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Your search keyword '"Greg Bodeker"' showing total 3 results
Start Over Author "Greg Bodeker" Publisher american geophysical union
3 results on '"Greg Bodeker"'

1. Validation of 3 years of ozone measurements over Network for the Detection of Stratospheric Change station Lauder, New Zealand

Author

Greg Bodeker, Joop W. Hovenier, Daan Swart, I. S. Boyd, K. F. Boersma, Wim Hogervorst, Alan Parrish, J. B. Bergwerff, J.F. de Haan, Joseph M. Zawodny, B. J. Connor, E. J. Brinksma, J. J. Tsou, and Atoms, Molecules, Lasers

Subjects
Atmospheric Science, Dobson ozone spectrophotometer, Stratospheric Aerosol and Gas Experiment, Ozone, Ecology, Meteorology, Microwave radiometer, Absorption cross section, Paleontology, Soil Science, Forestry, Aquatic Science, Oceanography, Annual cycle, chemistry.chemical_compound, Geophysics, Lidar, chemistry, Space and Planetary Science, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), Environmental science, Stratosphere, Earth-Surface Processes, Water Science and Technology
Abstract

A large number of ozone profiles measured by using various methods (lidar, ozonesondes, microwave radiometer, and Stratospheric Aerosol and Gas Experiment II) over Lauder, New Zealand, between late 1994 and early 1998 are intercompared. These profiles are also used to validate a collocated Dobson spectrophotometer. Between March 1996 (August 1996 for sonde measurements) and January 1998, all instruments were operational and no instrument changes took place. The ozone number densities averaged over this period agreed within 5% in the 20- to 35-kin range. Between 12 and 20 kin, lidar and sonde results deviated by less than 8%, and lidar and SAGE II results deviated by less than 15%. The ozone column densities measured by the Dobson spectrophotometer agreed within 3% with the integrated ozone profiles. The various methods are discussed, and modifications are proposed. They comprise a decrease of the reported sonde altitudes of about 125 m (+50 m) to correct for the response time of the sonde's chemical solution, the use of more accurate molecular parameter values in the lidar algorithm, and a 2.5% decrease in SAGE II ozone densities. Improved agreement between the average ozone profiles to within 1.5% for lidar and sondes (20-35 kin) and within 2.5% for lidar and SAGE II (20-35 kin) is achieved. The Dobson results are found to be influenced by the annual cycle of the temperature profile through the altitude-averaged ozone absorption cross section, which has been assumed to be constant in the presented data but actually varies with an amplitude of 2% over Lauder.

Published
2000

2. OPAL: Network for the Detection of Stratospheric Change Ozone Profiler Assessment at Lauder, New Zealand. 2. Intercomparison of Revised Results

Author

E. J. Brinksma, T. J. McGee, F.T. Ormel, W. A. Matthews, J. J. Tsou, I. S. McDermid, Alan Parrish, I. S. Boyd, M. Gross, Greg Bodeker, Patrick Kimvilakani, D. P. J. Swart, B. J. Connor, Upendra N. Singh, J. B. Bergwerff, R. Farmer, and Atoms, Molecules, Lasers

Subjects
Atmospheric Science, Differential absorption, Ozone, Ecology, Meteorology, Nouvelle zelande, Microwave radiometer, Paleontology, Soil Science, Forestry, Aquatic Science, Oceanography, chemistry.chemical_compound, Geophysics, Lidar, chemistry, Space and Planetary Science, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), Environmental science, Stratosphere, Earth-Surface Processes, Water Science and Technology
Abstract

Following a blind intercomparison of ozone profiling instruments in the Network for the Detection of Stratospheric Change at Lauder, New Zealand, revisions to the analyses were made resulting in a new data set. This paper compares the revised results from two differential absorption lidars (RIVM and GSFC), a microwave radiometer (Millitech/LaRC), and electrochemical concentration cell (ECC) balloon sondes (NIWA). In general, the results are substantially improved compared to the earlier blind intercomparison. The level of agreement was similar both for single profiles and for the campaign average profile and was approximately 5% for the lidars and the sondes over the altitude range from 15 to 42 km (32 km for sondes). The revised microwave data show a bias of 5–10% high in the region from 22 to 42 km. Starting at 42 km, the lidar errors increase significantly, and comparisons of the microwave results were not possible above this altitude.

Published
1998

3. Validation of Aura Microwave Limb Sounder Ozone by ozonesonde and lidar measurements

Author

David W. Tarasick, Gert J. R. Coetzee, Hans Claude, P. Skrivankova, F. J. Schmidlin, Sophie Godin-Beekmann, Robert Jarnot, G. Zablocki, R. E. Cofield, Françoise Posny, B. Bojkov, I. S. McDermid, P. Viatte, Michael J. Schwartz, Yan Jiang, Greg Bodeker, R. A. Fuller, Lucien Froidevaux, H. Dier, Hennie Kelder, Nathaniel J. Livesey, Beverly J. Johnson, Thierry Leblanc, Giovanni Laneve, S. J. Oltmans, H. De Backer, Brian Knosp, Marc Allaart, M. C. Parrondos, William H. Daffer, René Stübi, Robert S. Harwood, Michael J. Newchurch, Signe B. Andersen, Gary A. Morris, P. C. Stek, William G. Read, Margarita Yela, Bertrand Calpini, Brian J. Drouin, N. P. Leme, Joe W. Waters, W. V. Snyder, Esko Kyrö, D. T. Cuddy, Gert König-Langlo, Anne M. Thompson, R. P. Thurstans, V. S. Perun, P. von der Gathen, Masatomo Fujiwara, P. A. Wagner, L. S. Fook, Alyn Lambert, John T. Merrill, Holger Vömel, Jonathan Davies, M. J. Filipiak, Valérie Thouret, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), NASA Goddard Space Flight Center (GSFC), 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), Institute of Atmospheric and Environmental Science [Edinburgh], University of Edinburgh, Royal Netherlands Meteorological Institute (KNMI), Danish Meteorological Institute (DMI), Lauder Atmospheric Research Station, National Institute of Water and Atmospheric Research [Auckland] (NIWA), Payerne Aerological Station, Federal Office of Meteorology and Climatology MeteoSwiss, Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), South African Weather Service (SAWS), Environment and Climate Change Canada, Institut Royal Météorologique de Belgique [Bruxelles] (IRM), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Graduate School of Environmental Science [Sapporo], Hokkaido University [Sapporo, Japan], NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Instituto Nacional de Pesquisas Espaciais (INPE), Ministério da Ciência, Tecnologia e Inovação, Finnish Meteorological Institute (FMI), Centro di Ricerca Progetto San Marco (CRPSM), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Malaysian Meteorological Department (MetMalaysia), Ministry of Science, Technology and Innovation [Malaysia] (MOSTI), Graduate School of Oceanography [Narragansett], University of Rhode Island (URI), Department of Physics and Astronomy [Valparaiso], Valparaiso University, Department of Atmospheric Science [Huntsville], University of Alabama in Huntsville (UAH), Instituto Nacional de Técnica Aeroespacial (INTA), Laboratoire de l'Atmosphère et des Cyclones (LACy), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, Czech Hydrometeorological Institute (CHMI), PennState Meteorology Department, Pennsylvania State University (Penn State), Penn State System-Penn State System, Laboratoire d'aérologie (LAERO), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, ozonesonde, 0211 other engineering and technologies, Soil Science, 02 engineering and technology, Aquatic Science, Oceanography, 01 natural sciences, MLS, Troposphere, chemistry.chemical_compound, Altitude, Geochemistry and Petrology, Ozone layer, Earth and Planetary Sciences (miscellaneous), Tropospheric ozone, Stratosphere, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, validation, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Ecology, Paleontology, Forestry, Microwave Limb Sounder, ozone, Geophysics, Lidar, chemistry, 13. Climate action, Space and Planetary Science, Climatology, Middle latitudes, Environmental science, Aura
Abstract

We present validation studies of MLS version 2.2 upper tropospheric and stratospheric ozone profiles using ozonesonde and lidar data as well as climatological data. Ozone measurements from over 60 ozonesonde stations worldwide and three lidar stations are compared with coincident MLS data. The MLS ozone stratospheric data between 150 and 3 hPa agree well with ozonesonde measurements, within 8% for the global average. MLS values at 215 hPa are biased high compared to ozonesondes by A`20% at middle to high latitude, although there is a lot of variability in this altitude region. Comparisons between MLS and ground-based lidar measurements from Mauna Loa, Hawaii, from the Table Mountain Facility, California, and from the Observatoire de Haute-Provence, France, give very good agreement, within A`5%, for the stratospheric values. The comparisons between MLS and the Table Mountain Facility tropospheric ozone lidar show that MLS data are biased high by A`30% at 215 hPa, consistent with that indicated by the ozonesonde data. We obtain better global average agreement between MLS and ozonesonde partial column values down to 215 hPa, although the average MLS values at low to middle latitudes are higher than the ozonesonde values by up to a few percent. MLS v2.2 ozone data agree better than the MLS v1.5 data with ozonesonde and lidar measurements. MLS tropical data show the wave one longitudinal pattern in the upper troposphere, with similarities to the average distribution from ozonesondes. High upper tropospheric ozone values are also observed by MLS in the tropical Pacific from June to November.

Published
2007

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