the stratosphere, where the mean relative difference with the individual correlative data sets is always lower than ±10%. Furthermore, these differences always fall within the combined systematic error (from 1 hPa to 5OhPa) and the standard deviation is fully consistent with the random error of the comparison (from 1 hPa to ∼~30-40hPa). A degradation in the quality of the agreement is generally observed in the lower stratosphere and upper troposphere, with biases up to 25% at 100 hPa and standard deviation of the global mean differences up to three times larger than the combined random error in the range 50-100 hPa. The larger differences observed at the bottom end of MIPAS retrieved profiles can be associated, as already noticed, to the effects of stronger atmospheric gradients in the UTLS that are perceived differently by the various measurement techniques. However, further components that may degrade the results of the comparison at lower altitudes can be identified as potentially including cloud contamination, which is likely not to have been fully filtered using the current settings of the MIPAS cloud detection algorithm, and in the linear approximation of the forward model that was used for the a priori estimate of systematic error components. The latter, when affecting systematic contributions with a random variability over the spatial and temporal scales of global averages, might result in an underestimation of the random error of the comparison and add up to other error sources, such as the possible underestimates of the p and T error propagation based on the assumption of a 1K and 2% uncertainties, respectively, on MIPAS temperature and pressure retrievals. At pressure lower than 1 hPa, only a small fraction of the selected validation data set provides correlative ozone data of adequate quality and it is difficult to derive quantitative conclusions about the performance of MIPAS O2 retrieval for the topmost layers.
Published: 2007

11. Geophysical validation of MIPAS-ENVISAT operational ozone data

Author: Cortesi, U., Lambert, J. C., De Clercq, C., Bianchini, G., Blumenstock, T., Bracher, Astrid, Castelli, E., Catoire, V., Chance, K. V., De Maziere, M., Demoulin, P., Godin-Beekman, S., Jones, N., Jucks, K., Keim, C., Kerzenmacher, T., Kuellmann, H., Kuttippurath, J., Iarlori, M., Liu, Y., McDermid, I. S., Meijer, Y., Mencaraglia, F., Oelhaf, H., Piccolo, C., Pirre, M., Raspollini, P., Ravegnani, F., Reburn, W. J., Redaelli, G., Sembhi, H., Smale, D., Steck, T., Taddei, A., Varotsos, K., Vigouroux, C., Waterfall, A., Wetzel, G., and Wood, S.
Abstract: Part of the abstract: The Michelson Interferometer for Passive AtmosphericSounding (MIPAS), on-board the European ENVIronmentalSATellite (ENVISAT) launched on 1 March 2002,is a middle infrared Fourier Transform spectrometer measuringthe atmospheric emission spectrum in limb sounding geometry.The instrument is capable to retrieve the vertical distributionMIPAS data were re-processed by ESA using updated versions ofthe Instrument Processing Facility (IPF v4.61 and v4.62) andprovided a complete set of level-2 operational products (geolocatedvertical profiles of temperature and volume mixingratio of H2O, O3, HNO3, CH4, N2O and NO2). MIPAS operated in its standard observation mode for approximately two years, from July 2002 to March 2004. MIPAS data were re-processed by ESA using updated versions of the Instrument Processing Facility (IPF v4.61 and v4.62) and provided a complete set of level-2 operational products (geolocated vertical profiles of temperature and volume mixing ratio of H2O, O3, HNO3, CH4, N2O and NO2). MIPAS operated in its standard observation mode from July 2002 to March 2004, covering the altitude range from the mesosphere to the upper troposphere with relatively high vertical resolution (about 3 km in the stratosphere). In this paper, we report a detailed description of the validation of MIPAS-ENVISAT operational ozone data, that was based on the comparison between MIPAS v4.61 (and, to a lesser extent, v4.62) O3 VMR profilesand a comprehensive set of correlative data, including observations from ozone sondes, ground-based lidar, FTIR and microwave radiometers, remote-sensing and in situ instruments on-board stratospheric aircraft and balloons, concurrent satellite sensors and ozone fields assimilated by theEuropean Center for Medium-range Weather Forecasting. A clear indication of the validity of MIPAS O3 vertical profiles is obtained for most of the stratosphere, where the mean relative difference with the individual correlative data sets is always lower than ±10%. Furthermore, these differences always fall within the combined systematic error (from1 hPa to 50 hPa) and the standard deviation is fully consistent with the random error of the comparison (from 1 hPa to 3040 hPa).
Published: 2007

12. Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O

Author: Dus, B., Mazière, M., Müller, J. F., Blumenstock, T., Buchwitz, M., Beek, R., Demoulin, P., Duchatelet, P., Fast, H., Frankenberg, C., Gloudemans, A., Griffith, D., Jones, N., Kerzenmacher, T., Kramer, I., Mahieu, E., Mellqvist, J., Mittermeier, R. L., Notholt, J., Rinsland, C. P., Schrijver, H., Smale, D., Strandberg, A., Straume, A. G., Wolfgang Michael Helmut Stremme, Strong, K., Sussmann, R., Taylor, J., Den Broek, M., Velazco, V., Wagner, T., Warneke, T., Wiacek, A., Wood, S., Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Forschungszentrum Karlsruhe and University Karlsruhe, Institute of Environmental Physics [Bremen] (IUP), University of Bremen, Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Environment and Climate Change Canada, SRON Netherlands Institute for Space Research (SRON), University of Wollongong [Australia], Department of Physics [Toronto], University of Toronto, Chalmers University of Technology [Göteborg], NASA Headquarters, National Institute of Water and Atmospheric Research [Lauder] (NIWA), and Forschungszentrum Karlsruhe
Subjects: lcsh:Chemistry, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, lcsh:QD1-999, lcsh:Physics, lcsh:QC1-999
Abstract: International audience; Total column amounts of CO, CH4, CO2 and N2O retrieved from SCIAMACHY nadir observations in its near-infrared channels have been compared to data from a ground-based quasi-global network of Fourier-transform infrared (FTIR) spectrometers. The SCIAMACHY data considered here have been produced by three different retrieval algorithms, WFM-DOAS (version 0.5 for CO and CH4 and version 0.4 for CO2 and N2O), IMAP-DOAS (version 1.1 and 0.9 (for CO)) and IMLM (version 6.3) and cover the January to December 2003 time period. Comparisons have been made for individual data, as well as for monthly averages. To maximize the number of reliable coincidences that satisfy the temporal and spatial collocation criteria, the SCIAMACHY data have been compared with a temporal 3rd order polynomial interpolation of the ground-based data. Particular attention has been given to the question whether SCIAMACHY observes correctly the seasonal and latitudinal variability of the target species. The present results indicate that the individual SCIAMACHY data obtained with the actual versions of the algorithms have been significantly improved, but that the quality requirements, for estimating emissions on regional scales, are not yet met. Nevertheless, possible directions for further algorithm upgrades have been identified which should result in more reliable data products in a near future.
Published: 2006

13. Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O

Author: Dils, B., De Mazière, M., Blumenstock, T., Buchwitz, M., De Beek, R., Demoulin, P., Duchatelet, P., Fast, H., Frankenberg, C., Gloudemans, A., Griffith, D., Jones, N., Kerzenmacher, T., Kramer, I., Mahieu, E., Mellqvist, J., Mittermeier, R. L., Notholt, J., Rinsland, C. P., Schrijver, H., Smale, D., Strandberg, A., Straume, A. G., Stremme, W., Strong, K., Sussmann, R., Taylor, James, Van Den Broek, M., Wagner, T., Warneke, T., Wiacek, A., Wood, S., Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Forschungszentrum Karlsruhe, Institute of Environmental Physics [Bremen] (IUP), University of Bremen, Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Meteorological Service of Canada (MSC), University of Wollongong [Australia], University of Toronto, Chalmers University of Technology [Göteborg], NASA Headquarters, and SRON Netherlands Institute for Space Research (SRON)
Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
Abstract: International audience; Total column amounts of CO, CH4, CO2 and N2O retrieved from SCIAMACHY nadir observations in its near-infrared channels have been compared to data from a ground-based quasi-global network of Fourier-transform infrared (FTIR) spectrometers. The SCIAMACHY data considered here have been produced by three different retrieval algorithms, WFM-DOAS (version 0.4, 0.41 for CH4), IMAP-DOAS (version 0.9) and IMLM (version 5.5) and cover the January to December 2003 time period. Comparisons have been made for individual data, as well as for monthly averages. To maximize the number of reliable coincidences that satisfy the temporal and spatial collocation criteria, the SCIAMACHY data have been compared with a temporal 3rd order polynomial interpolation of the ground-based data. Particular attention has been given to the question whether SCIAMACHY observes correctly the seasonal and latitudinal variability of the target species. The ensemble of comparisons, discussed in this paper, demonstrate the capability of SCIAMACHY, using any of the three algorithms, to deliver products for the target species under consideration, which are already useful for qualitative geophysical studies on a global scale. It is expected that the remaining uncertainties in the data products will decrease in future versions of the algorithm to also allow more quantitative investigations on a regional scale.
Published: 2005

14. Validation of IASI FORLI carbon monoxide retrievals using FTIR data from NDACC

Author: Kerzenmacher, T, Dils, B, Kumps, N, Blumenstock, T, Clerbaux, C, Coheur, P F, Demoulin, P, Garcia, Omaira, George, M, Griffith, David W, Hase, F, Hadji-Lazaro, J, Hurtmans, D, Jones, Nicholas B, Mahieu, E, Notholt, Justus, Paton-Walsh, Clare, Raffalski, U, Ridder, T, Schneider, M, Servais, C, De Maziere, M, Kerzenmacher, T, Dils, B, Kumps, N, Blumenstock, T, Clerbaux, C, Coheur, P F, Demoulin, P, Garcia, Omaira, George, M, Griffith, David W, Hase, F, Hadji-Lazaro, J, Hurtmans, D, Jones, Nicholas B, Mahieu, E, Notholt, Justus, Paton-Walsh, Clare, Raffalski, U, Ridder, T, Schneider, M, Servais, C, and De Maziere, M
Abstract: Carbon monoxide (CO) is retrieved daily and globally from space-borne IASI radiance spectra using the Fast Optimal Retrievals on Layers for IASI (FORLI) software developed at the Universit´e Libre de Bruxelles (ULB). The IASI CO total column product for 2008 from the most recent FORLI retrieval version (20100815) is evaluated using correlative CO profile products retrieved from groundbased solar absorption Fourier transform infrared (FTIR) observations at the following FTIR spectrometer sites from the Network for the Detection of Atmospheric Composition Change (NDACC): Ny-A° lesund, Kiruna, Bremen, Jungfraujoch, Iza˜na and Wollongong. In order to have good statistics for the comparisons, we included all IASI data from the same day, within a 100 km radius around the ground-based stations. The individual ground-based data were adjusted to the lowest altitude of the co-located IASI CO profiles. To account for the different vertical resolutions and sensitivities of the ground-based and satellite measurements, the averaging kernels associated with the various retrieved products have been used to properly smooth coincident data products. It has been found that the IASI CO total column products compare well on average with the co-located ground-based FTIR total columns at the selected NDACC sites and that there is no significant bias for the mean values at all stations.
Published: 2012

15. A global inventory of stratospheric NOy from ACE-FTS

Author: Jones, A., Qin, G., Strong, K., Walker, Kaley A., McLinden, C. A., Toohey, Matthew, Kerzenmacher, T., Bernath, P. F., Boone, C. D., Jones, A., Qin, G., Strong, K., Walker, Kaley A., McLinden, C. A., Toohey, Matthew, Kerzenmacher, T., Bernath, P. F., and Boone, C. D.
Abstract: The Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) on board the Canadian SCISAT-1 satellite (launched in August 2003) measures over 30 different atmospheric species, including six nitrogen trace gases that are needed to quantify the stratospheric NOy budget. We combine volume mixing ratio (VMR) profiles for NO, NO2, HNO3, N2O5, ClONO2, and HNO4 to determine a zonally averaged NOy climatology on monthly and 3 month combined means (December–February, March–May, June–August, and September–November) at 5° latitude spacing and on 33 pressure surfaces. Peak NOy VMR concentrations (15–20 ppbv) are situated at about 3 hPa (∼40 km) in the tropics, while they are typically lower at about 10 hPa (∼30 km) in the midlatitudes. Mean NOy VMRs are similar in both the northern and southern polar regions, with the exception of large enhancements periodically observed in the upper stratosphere and lower mesosphere. These are primarily due to enhancements of NO due to energetic particle precipitation and downward transport. Other features in the NOy budget are related to descent in the polar vortex, heterogeneous chemistry, and denitrification processes. Comparison of the ACE-FTS NOy budget is made to both the Odin and ATMOS NOy data sets, showing in both cases a good level of agreement, such that relative differences are typically better than 20%. The NOy climatological products are available through the ACE website and are a supplement to the paper. - A middle-atmosphere NOy climatology has been produced using ACE-FTS measurements; - A robust method for quality controlling the input data has been developed - Good agreement is found between ACE-FTS NOy climatology and other climatologies
Published: 2011
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16. Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Author: Burrows, J. P., Christensen, T., Dupuy, E., Walker, K. A., Kar, J., Boone, C. D., McElroy, C. T., Bernath, P. F., Drummond, J. R., Skelton, R., McLeod, S. D., Hughes, R. C., Nowlan, C. R., Dufour, D. G., Zou, J., Nichitiu, F., Strong, K., Baron, P., Bevilacqua, R. M., Blumenstock, T., Bodeker, G. E., Borsdorff, T., Bourassa, A. E., Bovensmann, H., Boyd, I. S., Bracher, Astrid, Brogniez, C., Catoire, V., Ceccherini, S., Chabrillat, S., Coffey, M. T., Cortesi, U., Davies, J., De Clercq, C., Degenstein, D. A., De Maziere, M., Demoulin, P., Dodion, J., Firanski, B., Fischer, Hubertus, Forbes, G., Froidevaux, L., Fussen, D., Gerard, P., Godin-Beekmann, S., Goutail, F., Granville, J., Griffith, D., Haley, C. S., Hannigan, J. W., Höpfner, M., Jin, J. J., Jones, A., Jones, N. B., Jucks, K., Kagawa, A., Kasai, Y., Kerzenmacher, T. E., Kleinböhl, A., Klekociuk, A. R., Kramer, I., Küllmann, H., Kuttippurath, J., Kyrölä, E., Lambert, J. C., Livesey, N. J., Llewellyn, E. J., Lloyd, N. D., Mahieu, E., Manney, G. L., Marshall, B. T., McConnell, J. C., McCormick, M. P., McDermid, I. S., McHugh, M., McLinden, C. A., Mellqvist, J., Mizutani, K., Murayama, Y., Murtagh, D. P., Oelhaf, H., Parrish, A., Petelina, S. V., Piccolo, C., Pommereau, J.-P., Randall, C. E., Robert, C., Roth, C., Russell III, J. M., Schneider, M., Senten, C., Steck, T., Strandberg, A., Strawbridge, K. B., Sussmann, R., Swart, D. P. J., Tarasick, D. W., Taylor, James, Tétard, C., Thomason, L. W., Thompson, A. M., Tully, M. B., Urban, J., Vanhellemont, F., von Clarmann, T., von der Gathen, Peter, von Savigny, C., Waters, J. W., Witte, J. C., Wolff, Martha Maria, Zawodny, J. M., Burrows, J. P., Christensen, T., Dupuy, E., Walker, K. A., Kar, J., Boone, C. D., McElroy, C. T., Bernath, P. F., Drummond, J. R., Skelton, R., McLeod, S. D., Hughes, R. C., Nowlan, C. R., Dufour, D. G., Zou, J., Nichitiu, F., Strong, K., Baron, P., Bevilacqua, R. M., Blumenstock, T., Bodeker, G. E., Borsdorff, T., Bourassa, A. E., Bovensmann, H., Boyd, I. S., Bracher, Astrid, Brogniez, C., Catoire, V., Ceccherini, S., Chabrillat, S., Coffey, M. T., Cortesi, U., Davies, J., De Clercq, C., Degenstein, D. A., De Maziere, M., Demoulin, P., Dodion, J., Firanski, B., Fischer, Hubertus, Forbes, G., Froidevaux, L., Fussen, D., Gerard, P., Godin-Beekmann, S., Goutail, F., Granville, J., Griffith, D., Haley, C. S., Hannigan, J. W., Höpfner, M., Jin, J. J., Jones, A., Jones, N. B., Jucks, K., Kagawa, A., Kasai, Y., Kerzenmacher, T. E., Kleinböhl, A., Klekociuk, A. R., Kramer, I., Küllmann, H., Kuttippurath, J., Kyrölä, E., Lambert, J. C., Livesey, N. J., Llewellyn, E. J., Lloyd, N. D., Mahieu, E., Manney, G. L., Marshall, B. T., McConnell, J. C., McCormick, M. P., McDermid, I. S., McHugh, M., McLinden, C. A., Mellqvist, J., Mizutani, K., Murayama, Y., Murtagh, D. P., Oelhaf, H., Parrish, A., Petelina, S. V., Piccolo, C., Pommereau, J.-P., Randall, C. E., Robert, C., Roth, C., Russell III, J. M., Schneider, M., Senten, C., Steck, T., Strandberg, A., Strawbridge, K. B., Sussmann, R., Swart, D. P. J., Tarasick, D. W., Taylor, James, Tétard, C., Thomason, L. W., Thompson, A. M., Tully, M. B., Urban, J., Vanhellemont, F., von Clarmann, T., von der Gathen, Peter, von Savigny, C., Waters, J. W., Witte, J. C., Wolff, Martha Maria, and Zawodny, J. M.
Abstract: This paper presents extensive {bias determination} analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloon-borne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (4560 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about +20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within ±10% (average values within ±6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (~3555 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to −10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 4555 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.
Published: 2009

17. Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Author: Jones, Nicholas B, Griffith, David W, Wolff, M, Mahieu, E, Bodeker, G, Boyd, I, De Maziere, M, Demoulin, P, Blumenstock, T, Murayama, Y., Kagawa, A., Jin, J, McElroy, Christopher, Hannigan, J, Coffey, M, Hopfner, M, Fischer, H W, Kerzenmacher, T, Kramer, I, Mellqvist, J, Sussmann, R, Strong, K, Taylor, J R, Mizutani, K, Kasai, Y, Urban, J, Murtagh, D, Dupuy, E, Catoire, V, Chabrillat, S, Baron, P, Brogniez, C, Manney, G L, Piccolo, C, Randall, C, Robert, C, Senten, C, Tetard, C, Livesey, N J, Kleinbohl, A, Godin-Beekmann, S, Borsdorff, T, Drummond, James, De Clercq, C, Lambert, J C, Cortesi, U, Jucks, K W, Boone, C, Oelhaf, H, Schneider, M, Steck, T, Walker, K A, Bernath, P, von Clarmann, T, Hughes, R, Vigouroux, C, Kuttippurath, J, Bracher, A, McConnell, J, McLinden, C, Kullmann, H, Froidevaux, L, Dodion, J, Vanhellemont, F, Burrows, J P, kar, J, Goutail, F, Dufour, D G, Zawodny, J M, Nichitiu, F, Pommereau, J-P, Nowlan, C, Fussen, D, Zou, J, Klekociuk, A R, Forbes, G, Bovensmann, H, Bevilacqua, R M, Haley, C, Ceccherini, S, McLeod, S D, Gerard, P, Skelton, R, Firanski, B, Bourassa, A E, Degenstein, D A, Davies, J, Christensen, T, Granville, J, Parrish, A, Roth, C, Waters, J W, von Savigny, C, Standberg, A, McHugh, M, Thompson, A M, Llewellyn, E J, von der Gathen, P, Tully, M B, Witte, J C, Marshall, B T, Strawbridge, K B, Kyrola, E, McCormick, M P, Swart, D P J, Lloyd, N D, Tarasick, D W, Petelina, S V, Thomason, L W, Jones, A, McDermid, I S, Jones, Nicholas B, Griffith, David W, Wolff, M, Mahieu, E, Bodeker, G, Boyd, I, De Maziere, M, Demoulin, P, Blumenstock, T, Murayama, Y., Kagawa, A., Jin, J, McElroy, Christopher, Hannigan, J, Coffey, M, Hopfner, M, Fischer, H W, Kerzenmacher, T, Kramer, I, Mellqvist, J, Sussmann, R, Strong, K, Taylor, J R, Mizutani, K, Kasai, Y, Urban, J, Murtagh, D, Dupuy, E, Catoire, V, Chabrillat, S, Baron, P, Brogniez, C, Manney, G L, Piccolo, C, Randall, C, Robert, C, Senten, C, Tetard, C, Livesey, N J, Kleinbohl, A, Godin-Beekmann, S, Borsdorff, T, Drummond, James, De Clercq, C, Lambert, J C, Cortesi, U, Jucks, K W, Boone, C, Oelhaf, H, Schneider, M, Steck, T, Walker, K A, Bernath, P, von Clarmann, T, Hughes, R, Vigouroux, C, Kuttippurath, J, Bracher, A, McConnell, J, McLinden, C, Kullmann, H, Froidevaux, L, Dodion, J, Vanhellemont, F, Burrows, J P, kar, J, Goutail, F, Dufour, D G, Zawodny, J M, Nichitiu, F, Pommereau, J-P, Nowlan, C, Fussen, D, Zou, J, Klekociuk, A R, Forbes, G, Bovensmann, H, Bevilacqua, R M, Haley, C, Ceccherini, S, McLeod, S D, Gerard, P, Skelton, R, Firanski, B, Bourassa, A E, Degenstein, D A, Davies, J, Christensen, T, Granville, J, Parrish, A, Roth, C, Waters, J W, von Savigny, C, Standberg, A, McHugh, M, Thompson, A M, Llewellyn, E J, von der Gathen, P, Tully, M B, Witte, J C, Marshall, B T, Strawbridge, K B, Kyrola, E, McCormick, M P, Swart, D P J, Lloyd, N D, Tarasick, D W, Petelina, S V, Thomason, L W, Jones, A, and McDermid, I S
Abstract: This paper presents extensive bias determination analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloonborne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACEFTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (45¿60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about +20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within +10% (average values within +6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (35¿55 km), systematic biases of opposite sign are found between the ACEMAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to ¿10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 45¿55 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.
Published: 2009

18. Validation of NO2 and NO from the Atmospheric Chemistry Experiment (ACE)

Author: Jones, Nicholas B, Griffith, David W, Wolff, M, Llewellyn, L, Blumenstock, T, McElroy, Christopher, Hopfner, M, Kerzenmacher, T, Kramer, I, Strong, K, Haley, Cassandra, Taylor, J R, Warneke, Thorsten, Murtagh, D, Dupuy, E, Catoire, V, Huret, N, Brogniez, C, Manney, G L, Piccolo, C, Randall, C, Tetard, C, Lopez-Puertas, M, Drummond, James, Boone, C, Funke, B, Schneider, M, Mikuteit, S, Stiller, G P, Walker, K A, Bernath, P, Schrems, O, Raspollini, P, McLinden, C, Brohede, S, Toohey, M, Ridolfi, M, Dodion, J, Vanhellemont, F, Batchelor, R L, Burrows, J P, kar, J, Amekudzi, L K, Melo, S, Goutail, F, Bramstedt, C, Dufour, D G, Silicani, M, Zawodny, J M, Richter, A, Berthet, G, Nichitiu, F, Pommereau, J-P, Nowlan, C, Fussen, D, Zou, J, Pakula, Irwin S, Notholt, Justus, Jones, Nicholas B, Griffith, David W, Wolff, M, Llewellyn, L, Blumenstock, T, McElroy, Christopher, Hopfner, M, Kerzenmacher, T, Kramer, I, Strong, K, Haley, Cassandra, Taylor, J R, Warneke, Thorsten, Murtagh, D, Dupuy, E, Catoire, V, Huret, N, Brogniez, C, Manney, G L, Piccolo, C, Randall, C, Tetard, C, Lopez-Puertas, M, Drummond, James, Boone, C, Funke, B, Schneider, M, Mikuteit, S, Stiller, G P, Walker, K A, Bernath, P, Schrems, O, Raspollini, P, McLinden, C, Brohede, S, Toohey, M, Ridolfi, M, Dodion, J, Vanhellemont, F, Batchelor, R L, Burrows, J P, kar, J, Amekudzi, L K, Melo, S, Goutail, F, Bramstedt, C, Dufour, D G, Silicani, M, Zawodny, J M, Richter, A, Berthet, G, Nichitiu, F, Pommereau, J-P, Nowlan, C, Fussen, D, Zou, J, Pakula, Irwin S, and Notholt, Justus
Abstract: Vertical profiles of NO2 and NO have been obtained from solar occultation measurements by the Atmospheric Chemistry Experiment (ACE), using an infrared Fourier Transform Spectrometer (ACE-FTS) and (for NO2) an ultraviolet-visible-near-infrared spectrometer, MAESTRO (Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation). In this paper, the quality of the ACE-FTS version 2.2 NO2 and NO and the MAESTRO version 1.2 NO2 data are assessed using other solar occultation measurements (HALOE, SAGE II, SAGEIII, POAMIII, SCIAMACHY), stellar occultation measurements (GOMOS), limb measurements (MIPAS, OSIRIS), nadir measurements (SCIAMACHY), balloon-borne measurements (SPIRALE, SAOZ) and ground-based measurements (UV-VIS, FTIR). Time differences between the comparison measurements were reduced using either a tight coincidence criterion, or where possible, chemical box models. ACE-FTS NO2 and NO and the MAESTRO NO2 are generally consistent with the correlative data. The ACE-FTS and MAESTRO NO2 volume mixing ratio (VMR) profiles agree with the profiles from other satellite data sets to within about 20% between 25 and 40 km, with the exception of MIPAS ESA (for ACE-FTS) and SAGEII (for ACE-FTS (sunrise) and MAESTRO) and suggest a negative bias between 23 and 40 km of about 10%. MAESTRO reports larger VMR values than the ACE-FTS. In comparisons with HALOE, ACE-FTS NO VMRs typically (on average) agree to ±8% from 22 to 64 km and to +10% from 93 to 105 km, with maxima of 21% and 36%, respectively. Partial column comparisons for NO2 show that there is quite good agreement between the ACE instruments and the FTIRs, with a mean difference of +7.3% for ACEFTS and +12.8% for MAESTRO.
Published: 2008

19. Validation of HNO3, C1ONO2, and N2O5 from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

Author: Wolff, M A, Kerzenmacher, T, Strong, K, Walker, K A, Toohey, M, Dupuy, E, Bernath, P F, Boone, C, Brohede, S, Catoire, V, von Clarmann, T, Coffey, M, Daffer, W, De Maziere, M, Duchatelet, P, Glatthor, N, Griffith, David W, Hannigan, J, Hase, F, Hopfner, M, Huret, N, Jones, Nicholas B, Jucks, K W, Kagawa, A., Kasai, Y, Kramer, I, Kullmann, H, Kuttippurath, J, Mahieu, E, Manney, G L, McElroy, Christopher, McLinden, C, Mebarki, Y, Mikuteit, S, Murtagh, D, Piccolo, C, Raspollini, P, Ridolfi, M, Ruhnke, R, Santee, M, Senten, C, Smale, D, Tetard, C, Urban, J, Wood, S, Wolff, M A, Kerzenmacher, T, Strong, K, Walker, K A, Toohey, M, Dupuy, E, Bernath, P F, Boone, C, Brohede, S, Catoire, V, von Clarmann, T, Coffey, M, Daffer, W, De Maziere, M, Duchatelet, P, Glatthor, N, Griffith, David W, Hannigan, J, Hase, F, Hopfner, M, Huret, N, Jones, Nicholas B, Jucks, K W, Kagawa, A., Kasai, Y, Kramer, I, Kullmann, H, Kuttippurath, J, Mahieu, E, Manney, G L, McElroy, Christopher, McLinden, C, Mebarki, Y, Mikuteit, S, Murtagh, D, Piccolo, C, Raspollini, P, Ridolfi, M, Ruhnke, R, Santee, M, Senten, C, Smale, D, Tetard, C, Urban, J, and Wood, S
Abstract: The Atmospheric Chemistry Experiment (ACE) satellite was launched on 12 August 2003. Its two instruments measure vertical profiles of over 30 atmospheric trace gases by analyzing solar occultation spectra in the ultraviolet/visible and infrared wavelength regions. The reservoir gases HNO3, ClONO2, and N2O5 are three of the key species provided by the primary instrument, the ACE Fourier Transform Spectrometer (ACE-FTS). This paper describes the ACE-FTS version 2.2 data products, including the N2O5 update, for the three species and presents validation comparisons with available observations. We have compared volume mixing ratio (VMR) profiles of HNO3, ClONO2, and N2O5 with measurements by other satellite instruments (SMR, MLS, MIPAS), aircraft measurements (ASUR), and single balloon-flights (SPIRALE, FIRS-2). Partial columns of HNO3 and ClONO2 were also compared with measurements by ground-based Fourier Transform Infrared (FTIR) spectrometers. Overall the quality of the ACE-FTS v2.2 HNO3 VMR profiles is good from 18 to 35 km. For the statistical satellite comparisons, the mean absolute differences are generally within ±1 ppbv ±20%) from 18 to 35 km. For MIPAS and MLS comparisons only, mean relative differences lie within±10% between 10 and 36 km. ACE-FTS HNO3 partial columns (~15–30 km) show a slight negative bias of −1.3% relative to the ground-based FTIRs at latitudes ranging from 77.8° S–76.5° N. Good agreement between ACE-FTS ClONO2 and MIPAS, using the Institut für Meteorologie und Klimaforschung and Instituto de Astrofísica de Andalucía (IMK-IAA) data processor is seen. Mean absolute differences are typically within ±0.01 ppbv between 16 and 27 km and less than +0.09 ppbv between 27 and 34 km. The ClONO2 partial column comparisons show varying degrees of agreement, depending on the location and the quality of the FTIR measurements. Good agreement was found for the comparisons with the midlatitude Jungfraujoch partial columns for which the mean relative differenc
Published: 2008

20. Validation of ACE-FTS N2O measurements

Author: Strong, K, Wolff, M, Kerzenmacher, T, Walker, K A, Jones, Nicholas B, Griffith, David W, Mahieu, E, Wood, S, De Maziere, M, Demoulin, P, Blumenstock, T, Jin, J, Hannigan, J, Coffey, M, Hopfner, M, Duchatelet, P, Mellqvist, J, Strandberg, A, Taylor, J R, Warneke, Thorsten, Urban, J, Murtagh, D, Dupuy, E, Catoire, V, Piccolo, C, Robert, C, Senten, C, Tetard, C, Jucks, K W, Boone, C, Glatthor, N, Schneider, M, Mikuteit, S, Stiller, G P, Bernath, P, Schrems, O, Kuellmann, H, Raspollini, P, Lambert, A, McConnell, J, kittippurath, J, Semeniuk, K, Toohey, M, Ridolfi, M, Notholt, Justus, Strong, K, Wolff, M, Kerzenmacher, T, Walker, K A, Jones, Nicholas B, Griffith, David W, Mahieu, E, Wood, S, De Maziere, M, Demoulin, P, Blumenstock, T, Jin, J, Hannigan, J, Coffey, M, Hopfner, M, Duchatelet, P, Mellqvist, J, Strandberg, A, Taylor, J R, Warneke, Thorsten, Urban, J, Murtagh, D, Dupuy, E, Catoire, V, Piccolo, C, Robert, C, Senten, C, Tetard, C, Jucks, K W, Boone, C, Glatthor, N, Schneider, M, Mikuteit, S, Stiller, G P, Bernath, P, Schrems, O, Kuellmann, H, Raspollini, P, Lambert, A, McConnell, J, kittippurath, J, Semeniuk, K, Toohey, M, Ridolfi, M, and Notholt, Justus
Abstract: The Atmospheric Chemistry Experiment (ACE), also known as SCISAT, was launched on 12 August 2003,carrying two instruments that measure vertical profiles of atmospheric constituents using the solar occultation technique.One of these instruments, the ACE Fourier Transform Spectrometer (ACE-FTS), is measuring volume mixing ratio profiles of nitrous oxide (N2O) from the upper troposphere to the lower mesosphere. In this study, the quality of the ACE-FTS version 2.2 N2O data is assessed rough comparisons with coincident measurements made by other satellite, balloon-borne, aircraft, and ground-based instruments.These consist of vertical profile comparisons with the SMR, MLS, and MIPAS satellite instruments, multiple aircraft flights of ASUR, and single balloon flights of SPIRALE and FIRS-2, and artial column comparisons with a network of ground-based Fourier Transform InfraRed spectrometers(FTIRs). Overall, the quality of the ACE-FTS version 2.2 N2O VMR profiles appears to be good over the entire altitude range from 5 to 60 km. Between 6 and 30 km, the meanabsolute differences for the satellite comparisons lie between -42 ppbv and +17 ppbv, with most within 20 ppbv, correspondingto relative deviations from the mean that are mostly within 5%. Between 18 and 30 km, the mean absolute differences are generally within 10 ppbv, with relative deviations from the mean within 20%, except for the aircraft and balloon comparisons. From 30 to 60 km, the mean absolute differences are within 4 ppbv, and are mostly between -2 and +1 ppbv. Given the small N2O VMR in this region, therelative deviations from the mean are therefore large at these altitudes, with most suggesting a negative bias in the ACEFTS data between 30 and 50 km. In the comparisons with the FTIRs, the mean relative differences between the ACE-FTS and FTIR partial columns are within 6.6% for eleven of thetwelve contributing stations. This mean relative difference is negative at eight stations, suggesting a small negative
Published: 2008

21. The High Arctic in Extreme Winters: Vortex, Temperature, and MLS and ACE-FTS Trace Gas Evolution

Author: Manney, G.L., Daffer, W., Strawbridge, K., Walker, K., Boone, C., Bernath, P., Kerzenmacher, T., Schwartz, M., Strong, K., Sica, R., Krüger, Kirstin, Pumphrey, H., Froidevaux, L., Lambert, A., Santee, M., Livesey, N., Remsberg, E., Mlynczak, M., Russell III, J., Manney, G.L., Daffer, W., Strawbridge, K., Walker, K., Boone, C., Bernath, P., Kerzenmacher, T., Schwartz, M., Strong, K., Sica, R., Krüger, Kirstin, Pumphrey, H., Froidevaux, L., Lambert, A., Santee, M., Livesey, N., Remsberg, E., Mlynczak, M., and Russell III, J.
Abstract: The first three Canadian Arctic Atmospheric Chemistry Experiment (ACE) Validation Campaigns at Eureka (80° N, 86° W) were during two extremes of Arctic winter variability: Stratospheric sudden warmings (SSWs) in 2004 and 2006 were among the strongest, most prolonged on record; 2005 was a record cold winter. New satellite measurements from ACE-Fourier Transform Spectrometer (ACE-FTS), Sounding of the Atmosphere using Broadband Emission Radiometry, and Aura Microwave Limb Sounder (MLS), with meteorological analyses and Eureka lidar and radiosonde temperatures, are used to detail the meteorology in these winters, to demonstrate its influence on transport and chemistry, and to provide a context for interpretation of campaign observations. During the 2004 and 2006 SSWs, the vortex broke down throughout the stratosphere, reformed quickly in the upper stratosphere, and remained weak in the middle and lower stratosphere. The stratopause reformed at very high altitude, above where it could be accurately represented in the meteorological analyses. The 2004 and 2006 Eureka campaigns were during the recovery from the SSWs, with the redeveloping vortex over Eureka. 2005 was the coldest winter on record in the lower stratosphere, but with an early final warming in mid-March. The vortex was over Eureka at the start of the 2005 campaign, but moved away as it broke up. Disparate temperature profile structure and vortex evolution resulted in much lower (higher) temperatures in the upper (lower) stratosphere in 2004 and 2006 than in 2005. Satellite temperatures agree well with Eureka radiosondes, and with lidar data up to 50–60 km. Consistent with a strong, cold upper stratospheric vortex and enhanced radiative cooling after the SSWs, MLS and ACE-FTS trace gas measurements show strongly enhanced descent in the upper stratospheric vortex during the 2004 and 2006 Eureka campaigns compared to that in 2005.
Published: 2008

22. Geophysical validation of MIPAS-ENVISAT operational ozone data

Author: Cortesi, U, Lambert, J C, De Clercq, C, Bianchini, G., Blumenstock, T, Bracher, A., Castelli, E., Catoire, V., Chance, K. V., De Maziere, M., Demoulin, P., Godin-Beekmann, S., Jones, N. B., Jucks, K., Keim, C., Kerzenmacher, T., Kuellmann, H., Kuttippurath, J., Iarlori, M., Liu, G. Y., Liu, Y., McDermid, I. S., Meijer, Y. J., Mencaraglia, F., Mikuteit, S., Oelhaf, H., Piccolo, C., Pirre, M., Raspollini, P., Ravegnani, F., Reburn, W. J., Redaelli, G., Remedios, J. J., Sembhi, H., Smale, D., Steck, T., Taddei, A., Varotsos, C., Vigouroux, C., Waterfall, A., Wetzel, G., Wood, S., Cortesi, U, Lambert, J C, De Clercq, C, Bianchini, G., Blumenstock, T, Bracher, A., Castelli, E., Catoire, V., Chance, K. V., De Maziere, M., Demoulin, P., Godin-Beekmann, S., Jones, N. B., Jucks, K., Keim, C., Kerzenmacher, T., Kuellmann, H., Kuttippurath, J., Iarlori, M., Liu, G. Y., Liu, Y., McDermid, I. S., Meijer, Y. J., Mencaraglia, F., Mikuteit, S., Oelhaf, H., Piccolo, C., Pirre, M., Raspollini, P., Ravegnani, F., Reburn, W. J., Redaelli, G., Remedios, J. J., Sembhi, H., Smale, D., Steck, T., Taddei, A., Varotsos, C., Vigouroux, C., Waterfall, A., Wetzel, G., and Wood, S.
Abstract: The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), on-board the European ENVIronmental SATellite (ENVISAT) launched on 1 March 2002, is a middle infrared Fourier Transform spectrometer measuring the atmospheric emission spectrum in limb sounding geometry. The instrument is capable to retrieve the vertical distribution of temperature and trace gases, aiming at the study of climate and atmospheric chemistry and dynamics, and at applications to data assimilation and weather forecasting.
Published: 2007

23. Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O

Author: Dils, B, De Maziere, M, Muller, J F, Blumenstock, T, Jones, Nicholas B, Griffith, David W, Rinsland, C P, Mahieu, E, Wood, S, de Beek, R, Demoulin, P, Buchwitz, M, Duchatelet, P, Frankenberg, C, Gloudemans, A, Kerzenmacher, T, Kramer, I, Mellqvist, J, Shrijver, H, Strandberg, A, Smale, D, Stremme, W, Straume, A G, Sussmann, R, van den Broek, M, Wagner, T, Strong, K, Wiacek, Aldona, Taylor, J R, Fast, Hans, Warneke, Thorsten, MITTERMEIER, Richard L, Notholt, Justus, Velazco, Voltaire A, Dils, B, De Maziere, M, Muller, J F, Blumenstock, T, Jones, Nicholas B, Griffith, David W, Rinsland, C P, Mahieu, E, Wood, S, de Beek, R, Demoulin, P, Buchwitz, M, Duchatelet, P, Frankenberg, C, Gloudemans, A, Kerzenmacher, T, Kramer, I, Mellqvist, J, Shrijver, H, Strandberg, A, Smale, D, Stremme, W, Straume, A G, Sussmann, R, van den Broek, M, Wagner, T, Strong, K, Wiacek, Aldona, Taylor, J R, Fast, Hans, Warneke, Thorsten, MITTERMEIER, Richard L, Notholt, Justus, and Velazco, Voltaire A
Abstract: Total column amounts of CO, CH4, CO2 and N2O retrieved from SCIAMACHY nadir observations in its near-infrared channels have been compared to data from a ground-based quasi-global network of Fourier-transform infrared (FTIR) spectrometers. The SCIAMACHY data considered here have been produced by three different retrieval algorithms, WFM-DOAS (version 0.5 for CO and CH4 and version 0.4 for CO2 and N2O), IMAP-DOAS (version 1.1 and 0.9 (for CO)) and IMLM (version 6.3) and cover the January to December 2003 time period. Comparisons have been made for individual data, as well as for monthly averages. To maximize the number of reliable coincidences that satisfy the temporal and spatial collocation criteria, the SCIAMACHY data have been compared with a temporal 3rd order polynomial interpolation of the ground-based data. Particular attention has been given to the question whether SCIAMACHY observes correctly the seasonal and latitudinal variability of the target species. The present results indicate that the individual SCIAMACHY data obtained with the actual versions of the algorithms have been significantly improved, but that the quality requirements, for estimating emissions on regional scales, are not yet met. Nevertheless, possible directions for further algorithm upgrades have been identified which should result in more reliable data products in a near future.
Published: 2006

24. Retrieval of volcanic ash and ice cloud physical properties together with gas concentration from IASI measurements using the AVL model

Author: Kochenova, S., primary, De Mazière, M., additional, Kumps, N., additional, Vandenbussche, S., additional, and Kerzenmacher, T., additional
Published: 2013
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25. Validation of IASI FORLI carbon monoxide retrievals using FTIR data from NDACC

Author: Kerzenmacher, T., primary, Dils, B., additional, Kumps, N., additional, Blumenstock, T., additional, Clerbaux, C., additional, Coheur, P.-F., additional, Demoulin, P., additional, García, O., additional, George, M., additional, Griffith, D. W. T., additional, Hase, F., additional, Hadji-Lazaro, J., additional, Hurtmans, D., additional, Jones, N., additional, Mahieu, E., additional, Notholt, J., additional, Paton-Walsh, C., additional, Raffalski, U., additional, Ridder, T., additional, Schneider, M., additional, Servais, C., additional, and De Mazière, M., additional
Published: 2012
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26. A global inventory of stratospheric NOyfrom ACE-FTS

Author: Jones, A., primary, Qin, G., additional, Strong, K., additional, Walker, Kaley A., additional, McLinden, C. A., additional, Toohey, M., additional, Kerzenmacher, T., additional, Bernath, P. F., additional, and Boone, C. D., additional
Published: 2011
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27. Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Author: Dupuy, E., primary, Walker, K. A., additional, Kar, J., additional, Boone, C. D., additional, McElroy, C. T., additional, Bernath, P. F., additional, Drummond, J. R., additional, Skelton, R., additional, McLeod, S. D., additional, Hughes, R. C., additional, Nowlan, C. R., additional, Dufour, D. G., additional, Zou, J., additional, Nichitiu, F., additional, Strong, K., additional, Baron, P., additional, Bevilacqua, R. M., additional, Blumenstock, T., additional, Bodeker, G. E., additional, Borsdorff, T., additional, Bourassa, A. E., additional, Bovensmann, H., additional, Boyd, I. S., additional, Bracher, A., additional, Brogniez, C., additional, Burrows, J. P., additional, Catoire, V., additional, Ceccherini, S., additional, Chabrillat, S., additional, Christensen, T., additional, Coffey, M. T., additional, Cortesi, U., additional, Davies, J., additional, De Clercq, C., additional, Degenstein, D. A., additional, De Mazière, M., additional, Demoulin, P., additional, Dodion, J., additional, Firanski, B., additional, Fischer, H., additional, Forbes, G., additional, Froidevaux, L., additional, Fussen, D., additional, Gerard, P., additional, Godin-Beekmann, S., additional, Goutail, F., additional, Granville, J., additional, Griffith, D., additional, Haley, C. S., additional, Hannigan, J. W., additional, Höpfner, M., additional, Jin, J. J., additional, Jones, A., additional, Jones, N. B., additional, Jucks, K., additional, Kagawa, A., additional, Kasai, Y., additional, Kerzenmacher, T. E., additional, Kleinböhl, A., additional, Klekociuk, A. R., additional, Kramer, I., additional, Küllmann, H., additional, Kuttippurath, J., additional, Kyrölä, E., additional, Lambert, J.-C., additional, Livesey, N. J., additional, Llewellyn, E. J., additional, Lloyd, N. D., additional, Mahieu, E., additional, Manney, G. L., additional, Marshall, B. T., additional, McConnell, J. C., additional, McCormick, M. P., additional, McDermid, I. S., additional, McHugh, M., additional, McLinden, C. A., additional, Mellqvist, J., additional, Mizutani, K., additional, Murayama, Y., additional, Murtagh, D. P., additional, Oelhaf, H., additional, Parrish, A., additional, Petelina, S. V., additional, Piccolo, C., additional, Pommereau, J.-P., additional, Randall, C. E., additional, Robert, C., additional, Roth, C., additional, Schneider, M., additional, Senten, C., additional, Steck, T., additional, Strandberg, A., additional, Strawbridge, K. B., additional, Sussmann, R., additional, Swart, D. P. J., additional, Tarasick, D. W., additional, Taylor, J. R., additional, Tétard, C., additional, Thomason, L. W., additional, Thompson, A. M., additional, Tully, M. B., additional, Urban, J., additional, Vanhellemont, F., additional, Vigouroux, C., additional, von Clarmann, T., additional, von der Gathen, P., additional, von Savigny, C., additional, Waters, J. W., additional, Witte, J. C., additional, Wolff, M., additional, and Zawodny, J. M., additional
Published: 2009
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28. Validation of NO2 and NO from the Atmospheric Chemistry Experiment (ACE)

Author: Kerzenmacher, T., primary, Wolff, M. A., additional, Strong, K., additional, Dupuy, E., additional, Walker, K. A., additional, Amekudzi, L. K., additional, Batchelor, R. L., additional, Bernath, P. F., additional, Berthet, G., additional, Blumenstock, T., additional, Boone, C. D., additional, Bramstedt, K., additional, Brogniez, C., additional, Brohede, S., additional, Burrows, J. P., additional, Catoire, V., additional, Dodion, J., additional, Drummond, J. R., additional, Dufour, D. G., additional, Funke, B., additional, Fussen, D., additional, Goutail, F., additional, Griffith, D. W. T., additional, Haley, C. S., additional, Hendrick, F., additional, Höpfner, M., additional, Huret, N., additional, Jones, N., additional, Kar, J., additional, Kramer, I., additional, Llewellyn, E. J., additional, López-Puertas, M., additional, Manney, G., additional, McElroy, C. T., additional, McLinden, C. A., additional, Melo, S., additional, Mikuteit, S., additional, Murtagh, D., additional, Nichitiu, F., additional, Notholt, J., additional, Nowlan, C., additional, Piccolo, C., additional, Pommereau, J.-P., additional, Randall, C., additional, Raspollini, P., additional, Ridolfi, M., additional, Richter, A., additional, Schneider, M., additional, Schrems, O., additional, Silicani, M., additional, Stiller, G. P., additional, Taylor, J., additional, Tétard, C., additional, Toohey, M., additional, Vanhellemont, F., additional, Warneke, T., additional, Zawodny, J. M., additional, and Zou, J., additional
Published: 2008
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29. Validation of ACE-FTS N2O measurements

Author: Strong, K., primary, Wolff, M. A., additional, Kerzenmacher, T. E., additional, Walker, K. A., additional, Bernath, P. F., additional, Blumenstock, T., additional, Boone, C., additional, Catoire, V., additional, Coffey, M., additional, De Mazière, M., additional, Demoulin, P., additional, Duchatelet, P., additional, Dupuy, E., additional, Hannigan, J., additional, Höpfner, M., additional, Glatthor, N., additional, Griffith, D. W. T., additional, Jin, J. J., additional, Jones, N., additional, Jucks, K., additional, Kuellmann, H., additional, Kuttippurath, J., additional, Lambert, A., additional, Mahieu, E., additional, McConnell, J. C., additional, Mellqvist, J., additional, Mikuteit, S., additional, Murtagh, D. P., additional, Notholt, J., additional, Piccolo, C., additional, Raspollini, P., additional, Ridolfi, M., additional, Robert, C., additional, Schneider, M., additional, Schrems, O., additional, Semeniuk, K., additional, Senten, C., additional, Stiller, G. P., additional, Strandberg, A., additional, Taylor, J., additional, Tétard, C., additional, Toohey, M., additional, Urban, J., additional, Warneke, T., additional, and Wood, S., additional
Published: 2008
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30. Intercomparison of UV-visible measurements of ozone and NO2 during the Canadian Arctic ACE validation campaigns: 2004–2006

Author: Fraser, A., primary, Goutail, F., additional, Strong, K., additional, Bernath, P. F., additional, Boone, C., additional, Daffer, W. H., additional, Drummond, J. R., additional, Dufour, D. G., additional, Kerzenmacher, T. E., additional, Manney, G. L., additional, McElroy, C. T., additional, Midwinter, C., additional, McLinden, C. A., additional, Nichitiu, F., additional, Nowlan, C. R., additional, Walker, J., additional, Walker, K. A., additional, Wu, H., additional, and Zou, J., additional
Published: 2008
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31. Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Author: Dupuy, E., primary, Walker, K. A., additional, Kar, J., additional, Boone, C. D., additional, McElroy, C. T., additional, Bernath, P. F., additional, Drummond, J. R., additional, Skelton, R., additional, McLeod, S. D., additional, Hughes, R. C., additional, Nowlan, C. R., additional, Dufour, D. G., additional, Zou, J., additional, Nichitiu, F., additional, Strong, K., additional, Baron, P., additional, Bevilacqua, R. M., additional, Blumenstock, T., additional, Bodeker, G. E., additional, Borsdorff, T., additional, Bourassa, A. E., additional, Bovensmann, H., additional, Boyd, I. S., additional, Bracher, A., additional, Brogniez, C., additional, Burrows, J. P., additional, Catoire, V., additional, Ceccherini, S., additional, Chabrillat, S., additional, Christensen, T., additional, Coffey, M. T., additional, Cortesi, U., additional, Davies, J., additional, De Clercq, C., additional, Degenstein, D. A., additional, De Mazière, M., additional, Demoulin, P., additional, Dodion, J., additional, Firanski, B., additional, Fischer, H., additional, Forbes, G., additional, Froidevaux, L., additional, Fussen, D., additional, Gerard, P., additional, Godin-Beekman, S., additional, Goutail, F., additional, Granville, J., additional, Griffith, D., additional, Haley, C. S., additional, Hannigan, J. W., additional, Höpfner, M., additional, Jin, J. J., additional, Jones, A., additional, Jones, N. B., additional, Jucks, K., additional, Kagawa, A., additional, Kasai, Y., additional, Kerzenmacher, T. E., additional, Kleinböhl, A., additional, Klekociuk, A. R., additional, Kramer, I., additional, Küllmann, H., additional, Kuttippurath, J., additional, Kyrölä, E., additional, Lambert, J.-C., additional, Livesey, N. J., additional, Llewellyn, E. J., additional, Lloyd, N. D., additional, Mahieu, E., additional, Manney, G. L., additional, Marshall, B. T., additional, McConnell, J. C., additional, McCormick, M. P., additional, McDermid, I. S., additional, McHugh, M., additional, McLinden, C. A., additional, Mellqvist, J., additional, Mizutani, K., additional, Murayama, Y., additional, Murtagh, D. P., additional, Oelhaf, H., additional, Parrish, A., additional, Petelina, S. V., additional, Piccolo, C., additional, Pommereau, J.-P., additional, Randall, C. E., additional, Robert, C., additional, Roth, C., additional, Schneider, M., additional, Senten, C., additional, Steck, T., additional, Strandberg, A., additional, Strawbridge, K. B., additional, Sussmann, R., additional, Swart, D. P. J., additional, Tarasick, D. W., additional, Taylor, J. R., additional, Tétard, C., additional, Thomason, L. W., additional, Thompson, A. M., additional, Tully, M. B., additional, Urban, J., additional, Vanhellemont, F., additional, von Clarmann, T., additional, von der Gathen, P., additional, von Savigny, C., additional, Waters, J. W., additional, Witte, J. C., additional, Wolff, M., additional, and Zawodny, J. M., additional
Published: 2008
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32. Validation of HNO3, ClONO2, and N2O5 from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

Author: Wolff, M. A., primary, Kerzenmacher, T., additional, Strong, K., additional, Walker, K. A., additional, Toohey, M., additional, Dupuy, E., additional, Bernath, P. F., additional, Boone, C. D., additional, Brohede, S., additional, Catoire, V., additional, von Clarmann, T., additional, Coffey, M., additional, Daffer, W. H., additional, De Mazière, M., additional, Duchatelet, P., additional, Glatthor, N., additional, Griffith, D. W. T., additional, Hannigan, J., additional, Hase, F., additional, Höpfner, M., additional, Huret, N., additional, Jones, N., additional, Jucks, K., additional, Kagawa, A., additional, Kasai, Y., additional, Kramer, I., additional, Küllmann, H., additional, Kuttippurath, J., additional, Mahieu, E., additional, Manney, G., additional, McLinden, C., additional, Mébarki, Y., additional, Mikuteit, S., additional, Murtagh, D., additional, Piccolo, C., additional, Raspollini, P., additional, Ridolfi, M., additional, Ruhnke, R., additional, Santee, M., additional, Senten, C., additional, Smale, D., additional, Tétard, C., additional, Urban, J., additional, and Wood, S., additional
Published: 2008
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33. The high Arctic in extreme winters: vortex, temperature, and MLS and ACE-FTS trace gas evolution

Author: Manney, G. L., primary, Daffer, W. H., additional, Strawbridge, K. B., additional, Walker, K. A., additional, Boone, C. D., additional, Bernath, P. F., additional, Kerzenmacher, T., additional, Schwartz, M. J., additional, Strong, K., additional, Sica, R. J., additional, Krüger, K., additional, Pumphrey, H. C., additional, Lambert, A., additional, Santee, M. L., additional, Livesey, N. J., additional, Remsberg, E. E., additional, Mlynczak, M. G., additional, and Russell III, J. R., additional
Published: 2008
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34. Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements

Author: Sica, R. J., primary, Izawa, M. R. M., additional, Walker, K. A., additional, Boone, C., additional, Petelina, S. V., additional, Argall, P. S., additional, Bernath, P., additional, Burns, G. B., additional, Catoire, V., additional, Collins, R. L., additional, Daffer, W. H., additional, De Clercq, C., additional, Fan, Z. Y., additional, Firanski, B. J., additional, French, W. J. R., additional, Gerard, P., additional, Gerding, M., additional, Granville, J., additional, Innis, J. L., additional, Keckhut, P., additional, Kerzenmacher, T., additional, Klekociuk, A. R., additional, Kyrö, E., additional, Lambert, J. C., additional, Llewellyn, E. J., additional, Manney, G. L., additional, McDermid, I. S., additional, Mizutani, K., additional, Murayama, Y., additional, Piccolo, C., additional, Raspollini, P., additional, Ridolfi, M., additional, Robert, C., additional, Steinbrecht, W., additional, Strawbridge, K. B., additional, Strong, K., additional, Stübi, R., additional, and Thurairajah, B., additional
Published: 2008
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35. Intercomparison of UV-visible measurements of ozone and NO2 during the Canadian Arctic ACE validation campaigns: 2004–2006

Author: Fraser, A., primary, Goutail, F., additional, Strong, K., additional, Bernath, P. F., additional, Boone, C., additional, Daffer, W. H., additional, Drummond, J. R., additional, Dufour, D. G., additional, Kerzenmacher, T. E., additional, Manney, G. L., additional, McElroy, C. T., additional, Midwinter, C., additional, McLinden, C. A., additional, Nichitiu, F., additional, Nowlan, C. R., additional, Walker, J., additional, Walker, K. A., additional, Wu, H., additional, and Zou, J., additional
Published: 2007
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36. Geophysical validation of MIPAS-ENVISAT operational ozone data

Author: Cortesi, U., primary, Lambert, J. C., additional, De Clercq, C., additional, Bianchini, G., additional, Blumenstock, T., additional, Bracher, A., additional, Castelli, E., additional, Catoire, V., additional, Chance, K. V., additional, De Mazière, M., additional, Demoulin, P., additional, Godin-Beekmann, S., additional, Jones, N., additional, Jucks, K., additional, Keim, C., additional, Kerzenmacher, T., additional, Kuellmann, H., additional, Kuttippurath, J., additional, Iarlori, M., additional, Liu, G. Y., additional, Liu, Y., additional, McDermid, I. S., additional, Meijer, Y. J., additional, Mencaraglia, F., additional, Mikuteit, S., additional, Oelhaf, H., additional, Piccolo, C., additional, Pirre, M., additional, Raspollini, P., additional, Ravegnani, F., additional, Reburn, W. J., additional, Redaelli, G., additional, Remedios, J. J., additional, Sembhi, H., additional, Smale, D., additional, Steck, T., additional, Taddei, A., additional, Varotsos, C., additional, Vigouroux, C., additional, Waterfall, A., additional, Wetzel, G., additional, and Wood, S., additional
Published: 2007
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37. Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements

Author: Sica, R. J., primary, Izawa, M. R. M., additional, Walker, K. A., additional, Boone, C., additional, Petelina, S. V., additional, Argall, P. S., additional, Bernath, P., additional, Burns, G. B., additional, Catoire, V., additional, Collins, R. L., additional, Daffer, W. H., additional, De Clercq, C., additional, Fan, Z. Y., additional, Firanski, B. J., additional, French, W. J. R., additional, Gerard, P., additional, Gerding, M., additional, Granville, J., additional, Innis, J. L., additional, Keckhut, P., additional, Kerzenmacher, T., additional, Klekociuk, A. R., additional, Kyrö, E., additional, Lambert, J. C., additional, Llewellyn, E. J., additional, Manney, G. L., additional, McDermid, I. S., additional, Mizutani, K., additional, Murayama, Y., additional, Piccolo, C., additional, Raspollini, P., additional, Ridolfi, M., additional, Robert, C., additional, Steinbrecht, W., additional, Strawbridge, K. B., additional, Strong, K., additional, Stübi, R., additional, and Thurairajah, B., additional
Published: 2007
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38. The high Arctic in extreme winters: vortex, temperature, and MLS and ACE-FTS trace gas evolution

Author: Manney, G. L., primary, Daffer, W. H., additional, Strawbridge, K. B., additional, Walker, K. A., additional, Boone, C. D., additional, Bernath, P. F., additional, Kerzenmacher, T., additional, Schwartz, M. J., additional, Strong, K., additional, Sica, R. J., additional, Krüger, K., additional, Pumphrey, H. C., additional, Froidevaux, L., additional, Lambert, A., additional, Santee, M. L., additional, Livesey, N. J., additional, Remsberg, E. E., additional, Mlynczak, M. G., additional, and Russell III, J. R., additional
Published: 2007
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39. Intercomparison of ground-based ozone and NO2 measurements during the MANTRA 2004 campaign

Author: Fraser, A., primary, Bernath, P. F., additional, Blatherwick, R. D., additional, Drummond, J. R., additional, Fogal, P. F., additional, Fu, D., additional, Goutail, F., additional, Kerzenmacher, T. E., additional, McElroy, C. T., additional, Midwinter, C., additional, Olson, J. R., additional, Strong, K., additional, Walker, K. A., additional, Wunch, D., additional, and Young, I. J., additional
Published: 2007
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40. Ground-Based Solar Absorption FTIR Spectroscopy: Characterization of Retrievals and First Results from a Novel Optical Design Instrument at a New NDACC Complementary Station

Author: Wiacek, A., primary, Taylor, J. R., primary, Strong, K., primary, Saari, R., primary, Kerzenmacher, T. E., primary, Jones, N. B., additional, and Griffith, D. W. T., additional
Published: 2007
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41. Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O

Author: Dils, B., primary, De Mazière, M., additional, Müller, J. F., additional, Blumenstock, T., additional, Buchwitz, M., additional, de Beek, R., additional, Demoulin, P., additional, Duchatelet, P., additional, Fast, H., additional, Frankenberg, C., additional, Gloudemans, A., additional, Griffith, D., additional, Jones, N., additional, Kerzenmacher, T., additional, Kramer, I., additional, Mahieu, E., additional, Mellqvist, J., additional, Mittermeier, R. L., additional, Notholt, J., additional, Rinsland, C. P., additional, Schrijver, H., additional, Smale, D., additional, Strandberg, A., additional, Straume, A. G., additional, Stremme, W., additional, Strong, K., additional, Sussmann, R., additional, Taylor, J., additional, van den Broek, M., additional, Velazco, V., additional, Wagner, T., additional, Warneke, T., additional, Wiacek, A., additional, and Wood, S., additional
Published: 2006
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42. Retrieval of volcanic ash and ice cloud physical properties together with gas concentration from IASI measurements using the AVL model.

Author: Kochenova, S., De Mazière, M., Kumps, N., Vandenbussche, S., and Kerzenmacher, T.
Subjects: VOLCANIC ash, tuff, etc., ICE clouds, PARTICLE size distribution, ATMOSPHERIC aerosols, VOLCANIC eruptions, INTERFEROMETERS, RADIATIVE transfer, ATMOSPHERIC models
Abstract: Observation and tracking of volcanic aerosols are important for preventing possible aviation hazards and determining the influence of aerosols on climate. The useful information primary includes the concentration, particle size and altitude of aerosol load. Moreover, volcanic eruptions are usually accompanied by strong emissions of SO2 and enhanced concentrations of H2O in the atmosphere. Volcanic ash particles can also catalyze the formation of ice clouds by serving as cloud nuclei. Hyperspectral infrared sounders, such as IASI (Infrared Atmospheric Sounding Interferometer), have proven to be powerful tools for capturing volcanic aerosol and ice cloud signatures and enhanced volcanic gas concentrations. Information on atmospheric constituents is extracted from such hyperspectral measurements with the help of radiative transfer (RT) codes capable of solving both direct and inverse RT problems. We will demonstrate the retrieval of aerosol and ice cloud physical properties together with gas concentration from IASI measurements with the help of the AVL RT model. AVL is one of the 'code combination packages' which are becoming more and more popular in the scientific domain. It consists of several codes, each of which handles a specific set of physics-related tasks. The codes function smoothly as a whole due to the use of a special interface. AVL is perfectly suitable (i) to model the propagation of UV-visible-IR radiation through a coupled atmosphere-surface system for a wide range of atmospheric, spectral and geometrical conditions; and (ii) to retrieve vertical gas profiles and aerosol concentration through the use of its embedded retrieval algorithm on the basis of an optimal estimation method (OEM). The retrievals are performed for IASI measurements (radiance, Level 1C product) carried out over Eyjafjallajo¨kull volcano, Iceland, in April 2010. [ABSTRACT FROM AUTHOR]
Published: 2013
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43. Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O

Author: Dils, B., primary, De Mazière, M., additional, Blumenstock, T., additional, Buchwitz, M., additional, de Beek, R., additional, Demoulin, P., additional, Duchatelet, P., additional, Fast, H., additional, Frankenberg, C., additional, Gloudemans, A., additional, Griffith, D., additional, Jones, N., additional, Kerzenmacher, T., additional, Kramer, I., additional, Mahieu, E., additional, Mellqvist, J., additional, Mittermeier, R. L., additional, Notholt, J., additional, Rinsland, C. P., additional, Schrijver, H., additional, Smale, D., additional, Strandberg, A., additional, Straume, A. G., additional, Stremme, W., additional, Strong, K., additional, Sussmann, R., additional, Taylor, J., additional, van den Broek, M., additional, Wagner, T., additional, Warneke, T., additional, Wiacek, A., additional, and Wood, S., additional
Published: 2005
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44. A global inventory of stratospheric NO y from ACE-FTS.

Author: Jones, A., Qin, G., Strong, K., Walker, Kaley A., McLinden, C. A., Toohey, M., Kerzenmacher, T., Bernath, P. F., and Boone, C. D.
Published: 2011
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45. Validation of NO2 and NO from the Atmospheric Chemistry Experiment (ACE).

Author: Kerzenmacher, T., Wolff, M. A., Strong, K., Dupuy, E., Walker, K. A., Amekudzi, L. K., Batchelor, R. L., Bernath, P. F., Berthet, G., Blumenstock, T., Boone, C. D., Bramstedt, K., Brogniez, C., Brohede, S., Burrows, J. P., Catoire, V., Dodion, J., Drummond, J. R., Dufour, D. G., and Funke, B.
Subjects: ATMOSPHERIC chemistry, SCIENTIFIC apparatus & instruments, SCIENTIFIC observation, SPECTROMETERS, MEASUREMENT
Abstract: Vertical profiles of NO2 and NO have been obtained from solar occultation measurements by the Atmospheric Chemistry Experiment (ACE), using an infrared Fourier Transform Spectrometer (ACE-FTS) and (for NO2) an ultraviolet-visible-near-infrared spectrometer, MAESTRO (Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation). In this paper, the quality of the ACE-FTS version 2.2 NO2 and NO and the MAESTRO version 1.2 NO2 data are assessed using other solar occultation measurements (HALOE, SAGE II, SAGEIII, POAMIII, SCIAMACHY), stellar occultation measurements (GOMOS), limb measurements (MIPAS, OSIRIS), nadir measurements (SCIAMACHY), balloon-borne measurements (SPIRALE, SAOZ) and ground-based measurements (UV-VIS, FTIR). Time differences between the comparison measurements were reduced using either a tight coincidence criterion, or where possible, chemical box models. ACE-FTS NO2 and NO and the MAESTRO NO2 are generally consistent with the correlative data. The ACE-FTS and MAESTRO NO2 volume mixing ratio (VMR) profiles agree with the profiles from other satellite data sets to within about 20% between 25 and 40 km, with the exception of MIPAS ESA (for ACE-FTS) and SAGEII (for ACE-FTS (sunrise) and MAESTRO) and suggest a negative bias between 23 and 40 km of about 10%. MAESTRO reports larger VMR values than the ACE-FTS. In comparisons with HALOE, ACE-FTS NO VMRs typically (on average) agree to ±8% from 22 to 64 km and to +10% from 93 to 105 km, with maxima of 21% and 36%, respectively. Partial column comparisons for NO2 show that there is quite good agreement between the ACE instruments and the FTIRs, with a mean difference of +7.3% for ACEFTS and +12.8% for MAESTRO. [ABSTRACT FROM AUTHOR]
Published: 2008
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46. Validation of ACE-FTS N2O measurements.

Author: Strong, K., Wolff, M. A., Kerzenmacher, T. E., Walker, K. A., Bernath, P. F., Blumenstock, T., Boone, C., Catoire, V., Coffey, M., De Mazière, M., Demoulin, P., Duchatelet, P., Dupuy, E., Hannigan, J., Höpfner, M., Glatthor, N., Griffith, D. W. T., Jin, J. J., Jones, N., and Jucks, K.
Subjects: TELECOMMUNICATION satellites, SPECTROMETERS, NITROGEN oxides, NITROUS oxide, SPECTRUM analysis instruments, MASS spectrometers
Abstract: The Atmospheric Chemistry Experiment (ACE), also known as SCISAT, was launched on 12 August 2003, carrying two instruments that measure vertical profiles of atmospheric constituents using the solar occultation technique. One of these instruments, the ACE Fourier Transform Spectrometer (ACE-FTS), is measuring volume mixing ratio (VMR) profiles of nitrous oxide (N2O) from the upper troposphere to the lower mesosphere at a vertical resolution of about 3-4 km. In this study, the quality of the ACE-FTS version 2.2 N2O data is assessed through comparisons with coincident measurements made by other satellite, balloonborne, aircraft, and ground-based instruments. These consist of vertical profile comparisons with the SMR, MLS, and MIPAS satellite instruments, multiple aircraft flights of ASUR, and single balloon flights of SPIRALE and FIRS-2, and partial column comparisons with a network of groundbased Fourier Transform InfraRed spectrometers (FTIRs). Between 6 and 30 km, the mean absolute differences for the satellite comparisons lie between -42 ppbv and +17 ppbv, with most within ±20 ppbv. This corresponds to relative deviations from the mean that are within ±15%, except for comparisons with MIPAS near 30 km, for which they are as large as 22.5%. Between 18 and 30 km, the mean absolute differences for the satellite comparisons are generally within ±10 ppbv. From 30 to 60 km, the mean absolute differences are within ±4 ppbv, and are mostly between -2 and +1 ppbv. Given the small N2O VMR in this region, the relative deviations from the mean are therefore large at these altitudes, with most suggesting a negative bias in the ACE-FTS data between 30 and 50 km. In the comparisons with the FTIRs, the mean relative differences between the ACE-FTS and FTIR partial columns (which cover a mean altitude range of 14 to 27 km) are within ±5.6% for eleven of the twelve contributing stations. This mean relative difference is negative at ten stations, suggesting a small negative bias in the ACE-FTS partial columns over the altitude regions compared. Excellent correlation (R=0.964) is observed between the ACE-FTS and FTIR partial columns, with a slope of 1.01 and an intercept of -0.20 on the line fitted to the data. [ABSTRACT FROM AUTHOR]
Published: 2008
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47. Validation of HNO3, ClONO2, and N2O5 from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS).

Author: Wolff, M. A., Kerzenmacher, T., Strong, K., Walker, K. A., Toohey, M., Dupuy, E., Bernath, P. F., Boone, C. D., Brohede, S., Catoire, V., von Clarmann, T., Coffey, M., Daffer, w. H., De Mazière, M., Duchatelet, P., Glatthor, N., Griffith, D. W. T., Hannigan, J., Hase, F., and Höpfner, M.
Subjects: ATMOSPHERIC chemistry, SPHERICAL astronomy, SPECTROMETERS, ARTIFICIAL satellites, PHYSICAL geography, PHYSICAL & theoretical chemistry
Abstract: The Atmospheric Chemistry Experiment (ACE) satellite was launched on 12 August 2003. Its two instruments measure vertical profiles of over 30 atmospheric trace gases by analyzing solar occultation spectra in the ultraviolet/visible and infrared wavelength regions. The reservoir gases HNO3, ClONO2, and N2O5 are three of the key species provided by the primary instrument, the ACE Fourier Transform Spectrometer (ACE-FTS). This paper describes the ACE-FTS version 2.2 data products, including the N2O5 update, for the three species and presents validation comparisons with available observations. We have compared volume mixing ratio (VMR) profiles of HNO3, ClONO2, and N2O5 with measurements by other satellite instruments (SMR, MLS, MIPAS), aircraft measurements (ASUR), and single balloon-flights (SPIRALE, FIRS-2). Partial columns of HNO3 and ClONO2 were also compared with measurements by ground-based Fourier Transform Infrared (FTIR) spectrometers. Overall the quality of the ACE-FTS v2.2 HNO3 VMR profiles is good from 18 to 35 km. For the statistical satellite comparisons, the mean absolute differences are generally within ±1 ppbv (±20%) from 18 to 35 km. For MIPAS and MLS comparisons only, mean relative differences lie within ±10% between 10 and 36 km. ACE-FTS HNO3 partial columns (∼15-30 km) show a slight negative bias of -1.3% relative to the ground-based FTIRs at latitudes ranging from 77.8° S-76.5° N. Good agreement between ACEFTS ClONO2 and MIPAS, using the Institut für Meteorologie und Klimaforschung and Instituto de Astrofísica de Andalucía (IMK-IAA) data processor is seen. Mean absolute differences are typically within ±0.01 ppbv between 16 and 27 km and less than +0.09 ppbv between 27 and 34 km. The ClONO2 partial column comparisons show varying degrees of agreement, depending on the location and the quality of the FTIR measurements. Good agreement was found for the comparisons with the midlatitude Jungfraujoch partial columns for which the mean relative difference is 4.7%. ACE-FTS N2O5 has a low bias relative to MIPAS IMK-IAA, reaching -0.25 ppbv at the altitude of the N2O5 maximum (around 30 km). Mean absolute differences at lower altitudes (16-27 km) are typically -0.05 ppbv for MIPAS nighttime and ±0.02 ppbv for MIPAS daytime measurements. [ABSTRACT FROM AUTHOR]
Published: 2008
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48. Intercomparison of UV-visible measurements of ozone and NO2 during the Canadian Arctic ACE validation campaigns: 2004-2006.

Author: Fraser, A., Goutail, F., Strong, K., Bernath, P. F., Boone, C., Daffer, W. H., Drummond, J. R., Dufour, D. G., Kerzenmacher, T. E., Manney, G. L., McElroy, C. T., Midwinter, C., McLinden, C. A., Nichitiu, F., Nowlan, C. R., Walker, J., Walker, K. A., Wu, H., and Zou, J.
Abstract: The first three Canadian Arctic ACE validation campaigns were held during polar sunrise at Eureka, Nunavut, Canada (80° N, 86° W) from 2004 to 2006 in support of validation of the ACE (Atmospheric Chemistry Experiment) satellite mission. Three or four 5 zenith-sky viewing UV-visible spectrometers have taken part in each of the three campaigns. The differential slant column densities and vertical column densities from these instruments have been compared following the methods of the UV-visible Working Group of the NDACC (Network for Detection of Atmospheric Composition Change). The instruments are found to partially agree within the required accuracies for both species, although both the vertical and slant column densities are more scattered than required. This might be expected given the spatial and temporal variability of the Arctic stratosphere in spring. The vertical column densities are also compared to integrated total columns from ozonesondes and integrated partial columns from the ACE-FTS (ACE-Fourier Transform Spectrometer) and ACE-MAESTRO (ACE-Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation) instruments on board ACE. For both species, the columns from the ground-based instruments and the ozonesondes are found to generally agree within their combined error bars. The ACE-FTS ozone partial columns and the ground-based total columns agree within 4.5%, averaged over the three campaigns. The ACE-MAESTRO ozone partial columns are generally smaller than those of the ground-based instruments, by an average of 9.9%, and are smaller than the ACE-FTS columns by an average of 14.4%. The ACE-FTS NO2 partial columns are an average of 13.4% smaller than the total columns from the ground-based instruments, as expected. The ACE-MAESTRO NO2 partial columns are larger than the total columns of the ground-based instruments by an average of 2.5% and larger than the partial columns of the ACE-FTS by an average of 15.5%. [ABSTRACT FROM AUTHOR]
Published: 2007
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49. Intercomparison of ground-based ozone and NO2 measurements during the MANTRA 2004 campaign.

Author: Fraser, A., Bernath, P. F., Blatherwick, R. D., Drummond, J. R., Fogal, P. F., Fu, D., Goutail, F., Kerzenmacher, T. E., McElroy, C. T., Midwinter, C., Olson, J. R., Strong, K., Walker, K. A., Wunch, D., and Young, I. J.
Subjects: OZONE, NITROGEN oxides, FOURIER transform spectroscopy, SPECTROMETERS
Abstract: The MANTRA (Middle Atmosphere Nitrogen TRend Assessment) 2004 campaign took place in Vanscoy, Saskatchewan, Canada (52° N, 107° W) from 3 August to 15 September, 2004. In support of the main balloon launch, a suite of five zenith-sky and direct-Sun-viewing UV-visible ground-based spectrometers was deployed, primarily measuring ozone and NO2 total columns. Three Fourier transform spectrometers (FTSs) that were part of the balloon payload also performed ground-based measurements of several species, including ozone. Ground-based measurements of ozone and NO2 differential slant column densities from the zenith-viewing UV-visible instruments are presented herein. They are found to partially agree within NDACC (Network for the Detection of Atmospheric Composition Change) standards for instruments certified for process studies and satellite validation. Vertical column densities of ozone from the zenith-sky UV-visible instruments, the FTSs, a Brewer spectrophotometer, and ozonesondes are compared, and found to agree within the combined error estimates of the instruments (15%). NO2 vertical column densities from two of the UVvisible instruments are compared, and are also found to agree within combined error (15%). [ABSTRACT FROM AUTHOR]
Published: 2007
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50. The high Arctic in extreme winters: vortex, temperature, and MLS and ACE-FTS trace gas evolution.

Author: Manney, G. L., Daffer, W. H., Strawbridge, K. B., Walker, K. A., Boone, C. D., Bernath, P. F., Kerzenmacher, T., Schwartz, M. J., Strong, K., Sica, R. J., Krüger, K., Pumphrey, H. C., Froidevaux, L., Lambert, A., Santee, M. L., Livesey, N. J., Remsberg, E. E., Mlynczak, M. G., and Russell III, J. R.
Abstract: The first three Canadian Arctic Atmospheric Chemistry Experiment (ACE) Validation Campaigns at Eureka (80° N, 86° W) were during two extremes of Arctic winter variability: Stratospheric sudden warmings (SSWs) in 2004 and 2006 were among the strongest, most prolonged on record; 2005 was a record cold winter. New satellite measurements from ACE-Fourier Transform Spectrometer (ACE-FTS), Sounding of the Atmosphere using Broadband Emission Radiometry, and Aura Microwave Limb Sounder (MLS), with meteorological analyses and Eureka lidar and radiosonde temperatures, are used to detail the meteorology in these winters, to demonstrate its influence on transport and chemistry, and to provide a context for interpretation of campaign observations. During the 2004 and 2006 SSWs, the vortex broke down throughout the stratosphere, reformed quickly in the upper stratosphere, and remained weak in the middle and lower stratosphere. The stratopause reformed at very high altitude, above where it could be accurately represented in the meteorological analyses. The 2004 and 2006 Eureka campaigns were during the recovery from the SSWs, with the redeveloping vortex over Eureka. 2005 was the coldest winter on record in the lower stratosphere, but with an early final warming in mid-March. The vortex was over Eureka at the start of the 2005 campaign, but moved away as it broke up. Disparate temperature profile structure and vortex evolution resulted in much lower (higher) temperatures in the upper (lower) stratosphere in 2004 and 2006 than in 2005. Satellite temperatures agree well with Eureka radiosondes, and with lidar data up to 50-60 km. Consistent with a strong, cold upper stratospheric vortex and enhanced radiative cooling after the SSWs, MLS and ACE-FTS trace gas measurements show strongly enhanced descent in the upper stratospheric vortex during the 2004 and 2006 Eureka campaigns compared to that in 2005. [ABSTRACT FROM AUTHOR]
Published: 2007
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