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172 results on '"Neuman, J. Andrew"'

1. Rapid cloud removal of dimethyl sulfide oxidation products limits SO2 and cloud condensation nuclei production in the marine atmosphere.

Author

Novak, Gordon A, Fite, Charles H, Holmes, Christopher D, Veres, Patrick R, Neuman, J Andrew, Faloona, Ian, Thornton, Joel A, Wolfe, Glenn M, Vermeuel, Michael P, Jernigan, Christopher M, Peischl, Jeff, Ryerson, Thomas B, Thompson, Chelsea R, Bourgeois, Ilann, Warneke, Carsten, Gkatzelis, Georgios I, Coggon, Mathew M, Sekimoto, Kanako, Bui, T Paul, Dean-Day, Jonathan, Diskin, Glenn S, DiGangi, Joshua P, Nowak, John B, Moore, Richard H, Wiggins, Elizabeth B, Winstead, Edward L, Robinson, Claire, Thornhill, K Lee, Sanchez, Kevin J, Hall, Samuel R, Ullmann, Kirk, Dollner, Maximilian, Weinzierl, Bernadett, Blake, Donald R, and Bertram, Timothy H

Subjects
cloud condensation nuclei, cloud processing, dimethyl sulfide, marine sulfur, sulfate aerosol, Climate Action
Abstract

Oceans emit large quantities of dimethyl sulfide (DMS) to the marine atmosphere. The oxidation of DMS leads to the formation and growth of cloud condensation nuclei (CCN) with consequent effects on Earth's radiation balance and climate. The quantitative assessment of the impact of DMS emissions on CCN concentrations necessitates a detailed description of the oxidation of DMS in the presence of existing aerosol particles and clouds. In the unpolluted marine atmosphere, DMS is efficiently oxidized to hydroperoxymethyl thioformate (HPMTF), a stable intermediate in the chemical trajectory toward sulfur dioxide (SO2) and ultimately sulfate aerosol. Using direct airborne flux measurements, we demonstrate that the irreversible loss of HPMTF to clouds in the marine boundary layer determines the HPMTF lifetime (τHPMTF < 2 h) and terminates DMS oxidation to SO2 When accounting for HPMTF cloud loss in a global chemical transport model, we show that SO2 production from DMS is reduced by 35% globally and near-surface (0 to 3 km) SO2 concentrations over the ocean are lowered by 24%. This large, previously unconsidered loss process for volatile sulfur accelerates the timescale for the conversion of DMS to sulfate while limiting new particle formation in the marine atmosphere and changing the dynamics of aerosol growth. This loss process potentially reduces the spatial scale over which DMS emissions contribute to aerosol production and growth and weakens the link between DMS emission and marine CCN production with subsequent implications for cloud formation, radiative forcing, and climate.

Published
2021

2. HCOOH in the Remote Atmosphere: Constraints from Atmospheric Tomography (ATom) Airborne Observations

Author

Chen, Xin, Millet, Dylan B, Neuman, J Andrew, Veres, Patrick R, Ray, Eric A, Commane, Róisín, Daube, Bruce C, McKain, Kathryn, Schwarz, Joshua P, Katich, Joseph M, Froyd, Karl D, Schill, Gregory P, Kim, Michelle J, Crounse, John D, Allen, Hannah M, Apel, Eric C, Hornbrook, Rebecca S, Blake, Donald R, Nault, Benjamin A, Campuzano-Jost, Pedro, Jimenez, Jose L, and Dibb, Jack E

Subjects
formic acid, remote atmosphere, fire, deposition, Atmospheric Tomography Mission, iodide CIMS, chemical transport model, back trajectory
Abstract

Formic acid (HCOOH) is an important component of atmospheric acidity but its budget is poorly understood, with prior observations implying substantial missing sources. Here we combine pole-to-pole airborne observations from the Atmospheric Tomography Mission (ATom) with chemical transport model (GEOS-Chem CTM) and back trajectory analyses to provide the first global in-situ characterization of HCOOH in the remote atmosphere. ATom reveals sub-100 ppt HCOOH concentrations over most of the remote oceans, punctuated by large enhancements associated with continental outflow. Enhancements correlate with known combustion tracers and trajectory-based fire influences. The GEOS-Chem model underpredicts these in-plume HCOOH enhancements, but elsewhere we find no broad indication of a missing HCOOH source in the background free troposphere. We conclude that missing non-fire HCOOH precursors inferred previously are predominantly short-lived. We find indications of a wet scavenging underestimate in the model consistent with a positive HCOOH bias in the tropical upper troposphere. Observations reveal episodic evidence of ocean HCOOH uptake, which is well-captured by GEOS-Chem; however, despite its strong seawater undersaturation HCOOH is not consistently depleted in the remote marine boundary layer. Over fifty fire and mixed plumes were intercepted during ATom with widely varying transit times and source regions. HCOOH:CO normalized excess mixing ratios in these plumes range from 3.4 to >50 ppt/ppb CO and are often over an order of magnitude higher than expected primary emission ratios. HCOOH is thus a major reactive organic carbon reservoir in the aged plumes sampled during ATom, implying important missing pathways for in-plume HCOOH production.

Published
2021

3. Global airborne sampling reveals a previously unobserved dimethyl sulfide oxidation mechanism in the marine atmosphere

Author

Veres, Patrick R, Neuman, J Andrew, Bertram, Timothy H, Assaf, Emmanuel, Wolfe, Glenn M, Williamson, Christina J, Weinzierl, Bernadett, Tilmes, Simone, Thompson, Chelsea R, Thames, Alexander B, Schroder, Jason C, Saiz-Lopez, Alfonso, Rollins, Andrew W, Roberts, James M, Price, Derek, Peischl, Jeff, Nault, Benjamin A, Møller, Kristian H, Miller, David O, Meinardi, Simone, Li, Qinyi, Lamarque, Jean-François, Kupc, Agnieszka, Kjaergaard, Henrik G, Kinnison, Douglas, Jimenez, Jose L, Jernigan, Christopher M, Hornbrook, Rebecca S, Hills, Alan, Dollner, Maximilian, Day, Douglas A, Cuevas, Carlos A, Campuzano-Jost, Pedro, Burkholder, James, Bui, T Paul, Brune, William H, Brown, Steven S, Brock, Charles A, Bourgeois, Ilann, Blake, Donald R, Apel, Eric C, and Ryerson, Thomas B

Subjects
Earth Sciences, Atmospheric Sciences, Climate Action, dimethyl sulfide, marine sulfur, autoxidation, marine aerosols, aerosol sulfate
Abstract

Dimethyl sulfide (DMS), emitted from the oceans, is the most abundant biological source of sulfur to the marine atmosphere. Atmospheric DMS is oxidized to condensable products that form secondary aerosols that affect Earth's radiative balance by scattering solar radiation and serving as cloud condensation nuclei. We report the atmospheric discovery of a previously unquantified DMS oxidation product, hydroperoxymethyl thioformate (HPMTF, HOOCH2SCHO), identified through global-scale airborne observations that demonstrate it to be a major reservoir of marine sulfur. Observationally constrained model results show that more than 30% of oceanic DMS emitted to the atmosphere forms HPMTF. Coincident particle measurements suggest a strong link between HPMTF concentration and new particle formation and growth. Analyses of these observations show that HPMTF chemistry must be included in atmospheric models to improve representation of key linkages between the biogeochemistry of the ocean, marine aerosol formation and growth, and their combined effects on climate.

Published
2020

4. Large contribution of biomass burning emissions to ozone throughout the global remote troposphere

Author

Bourgeois, Ilann, Peischl, Jeff, Neuman, J. Andrew, Brown, Steven S., Thompson, Chelsea R., Aikin, Kenneth C., Allen, Hannah M., Angot, Hélène, Apel, Eric C., Baublitz, Colleen B., Brewer, Jared F., Campuzano-Jost, Pedro, Commane, Róisín, Crounse, John D., Daube, Bruce C., DiGangi, Joshua P., Diskin, Glenn S., Emmons, Louisa K., Fiore, Arlene M., Gkatzelis, Georgios I., Hills, Alan, Hornbrook, Rebecca S., Huey, L. Gregory, Jimenez, Jose L., Kim, Michelle, Lacey, Forrest, McKain, Kathryn, Murray, Lee T., Nault, Benjamin A., Parrish, David D., Ray, Eric, Sweeney, Colm, Tanner, David, Wofsy, Steven C., and Ryerson, Thomas B.

Published
2021

5. On the sources and sinks of atmospheric VOCs: an integrated analysis of recent aircraft campaigns over North America.

Author

Chen, Xin, Millet, Dylan B, Singh, Hanwant B, Wisthaler, Armin, Apel, Eric C, Atlas, Elliot L, Blake, Donald R, Bourgeois, Ilann, Brown, Steven S, Crounse, John D, de Gouw, Joost A, Flocke, Frank M, Fried, Alan, Heikes, Brian G, Hornbrook, Rebecca S, Mikoviny, Tomas, Min, Kyung-Eun, Müller, Markus, Neuman, J Andrew, O'Sullivan, Daniel W, Peischl, Jeff, Pfister, Gabriele G, Richter, Dirk, Roberts, James M, Ryerson, Thomas B, Shertz, Stephen R, Thompson, Chelsea R, Treadaway, Victoria, Veres, Patrick R, Walega, James, Warneke, Carsten, Washenfelder, Rebecca A, Weibring, Petter, and Yuan, Bin

Subjects
Meteorology & Atmospheric Sciences, Atmospheric Sciences, Astronomical and Space Sciences
Abstract

We apply a high-resolution chemical transport model (GEOS-Chem CTM) with updated treatment of volatile organic compounds (VOCs) and a comprehensive suite of airborne datasets over North America to (i) characterize the VOC budget and (ii) test the ability of current models to capture the distribution and reactivity of atmospheric VOCs over this region. Biogenic emissions dominate the North American VOC budget in the model, accounting for 70 % and 95 % of annually emitted VOC carbon and reactivity, respectively. Based on current inventories anthropogenic emissions have declined to the point where biogenic emissions are the dominant summertime source of VOC reactivity even in most major North American cities. Methane oxidation is a 2x larger source of nonmethane VOCs (via production of formaldehyde and methyl hydroperoxide) over North America in the model than are anthropogenic emissions. However, anthropogenic VOCs account for over half of the ambient VOC loading over the majority of the region owing to their longer aggregate lifetime. Fires can be a significant VOC source episodically but are small on average. In the planetary boundary layer (PBL), the model exhibits skill in capturing observed variability in total VOC abundance (R 2 = 0:36) and reactivity (R 2 = 0:54). The same is not true in the free troposphere (FT), where skill is low and there is a persistent low model bias (~ 60 %), with most (27 of 34) model VOCs underestimated by more than a factor of 2. A comparison of PBL: FT concentration ratios over the southeastern US points to a misrepresentation of PBL ventilation as a contributor to these model FT biases. We also find that a relatively small number of VOCs (acetone, methanol, ethane, acetaldehyde, formaldehyde, isoprene C oxidation products, methyl hydroperoxide) drive a large fraction of total ambient VOC reactivity and associated model biases; research to improve understanding of their budgets is thus warranted. A source tracer analysis suggests a current overestimate of biogenic sources for hydroxyacetone, methyl ethyl ketone and glyoxal, an underestimate of biogenic formic acid sources, and an underestimate of peroxyacetic acid production across biogenic and anthropogenic precursors. Future work to improve model representations of vertical transport and to address the VOC biases discussed are needed to advance predictions of ozone and SOA formation.

Published
2019

6. O3 Sensitivity to NOx and VOC During RECAP-CA: Implication for Emissions Control Strategies

Author

Wu, Shenglun, primary, Alaimo, Christopher P., additional, Zhao, Yusheng, additional, Green, Peter G., additional, Young, Thomas M., additional, Liu, Shang, additional, Kuwayama, Toshihiro, additional, Coggon, Matthew M., additional, Stockwell, Chelsea E., additional, Xu, Lu, additional, Warneke, Carsten, additional, Gilman, Jessica B., additional, Robinson, Michael A., additional, Veres, Patrick R., additional, Neuman, J. Andrew, additional, and Kleeman, Michael J., additional

Published
2024
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7. Observations of cyanogen bromide (BrCN) in the global troposphere and their relation to polar surface O3 destruction

Author

Roberts, James M., primary, Wang, Siyuan, additional, Veres, Patrick R., additional, Neuman, J. Andrew, additional, Robinson, Michael A., additional, Bourgeois, Ilann, additional, Peischl, Jeff, additional, Ryerson, Thomas B., additional, Thompson, Chelsea R., additional, Allen, Hannah M., additional, Crounse, John D., additional, Wennberg, Paul O., additional, Hall, Samuel R., additional, Ullmann, Kirk, additional, Meinardi, Simone, additional, Simpson, Isobel J., additional, and Blake, Donald, additional

Published
2024
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8. Calibration of Hydroxyacetonitrile (HOCH2CN) and Methyl isocyanate (CH3NCO) Isomers using I- Chemical Ionization Mass Spectrometry (CIMS).

Author

Finewax, Zachary, Chattopadhyay, Aparajeo, Neuman, J. Andrew, Roberts, James, and Burkholder, James

Subjects
CHEMICAL ionization mass spectrometry, ISOMERS, FIELD research, MICROBIOLOGICAL aerosols
Abstract

The toxic reduced nitrogen compound methyl isocyanate (CH3NCO, MIC) has been reported present in wildfire and bio-mass burning emissions, agricultural fumigation plumes, and indoor air. Its isomer, hydroxyacetonitrile (HOCH2CN, glycolonitrile, HAN) has not been observed in the Earth's atmosphere to date. In this study, absolute sensitivity calibrations for these isomers using two I- chemical ionization mass spectrometry (I-CIMS) instruments, time-of-flight (ToF) and quadrupole (Quad) instruments, commonly used in laboratory and field measurements, were performed, for the first time, over a range of ion-molecule reactor temperature (10–40 °C) and I(H2O)-/I- ratio (0.01–1). This study demonstrates that I-CIMS, under typical operating conditions, is not sensitive to MIC with limits of detection (LOD) of >860 and >570 ppb for the ToF and Quad I-CIMS instruments, respectively. Both I-CIMS instruments are, however, highly sensitive to the HAN isomer with 0.3 and 3 ppt LODs for the ToF-CIMS and Quad-CIMS instruments, respectively. These results contradict several recent field studies that have reported the detection of MIC using I-CIMS instruments. This study demonstrates that HAN, rather than MIC, was most likely the C2H3NO isomer observed in those field studies, although the source chemistry for HAN remains uncharacterized. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol

Author

Decker, Zachary C. J., primary, Novak, Gordon, additional, Aikin, Kenneth C., additional, Veres, Patrick, additional, Neuman, J. Andrew, additional, Bourgeois, Illan, additional, Bui, T. Paul, additional, Campuzano-Jost, Pedro, additional, Coggon, Matthew Mitchell, additional, Day, Doug A., additional, DiGangi, Joshua Paul, additional, Diskin, Glenn S., additional, Dollner, Maximilian, additional, Franchin, Ale, additional, Fredrickson, Carley D, additional, Froyd, Karl, additional, Gkatzelis, Georgios I., additional, Guo, Hongyu, additional, Hall, Samuel R, additional, Halliday, Hannah Selene, additional, Hayden, Katherine L, additional, Holmes, Christopher D., additional, Jimenez, Jose Luis, additional, Kupc, Agnieszka, additional, Lindaas, Jakob, additional, Midddlebrook, Ann, additional, Moore, Richard H, additional, Nault, Benjamin A, additional, Nowak, John B., additional, Pagonis, Demetrios, additional, Palm, Brett B, additional, Piel, Felix, additional, Peischl, Jeff, additional, Rickly, Pamela, additional, Robinson, Michael, additional, Rollins, Andrew W., additional, Ryerson, Thomas B., additional, Schill, Gregory P., additional, Sekimoto, Kanako, additional, Thompson, Chelsea, additional, Thornhill, Kenneth L, additional, Thornton, Joel A, additional, Ullmann, Kirk, additional, Warneke, Carsten, additional, Washenfelder, Rebecca Ann, additional, Weinzierl, Bernadett, additional, Wiggins, Elizabeth Brooke, additional, Williamson, Christina, additional, Winstead, Edward L, additional, Wisthaler, Armin, additional, Womack, Caroline, additional, and Brown, Steven S. S, additional

Published
2023
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11. Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol.

Author

Decker, Zachary C. J., Novak, Gordon A., Aikin, Kenneth, Veres, Patrick R., Neuman, J. Andrew, Bourgeois, Ilann, Bui, T. Paul, Campuzano‐Jost, Pedro, Coggon, Matthew M., Day, Douglas A., DiGangi, Joshua P., Diskin, Glenn S., Dollner, Maximilian, Franchin, Alessandro, Fredrickson, Carley D., Froyd, Karl D., Gkatzelis, Georgios I., Guo, Hongyu, Hall, Samuel R., and Halliday, Hannah

Subjects
WILDFIRES, BIOMASS burning, STRATOSPHERIC chemistry, TROPOSPHERIC aerosols, TROPOSPHERIC chemistry, OZONE layer, OZONE layer depletion, STRATOSPHERIC aerosols
Abstract

Heterogeneous chemical cycles of pyrogenic nitrogen and halides influence tropospheric ozone and affect the stratosphere during extreme Pyrocumulonimbus (PyroCB) events. We report field‐derived N2O5 uptake coefficients, γ(N2O5), and ClNO2 yields, φ(ClNO2), from two aircraft campaigns observing fresh smoke in the lower and mid troposphere and processed/aged smoke in the upper troposphere and lower stratosphere (UTLS). Derived φ(ClNO2) varied across the full 0–1 range but was typically <0.5 and smallest in a PyroCB (<0.05). Derived γ(N2O5) was low in agricultural smoke (0.2–3.6 × 10−3), extremely low in mid‐tropospheric wildfire smoke (0.1 × 10−3), but larger in PyroCB processed smoke (0.7–5.0 × 10−3). Aged biomass burning aerosol in the UTLS had a higher γ(N2O5) of 17 × 10−3 that increased with sulfate and liquid water, but that was 1–2 orders of magnitude lower than values for aqueous sulfuric aerosol used in stratospheric models. Plain Language Summary: The injection of reactive material into Earth's atmosphere from fires affects atmospheric composition at regional and hemispheric scales. Reported stratospheric ozone depletion during extreme events, such as the 2020 Australian wildfires, illustrates one example of fire impacts and the role of heterogeneous (gas‐particle) processes. We report field quantification of rates and product yields from airborne observations of smoke. Extremely slow heterogeneous reaction rates on young smoke increase with transport and aging, but upper atmospheric values are still a factor of 10 slower than parameterizations used in stratospheric models. Heterogeneous production of ClNO2, a major lower atmospheric chlorine activation pathway, may be active on biomass burning aerosol in the upper atmosphere. Key Points: ClNO2 formation is active on biomass burning (BB) particles but decreases with transport to the upper troposphere and lower stratosphere (UTLS)N2O5 uptake coefficients are low on young BB smoke and increase with transport through a PyroCB and UTLS agingN2O5 uptake coefficients on aged BB particles in the UTLS are significantly lower than those used in model parameterizations [ABSTRACT FROM AUTHOR]

Published
2024
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12. Observations of cyanogen bromide (BrCN) in the global troposphere and their relation to polar surface O3 destruction

Author

Roberts, James M., Wang, Siyuan, Veres, Patrick R., Neuman, J. Andrew, Robinson, Michael A., Bourgeois, Ilann, Peischl, Jeff, Ryerson, Thomas B., Thompson, Chelsea R., Allen, Hannah M., Crounse, John D., Wennberg, Paul O., Hall, Samuel R., Ullmann, Kirk, Meinardi, Simone, Simpson, Isobel J., and Blake, Donald

Abstract

Active bromine (e.g., Br2, BrCl, BrO, HOBr) promotes atmospheric ozone destruction and mercury removal. Here we report a previously unidentified participant in active-Br chemistry, cyanogen bromide (BrCN), measured during the NASA Atmospheric Tomography (ATom) mission. BrCN was confined to polar boundary layers, often appearing at concentrations higher than other Br compounds. The chemistry of BrCN determines whether it promotes or inhibits ozone and mercury removal. This dataset provides evidence that much of the BrCN was from atmospheric Br chemistry involving surface reactions with reduced nitrogen compounds. Since gas phase loss processes are known to be relatively slow, surface reactions must also be the major loss processes, with vertical profiles implying a BrCN atmospheric lifetime in the range 1–10 days. Liquid phase reactions of BrCN tend to convert Br to bromide (Br¯) or C-Br bonded organics, constituting a loss of active Br. Thus, accounting for BrCN chemistry is crucial to understanding polar Br cycling.

Published
2023

14. Midlatitude Ozone Depletion and Air Quality Impacts from Industrial Halogen Emissions in the Great Salt Lake Basin

Author

Womack, Caroline C., primary, Chace, Wyndom S., additional, Wang, Siyuan, additional, Baasandorj, Munkhbayar, additional, Fibiger, Dorothy L., additional, Franchin, Alessandro, additional, Goldberger, Lexie, additional, Harkins, Colin, additional, Jo, Duseong S., additional, Lee, Ben H., additional, Lin, John C., additional, McDonald, Brian C., additional, McDuffie, Erin E., additional, Middlebrook, Ann M., additional, Moravek, Alexander, additional, Murphy, Jennifer G., additional, Neuman, J. Andrew, additional, Thornton, Joel A., additional, Veres, Patrick R., additional, and Brown, Steven S., additional

Published
2023
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15. Chemical ionization mass spectrometry utilizing ammonium ions (NH4+ CIMS) for measurements of organic compounds in the atmosphere

Author

Xu, Lu, primary, Coggon, Matthew M., additional, Stockwell, Chelsea E., additional, Gilman, Jessica B., additional, Robinson, Michael A., additional, Breitenlechner, Martin, additional, Lamplugh, Aaron, additional, Crounse, John D., additional, Wennberg, Paul O., additional, Neuman, J. Andrew, additional, Novak, Gordon A., additional, Veres, Patrick R., additional, Brown, Steven S., additional, and Warneke, Carsten, additional

Published
2022
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16. Decadal Changes in Summertime Reactive Oxidized Nitrogen and Surface Ozone over the Southeast United States

Author

Li, Jingyi, Mao, Jingqiu, Fiore, Arlene M, Cohen, Ronald C, Crounse, John D, Teng, Alex P, Wennberg, Paul O, Lee, Ben H, Lopez-Hilfiker, Felipe D, Thornton, Joel A, Peischl, Jeff, Pollack, Ilana B, Ryerson, Thomas B, Veres, Patrick, Roberts, James M, Neuman, J. Andrew, Nowak, John B, Wolfe, Glenn M, Hanisco, Thomas F, Fried, Alan, Singh, Hanwant B, Dibb, Jack, Paulot, Fabien, and Horowitz, Larry W

Subjects
Environment Pollution
Abstract

Widespread efforts to abate ozone (O3) smog have significantly reduced emissions of nitrogen oxides (NOx) over the past 2 decades in the Southeast US, a place heavily influenced by both anthropogenic and biogenic emissions. How reactive nitrogen speciation responds to the reduction in NOx emissions in this region remains to be elucidated. Here we exploit aircraft measurements from ICARTT (International Consortium for Atmospheric Research on Transport and Transformation - July-August 2004), SENEX (Southeast Nexus - June-July 2013), and SEAC4RS (Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys - August-September 2013) and long-term ground measurement networks alongside a global chemistry-climate model to examine decadal changes in summertime reactive oxidized nitrogen (RON) and ozone over the Southeast US. We show that our model can reproduce the mean vertical profiles of major RON species and the total (NO (sub y)) in both 2004 and 2013. Among the major RON species, nitric acid (HNO3) is dominant (approximately 42-45 percent), followed by NOx (31 percent), total peroxy nitrates (Sigma PNs; 14 percent), and total alkyl nitrates (Sigma ANs; 9-12 percent) on a regional scale. We find that most RON species, including NOx, Sigma PNs, and HNO3, decline proportionally with decreasing NOx emissions in this region, leading to a similar decline in NO (sub y). This linear response might be in part due to the nearly constant summertime supply of biogenic VOC (Volatile Organic Compounds) emissions in this region. Our model captures the observed relative change in RON and surface ozone from 2004 to 2013. Model sensitivity tests indicate that further reductions of NOx emissions will lead to a continued decline in surface ozone and less frequent high-ozone events.

Published
2018
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18. Comparison of airborne measurements of NO, NO2, HONO, NOy, and CO during FIREX-AQ

Author

Bourgeois, Ilann, primary, Peischl, Jeff, additional, Neuman, J. Andrew, additional, Brown, Steven S., additional, Allen, Hannah M., additional, Campuzano-Jost, Pedro, additional, Coggon, Matthew M., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Gilman, Jessica B., additional, Gkatzelis, Georgios I., additional, Guo, Hongyu, additional, Halliday, Hannah A., additional, Hanisco, Thomas F., additional, Holmes, Christopher D., additional, Huey, L. Gregory, additional, Jimenez, Jose L., additional, Lamplugh, Aaron D., additional, Lee, Young Ro, additional, Lindaas, Jakob, additional, Moore, Richard H., additional, Nault, Benjamin A., additional, Nowak, John B., additional, Pagonis, Demetrios, additional, Rickly, Pamela S., additional, Robinson, Michael A., additional, Rollins, Andrew W., additional, Selimovic, Vanessa, additional, St. Clair, Jason M., additional, Tanner, David, additional, Vasquez, Krystal T., additional, Veres, Patrick R., additional, Warneke, Carsten, additional, Wennberg, Paul O., additional, Washenfelder, Rebecca A., additional, Wiggins, Elizabeth B., additional, Womack, Caroline C., additional, Xu, Lu, additional, Zarzana, Kyle J., additional, and Ryerson, Thomas B., additional

Published
2022
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19. Supplementary material to "A Chemical Ionization Mass Spectrometry Utilizing Ammonium Ions (NH4+ CIMS) for Measurements of Organic Compounds in the Atmosphere"

Author

Xu, Lu, primary, Coggon, Matthew M., additional, Stockwell, Chelsea E., additional, Gilman, Jessica B., additional, Robinson, Michael A., additional, Breitenlechner, Martin, additional, Lamplugh, Aaron, additional, Neuman, J. Andrew, additional, Novak, Gordon A., additional, Veres, Patrick R., additional, Brown, Steven S., additional, and Warneke, Carsten, additional

Published
2022
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20. A Chemical Ionization Mass Spectrometry Utilizing Ammonium Ions (NH4+ CIMS) for Measurements of Organic Compounds in the Atmosphere

Author

Xu, Lu, primary, Coggon, Matthew M., additional, Stockwell, Chelsea E., additional, Gilman, Jessica B., additional, Robinson, Michael A., additional, Breitenlechner, Martin, additional, Lamplugh, Aaron, additional, Neuman, J. Andrew, additional, Novak, Gordon A., additional, Veres, Patrick R., additional, Brown, Steven S., additional, and Warneke, Carsten, additional

Published
2022
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22. Observations of cyanogen bromide (BrCN) in the global troposphere and their relation to polar surface O3 destruction.

Author

Roberts, James M., Wang, Siyuan, Veres, Patrick R., Neuman, J. Andrew, Robinson, Michael A., Bourgeois, Ilann, Peischl, Jeff, Ryerson, Thomas B., Thompson, Chelsea R., Allen, Hannah M., Crounse, John D., Wennberg, Paul O., Hall, Samuel R., Ullmann, Kirk, Meinardi, Simone, Simpson, Isobel J., and Blake, Donald

Subjects
CYANOGEN bromide, ATMOSPHERIC ozone, SURFACE chemistry, NITROGEN compounds, ATMOSPHERIC chemistry, TROPOSPHERIC ozone, TROPOSPHERIC aerosols
Abstract

Active bromine (e.g., Br2, BrCl, BrO, HOBr) promotes atmospheric ozone destruction and mercury removal. Here we report a previously unidentified participant in active-Br chemistry, cyanogen bromide (BrCN), measured during the NASA Atmospheric Tomography (ATom) mission. BrCN was confined to polar boundary layers, often appearing at concentrations higher than other Br compounds. The chemistry of BrCN determines whether it promotes or inhibits ozone and mercury removal. This dataset provides evidence that much of the BrCN was from atmospheric Br chemistry involving surface reactions with reduced nitrogen compounds. Since gas phase loss processes are known to be relatively slow, surface reactions must also be the major loss processes, with vertical profiles implying a BrCN atmospheric lifetime in the range 1–10 days. Liquid phase reactions of BrCN tend to convert Br to bromide (Br¯) or C-Br bonded organics, constituting a loss of active Br. Thus, accounting for BrCN chemistry is crucial to understanding polar Br cycling. [ABSTRACT FROM AUTHOR]

Published
2023
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23. Airborne Emission Rate Measurements Validate Remote Sensing Observations and Emission Inventories of Western U.S. Wildfires

Author

Stockwell, Chelsea E., primary, Bela, Megan M., additional, Coggon, Matthew M., additional, Gkatzelis, Georgios I., additional, Wiggins, Elizabeth, additional, Gargulinski, Emily M., additional, Shingler, Taylor, additional, Fenn, Marta, additional, Griffin, Debora, additional, Holmes, Christopher D., additional, Ye, Xinxin, additional, Saide, Pablo E., additional, Bourgeois, Ilann, additional, Peischl, Jeff, additional, Womack, Caroline C., additional, Washenfelder, Rebecca A., additional, Veres, Patrick R., additional, Neuman, J. Andrew, additional, Gilman, Jessica B., additional, Lamplugh, Aaron, additional, Schwantes, Rebecca H., additional, McKeen, Stuart A., additional, Wisthaler, Armin, additional, Piel, Felix, additional, Guo, Hongyu, additional, Campuzano-Jost, Pedro, additional, Jimenez, Jose L., additional, Fried, Alan, additional, Hanisco, Thomas F., additional, Huey, Lewis Gregory, additional, Perring, Anne, additional, Katich, Joseph M., additional, Diskin, Glenn S., additional, Nowak, John B., additional, Bui, T. Paul, additional, Halliday, Hannah S., additional, DiGangi, Joshua P., additional, Pereira, Gabriel, additional, James, Eric P., additional, Ahmadov, Ravan, additional, McLinden, Chris A., additional, Soja, Amber J., additional, Moore, Richard H., additional, Hair, Johnathan W., additional, and Warneke, Carsten, additional

Published
2022
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25. Comparison of airborne measurements of NO, NO2, HONO, NOy and CO during FIREX-AQ

Author

Bourgeois, Ilann, Peischl, Jeff, Neuman, J. Andrew, Brown, Steven S., Allen, Hannah M., Campuzano-Jost, Pedro, Coggon, Matthew M., DiGangi, Joshua P., Diskin, Glenn S., Gilman, Jessica B., Gkatzelis, Georgios I., Guo, Hongyu, Halliday, Hannah, Hanisco, Thomas F., Holmes, Christopher D., Huey, L. Gregory, Jimenez, Jose L., Lamplugh, Aaron D., Lee, Young Ro, Lindaas, Jakob, Moore, Richard H., Nowak, John B., Pagonis, Demetrios, Rickly, Pamela S., Robinson, Michael A., Rollins, Andrew W., Selimovic, Vanessa, Clair, Jason M., Tanner, David, Vasquez, Krystal T., Veres, Patrick R., Warneke, Carsten, Wennberg, Paul O., Washenfelder, Rebecca A., Wiggins, Elizabeth B., Womack, Caroline C., Xu, Lu, Zarzana, Kyle J., and Ryerson, Thomas B.

Abstract

We present a comparison of fast-response instruments installed onboard the NASA DC-8 aircraft that measured nitrogen oxides (NO and NO2), nitrous acid (HONO), total reactive odd nitrogen (measured both as the total (NOy) and from the sum of individually measured species (SNOy)) and carbon monoxide (CO) in the troposphere during the 2019 Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) campaign. By targeting smoke from summertime wildfires, prescribed fires and agricultural burns across the continental United States, FIREX-AQ provided a unique opportunity to investigate measurement accuracy in concentrated plumes where hundreds of species coexist. Here, we compare NO measurements by chemiluminescence (CL) and laser induced fluorescence (LIF); NO2 measurements by CL, LIF and cavity enhanced spectroscopy (CES); HONO measurements by CES and iodide-adduct chemical ionization mass spectrometry (CIMS); and CO measurements by tunable diode laser absorption spectrometry (TDLAS) and integrated cavity output spectroscopy (ICOS). Additionally, total NOy measurements using the CL instrument were compared with SNOy (= NO + NO2 + HONO + nitric acid (HNO3) + acyl peroxy nitrates (APNs) + submicron particulate nitrate (pNO3)). The aircraft instrument intercomparisons demonstrate the following: 1) NO measurements by CL and LIF agreed well within instrument uncertainties, but with potentially reduced time response for the CL instrument; 2) NO2 measurements by LIF and CES agreed well within instrument uncertainties, but CL NO2 was on average 10 % higher; 3) CES and CIMS HONO measurements were highly correlated in each fire plume transect, but the correlation slope of CES vs. CIMS for all 1 Hz data during FIREX-AQ was 1.8, which we attribute to a reduction in the CIMS sensitivity to HONO in high temperature environments; 4) NOy budget closure was demonstrated for all flights within the combined instrument uncertainties of 25 %. However, we used a fluid dynamic flow model to estimate that average pNO3 sampling fraction through the NOy inlet in smoke was variable from one flight to another and ranged between 0.36 and 0.99, meaning that approximately 0–24 % on average of the total measured NOy in smoke may have been unaccounted for and may be due to unmeasured species such as organic nitrates; 5) CO measurements by ICOS and TDLAS agreed well within combined instrument uncertainties, but with a systematic offset that averaged 2.87 ppbv; and 6) integrating smoke plumes followed by fitting the integrated values of each plume improved the correlation between independent measurements.

Published
2022

27. The NASA Atmospheric Tomography (ATom) Mission: Imaging the Chemistry of the Global Atmosphere

Author

Thompson, Chelsea R., primary, Wofsy, Steven C., additional, Prather, Michael J., additional, Newman, Paul A., additional, Hanisco, Thomas F., additional, Ryerson, Thomas B., additional, Fahey, David W., additional, Apel, Eric C., additional, Brock, Charles A., additional, Brune, William H., additional, Froyd, Karl, additional, Katich, Joseph M., additional, Nicely, Julie M., additional, Peischl, Jeff, additional, Ray, Eric, additional, Veres, Patrick R., additional, Wang, Siyuan, additional, Allen, Hannah M., additional, Asher, Elizabeth, additional, Bian, Huisheng, additional, Blake, Donald, additional, Bourgeois, Ilann, additional, Budney, John, additional, Bui, T. Paul, additional, Butler, Amy, additional, Campuzano-Jost, Pedro, additional, Chang, Cecilia, additional, Chin, Mian, additional, Commane, Róisín, additional, Correa, Gus, additional, Crounse, John D., additional, Daube, Bruce, additional, Dibb, Jack E., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Dollner, Maximilian, additional, Elkins, James W., additional, Fiore, Arlene M., additional, Flynn, Clare M., additional, Guo, Hao, additional, Hall, Samuel R., additional, Hannun, Reem A., additional, Hills, Alan, additional, Hintsa, Eric J., additional, Hodzic, Alma, additional, Hornbrook, Rebecca S., additional, Huey, L. Greg, additional, Jimenez, Jose L., additional, Keeling, Ralph F., additional, Kim, Michelle J., additional, Kupc, Agnieszka, additional, Lacey, Forrest, additional, Lait, Leslie R., additional, Lamarque, Jean-Francois, additional, Liu, Junhua, additional, McKain, Kathryn, additional, Meinardi, Simone, additional, Miller, David O., additional, Montzka, Stephen A., additional, Moore, Fred L., additional, Morgan, Eric J., additional, Murphy, Daniel M., additional, Murray, Lee T., additional, Nault, Benjamin A., additional, Neuman, J. Andrew, additional, Nguyen, Louis, additional, Gonzalez, Yenny, additional, Rollins, Andrew, additional, Rosenlof, Karen, additional, Sargent, Maryann, additional, Schill, Gregory, additional, Schwarz, Joshua P., additional, Clair, Jason M. St., additional, Steenrod, Stephen D., additional, Stephens, Britton B., additional, Strahan, Susan E., additional, Strode, Sarah A., additional, Sweeney, Colm, additional, Thames, Alexander B., additional, Ullmann, Kirk, additional, Wagner, Nicholas, additional, Weber, Rodney, additional, Weinzierl, Bernadett, additional, Wennberg, Paul O., additional, Williamson, Christina J., additional, Wolfe, Glenn M., additional, and Zeng, Linghan, additional

Published
2022
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28. Supplementary material to &quot;Comparison of airborne measurements of NO, NO&lt;sub&gt;2&lt;/sub&gt;, HONO, NO&lt;sub&gt;y&lt;/sub&gt; and CO during FIREX-AQ&quot;

Author

Bourgeois, Ilann, primary, Peischl, Jeff, additional, Neuman, J. Andrew, additional, Brown, Steven S., additional, Allen, Hannah M., additional, Campuzano-Jost, Pedro, additional, Coggon, Matthew M., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Gilman, Jessica B., additional, Gkatzelis, Georgios I., additional, Guo, Hongyu, additional, Halliday, Hannah, additional, Hanisco, Thomas F., additional, Holmes, Christopher D., additional, Huey, L. Gregory, additional, Jimenez, Jose L., additional, Lamplugh, Aaron D., additional, Lee, Young Ro, additional, Lindaas, Jakob, additional, Moore, Richard H., additional, Nowak, John B., additional, Pagonis, Demetrios, additional, Rickly, Pamela S., additional, Robinson, Michael A., additional, Rollins, Andrew W., additional, Selimovic, Vanessa, additional, St. Clair, Jason M., additional, Tanner, David, additional, Vasquez, Krystal T., additional, Veres, Patrick R., additional, Warneke, Carsten, additional, Wennberg, Paul O., additional, Washenfelder, Rebecca A., additional, Wiggins, Elizabeth B., additional, Womack, Caroline C., additional, Xu, Lu, additional, Zarzana, Kyle J., additional, and Ryerson, Thomas B., additional

Published
2022
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29. Furoyl peroxynitrate (fur-PAN), a product of VOC–NOxphotochemistry from biomass burning emissions: photochemical synthesis, calibration, chemical characterization, and first atmospheric observations

Author

Roberts, James M., primary, Neuman, J. Andrew, additional, Brown, Steven S., additional, Veres, Patrick R., additional, Coggon, Matthew M., additional, Stockwell, Chelsea E., additional, Warneke, Carsten, additional, Peischl, Jeff, additional, and Robinson, Michael A., additional

Published
2022
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31. Formaldehyde evolution in US wildfire plumes during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ)

Author

Liao, Jin, primary, Wolfe, Glenn M., additional, Hannun, Reem A., additional, St. Clair, Jason M., additional, Hanisco, Thomas F., additional, Gilman, Jessica B., additional, Lamplugh, Aaron, additional, Selimovic, Vanessa, additional, Diskin, Glenn S., additional, Nowak, John B., additional, Halliday, Hannah S., additional, DiGangi, Joshua P., additional, Hall, Samuel R., additional, Ullmann, Kirk, additional, Holmes, Christopher D., additional, Fite, Charles H., additional, Agastra, Anxhelo, additional, Ryerson, Thomas B., additional, Peischl, Jeff, additional, Bourgeois, Ilann, additional, Warneke, Carsten, additional, Coggon, Matthew M., additional, Gkatzelis, Georgios I., additional, Sekimoto, Kanako, additional, Fried, Alan, additional, Richter, Dirk, additional, Weibring, Petter, additional, Apel, Eric C., additional, Hornbrook, Rebecca S., additional, Brown, Steven S., additional, Womack, Caroline C., additional, Robinson, Michael A., additional, Washenfelder, Rebecca A., additional, Veres, Patrick R., additional, and Neuman, J. Andrew, additional

Published
2021
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32. Ozone chemistry in western U.S. wildfire plumes

Author

Xu, Lu, primary, Crounse, John D., additional, Vasquez, Krystal T., additional, Allen, Hannah, additional, Wennberg, Paul O., additional, Bourgeois, Ilann, additional, Brown, Steven S., additional, Campuzano-Jost, Pedro, additional, Coggon, Matthew M., additional, Crawford, James H., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Fried, Alan, additional, Gargulinski, Emily M., additional, Gilman, Jessica B., additional, Gkatzelis, Georgios I., additional, Guo, Hongyu, additional, Hair, Johnathan W., additional, Hall, Samuel R., additional, Halliday, Hannah A., additional, Hanisco, Thomas F., additional, Hannun, Reem A., additional, Holmes, Christopher D., additional, Huey, L. Gregory, additional, Jimenez, Jose L., additional, Lamplugh, Aaron, additional, Lee, Young Ro, additional, Liao, Jin, additional, Lindaas, Jakob, additional, Neuman, J. Andrew, additional, Nowak, John B., additional, Peischl, Jeff, additional, Peterson, David A., additional, Piel, Felix, additional, Richter, Dirk, additional, Rickly, Pamela S., additional, Robinson, Michael A., additional, Rollins, Andrew W., additional, Ryerson, Thomas B., additional, Sekimoto, Kanako, additional, Selimovic, Vanessa, additional, Shingler, Taylor, additional, Soja, Amber J., additional, St. Clair, Jason M., additional, Tanner, David J., additional, Ullmann, Kirk, additional, Veres, Patrick R., additional, Walega, James, additional, Warneke, Carsten, additional, Washenfelder, Rebecca A., additional, Weibring, Petter, additional, Wisthaler, Armin, additional, Wolfe, Glenn M., additional, Womack, Caroline C., additional, and Yokelson, Robert J., additional

Published
2021
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33. Novel Analysis to Quantify Plume Crosswind Heterogeneity Applied to Biomass Burning Smoke

Author

Decker, Zachary C. J., primary, Wang, Siyuan, additional, Bourgeois, Ilann, additional, Campuzano Jost, Pedro, additional, Coggon, Matthew M., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Flocke, Frank M., additional, Franchin, Alessandro, additional, Fredrickson, Carley D., additional, Gkatzelis, Georgios I., additional, Hall, Samuel R., additional, Halliday, Hannah, additional, Hayden, Katherine, additional, Holmes, Christopher D., additional, Huey, L. Gregory, additional, Jimenez, Jose L., additional, Lee, Young Ro, additional, Lindaas, Jakob, additional, Middlebrook, Ann M., additional, Montzka, Denise D., additional, Neuman, J. Andrew, additional, Nowak, John B., additional, Pagonis, Demetrios, additional, Palm, Brett B., additional, Peischl, Jeff, additional, Piel, Felix, additional, Rickly, Pamela S., additional, Robinson, Michael A., additional, Rollins, Andrew W., additional, Ryerson, Thomas B., additional, Sekimoto, Kanako, additional, Thornton, Joel A., additional, Tyndall, Geoff S., additional, Ullmann, Kirk, additional, Veres, Patrick R., additional, Warneke, Carsten, additional, Washenfelder, Rebecca A., additional, Weinheimer, Andrew J., additional, Wisthaler, Armin, additional, Womack, Caroline, additional, and Brown, Steven S., additional

Published
2021
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34. Nighttime and daytime dark oxidation chemistry in wildfire plumes: an observation and model analysis of FIREX-AQ aircraft data

Author

Decker, Zachary C. J., primary, Robinson, Michael A., additional, Barsanti, Kelley C., additional, Bourgeois, Ilann, additional, Coggon, Matthew M., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Flocke, Frank M., additional, Franchin, Alessandro, additional, Fredrickson, Carley D., additional, Gkatzelis, Georgios I., additional, Hall, Samuel R., additional, Halliday, Hannah, additional, Holmes, Christopher D., additional, Huey, L. Gregory, additional, Lee, Young Ro, additional, Lindaas, Jakob, additional, Middlebrook, Ann M., additional, Montzka, Denise D., additional, Moore, Richard, additional, Neuman, J. Andrew, additional, Nowak, John B., additional, Palm, Brett B., additional, Peischl, Jeff, additional, Piel, Felix, additional, Rickly, Pamela S., additional, Rollins, Andrew W., additional, Ryerson, Thomas B., additional, Schwantes, Rebecca H., additional, Sekimoto, Kanako, additional, Thornhill, Lee, additional, Thornton, Joel A., additional, Tyndall, Geoffrey S., additional, Ullmann, Kirk, additional, Van Rooy, Paul, additional, Veres, Patrick R., additional, Warneke, Carsten, additional, Washenfelder, Rebecca A., additional, Weinheimer, Andrew J., additional, Wiggins, Elizabeth, additional, Winstead, Edward, additional, Wisthaler, Armin, additional, Womack, Caroline, additional, and Brown, Steven S., additional

Published
2021
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36. Rapid cloud removal of dimethyl sulfide oxidation products limits SO 2 and cloud condensation nuclei production in the marine atmosphere

Author

Novak, Gordon A., primary, Fite, Charles H., additional, Holmes, Christopher D., additional, Veres, Patrick R., additional, Neuman, J. Andrew, additional, Faloona, Ian, additional, Thornton, Joel A., additional, Wolfe, Glenn M., additional, Vermeuel, Michael P., additional, Jernigan, Christopher M., additional, Peischl, Jeff, additional, Ryerson, Thomas B., additional, Thompson, Chelsea R., additional, Bourgeois, Ilann, additional, Warneke, Carsten, additional, Gkatzelis, Georgios I., additional, Coggon, Mathew M., additional, Sekimoto, Kanako, additional, Bui, T. Paul, additional, Dean-Day, Jonathan, additional, Diskin, Glenn S., additional, DiGangi, Joshua P., additional, Nowak, John B., additional, Moore, Richard H., additional, Wiggins, Elizabeth B., additional, Winstead, Edward L., additional, Robinson, Claire, additional, Thornhill, K. Lee, additional, Sanchez, Kevin J., additional, Hall, Samuel R., additional, Ullmann, Kirk, additional, Dollner, Maximilian, additional, Weinzierl, Bernadett, additional, Blake, Donald R., additional, and Bertram, Timothy H., additional

Published
2021
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37. Global tropospheric halogen (Cl, Br, I) chemistry and its impact on oxidants

Author

Wang, Xuan, primary, Jacob, Daniel J., additional, Downs, William, additional, Zhai, Shuting, additional, Zhu, Lei, additional, Shah, Viral, additional, Holmes, Christopher D., additional, Sherwen, Tomás, additional, Alexander, Becky, additional, Evans, Mathew J., additional, Eastham, Sebastian D., additional, Neuman, J. Andrew, additional, Veres, Patrick R., additional, Koenig, Theodore K., additional, Volkamer, Rainer, additional, Huey, L. Gregory, additional, Bannan, Thomas J., additional, Percival, Carl J., additional, Lee, Ben H., additional, and Thornton, Joel A., additional

Published
2021
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38. Chemical Tomography in a Fresh Wildland Fire Plume: A Large Eddy Simulation (LES) Study

Author

Wang, Siyuan, primary, Coggon, Matthew M., additional, Gkatzelis, Georgios I., additional, Warneke, Carsten, additional, Bourgeois, Ilann, additional, Ryerson, Thomas, additional, Peischl, Jeff, additional, Veres, Patrick R., additional, Neuman, J. Andrew, additional, Hair, Johnathan, additional, Shingler, Taylor, additional, Fenn, Marta, additional, Diskin, Glenn, additional, Huey, L. Greg, additional, Lee, Young Ro, additional, Apel, Eric C., additional, Hornbrook, Rebecca S., additional, Hills, Alan J., additional, Hall, Samuel R., additional, Ullmann, Kirk, additional, Bela, Megan M., additional, Trainer, Michael K., additional, Kumar, Rajesh, additional, Orlando, John J., additional, Flocke, Frank M., additional, and Emmons, Louisa K., additional

Published
2021
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40. Supplementary material to "Global tropospheric halogen (Cl, Br, I) chemistry and its impact on oxidants"

Author

Wang, Xuan, primary, Jacob, Daniel J., additional, Downs, William, additional, Zhai, Shuting, additional, Zhu, Lei, additional, Shah, Viral, additional, Holmes, Christopher D., additional, Sherwen, Tomás, additional, Alexander, Becky, additional, Evans, Mathew J., additional, Eastham, Sebastian D., additional, Neuman, J. Andrew, additional, Veres, Patrick, additional, Koenig, Theodore K., additional, Volkamer, Rainer, additional, Huey, L. Gregory, additional, Bannan, Thomas J., additional, Percival, Carl J., additional, Lee, Ben H., additional, and Thornton, Joel A., additional

Published
2021
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41. Formaldehyde evolution in U.S. wildfire plumes during FIREX-AQ

Author

Liao, Jin, primary, Wolfe, Glenn M., additional, Hannun, Reem A., additional, St. Clair, Jason M., additional, Hanisco, Thomas F., additional, Gilman, Jessica B., additional, Lamplugh, Aaron, additional, Selimovic, Vanessa, additional, Diskin, Glenn S., additional, Nowak, John B., additional, Halliday, Hannah S., additional, DiGangi, Joshua P., additional, Hall, Samuel R., additional, Ullmann, Kirk, additional, Holmes, Christopher D., additional, Fite, Charles H., additional, Agastra, Anxhelo, additional, Ryerson, Thomas B., additional, Peischl, Jeff, additional, Bourgeois, Ilann, additional, Warneke, Carsten, additional, Coggon, Matthew M., additional, Gkatzelis, Georgios I., additional, Sekimoto, Kanako, additional, Fried, Alan, additional, Richter, Dirk, additional, Weibring, Petter, additional, Apel, Eric C., additional, Hornbrook, Rebecca S., additional, Brown, Steven S., additional, Womack, Caroline C., additional, Robinson, Michael A., additional, Washenfelder, Rebecca A., additional, Veres, Patrick R., additional, and Neuman, J. Andrew, additional

Published
2021
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42. Supplementary material to "Formaldehyde evolution in U.S. wildfire plumes during FIREX-AQ"

Author

Liao, Jin, primary, Wolfe, Glenn M., additional, Hannun, Reem A., additional, St. Clair, Jason M., additional, Hanisco, Thomas F., additional, Gilman, Jessica B., additional, Lamplugh, Aaron, additional, Selimovic, Vanessa, additional, Diskin, Glenn S., additional, Nowak, John B., additional, Halliday, Hannah S., additional, DiGangi, Joshua P., additional, Hall, Samuel R., additional, Ullmann, Kirk, additional, Holmes, Christopher D., additional, Fite, Charles H., additional, Agastra, Anxhelo, additional, Ryerson, Thomas B., additional, Peischl, Jeff, additional, Bourgeois, Ilann, additional, Warneke, Carsten, additional, Coggon, Matthew M., additional, Gkatzelis, Georgios I., additional, Sekimoto, Kanako, additional, Fried, Alan, additional, Richter, Dirk, additional, Weibring, Petter, additional, Apel, Eric C., additional, Hornbrook, Rebecca S., additional, Brown, Steven S., additional, Womack, Caroline C., additional, Robinson, Michael A., additional, Washenfelder, Rebecca A., additional, Veres, Patrick R., additional, and Neuman, J. Andrew, additional

Published
2021
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43. Validation of IASI Satellite Ammonia Observations at the Pixel Scale Using In Situ Vertical Profiles

Author

Guo, Xuehui, primary, Wang, Rui, additional, Pan, Da, additional, Zondlo, Mark A., additional, Clarisse, Lieven, additional, Van Damme, Martin, additional, Whitburn, Simon, additional, Coheur, Pierre‐François, additional, Clerbaux, Cathy, additional, Franco, Bruno, additional, Golston, Levi M., additional, Wendt, Lars, additional, Sun, Kang, additional, Tao, Lei, additional, Miller, David, additional, Mikoviny, Tomas, additional, Müller, Markus, additional, Wisthaler, Armin, additional, Tevlin, Alexandra G., additional, Murphy, Jennifer G., additional, Nowak, John B., additional, Roscioli, Joseph R., additional, Volkamer, Rainer, additional, Kille, Natalie, additional, Neuman, J. Andrew, additional, Eilerman, Scott J., additional, Crawford, James H., additional, Yacovitch, Tara I., additional, Barrick, John D., additional, and Scarino, Amy Jo, additional

Published
2021
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45. Supplementary material to "Nighttime and Daytime Dark Oxidation Chemistry in Wildfire Plumes: An Observation and Model Analysis of FIREX-AQ Aircraft Data"

Author

Decker, Zachary C. J., primary, Robinson, Michael A., additional, Barsanti, Kelley C., additional, Bourgeois, Ilann, additional, Coggon, Matthew M., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Flocke, Frank M., additional, Franchin, Alessandro, additional, Fredrickson, Carley D., additional, Hall, Samuel R., additional, Halliday, Hannah, additional, Holmes, Christopher D., additional, Huey, L. Gregory, additional, Lee, Young Ro, additional, Lindaas, Jakob, additional, Middlebrook, Ann M., additional, Montzka, Denise D., additional, Moore, Richard H., additional, Neuman, J. Andrew, additional, Nowak, John B., additional, Palm, Brett B., additional, Peischl, Jeff, additional, Rickly, Pamela S., additional, Rollins, Andrew W., additional, Ryerson, Thomas B., additional, Schwantes, Rebecca H., additional, Thornhill, Lee, additional, Thornton, Joel A., additional, Tyndall, Geoff S., additional, Ullmann, Kirk, additional, Van Rooy, Paul, additional, Veres, Patrick R., additional, Weinheimer, Andrew J., additional, Wiggins, Elizabeth, additional, Winstead, Edward, additional, Womack, Caroline, additional, and Brown, Steven S., additional

Published
2021
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46. Global airborne sampling reveals a previously unobserved dimethyl sulfide oxidation mechanism in the marine atmosphere

Author

Veres, Patrick R., Neuman, J. Andrew, Bertram, Timothy H., Assaf, Emmanuel, Wolfe, Glenn M., Williamson, Christina J., Weinzierl, Bernadett, Tilmes, Simone, Thompson, Chelsea R., Thames, Alexander B., Schroder, Jason C., Saiz-lopez, Alfonso, Rollins, Andrew W., Roberts, James M., Price, Derek, Peischl, Jeff, Nault, Benjamin A., Møller, Kristian H., Miller, David O., Meinardi, Simone, Li, Qinyi, Lamarque, Jean-françois, Kupc, Agnieszka, Kjaergaard, Henrik G., Kinnison, Douglas, Jimenez, Jose L., Jernigan, Christopher M., Hornbrook, Rebecca S., Hills, Alan, Dollner, Maximilian, Day, Douglas A., Cuevas, Carlos A., Campuzano-jost, Pedro, Burkholder, James, Bui, T. Paul, Brune, William H., Brown, Steven S., Brock, Charles A., Bourgeois, Ilann, Blake, Donald R., Apel, Eric C., Ryerson, Thomas B., Veres, Patrick R., Neuman, J. Andrew, Bertram, Timothy H., Assaf, Emmanuel, Wolfe, Glenn M., Williamson, Christina J., Weinzierl, Bernadett, Tilmes, Simone, Thompson, Chelsea R., Thames, Alexander B., Schroder, Jason C., Saiz-lopez, Alfonso, Rollins, Andrew W., Roberts, James M., Price, Derek, Peischl, Jeff, Nault, Benjamin A., Møller, Kristian H., Miller, David O., Meinardi, Simone, Li, Qinyi, Lamarque, Jean-françois, Kupc, Agnieszka, Kjaergaard, Henrik G., Kinnison, Douglas, Jimenez, Jose L., Jernigan, Christopher M., Hornbrook, Rebecca S., Hills, Alan, Dollner, Maximilian, Day, Douglas A., Cuevas, Carlos A., Campuzano-jost, Pedro, Burkholder, James, Bui, T. Paul, Brune, William H., Brown, Steven S., Brock, Charles A., Bourgeois, Ilann, Blake, Donald R., Apel, Eric C., and Ryerson, Thomas B.

Published
2020

47. Global airborne sampling reveals a previously unobserved dimethyl sulfide oxidation mechanism in the marine atmosphere

Author

National Oceanic and Atmospheric Administration (US), National Aeronautics and Space Administration (US), Independent Research Fund Denmark, University of Copenhagen, Ministry of Higher Education and Science (Denmark), Austrian Science Fund, European Commission, National Center for Atmospheric Research (US), National Science Foundation (US), University of Vienna, Veres, P. R. [0000-0001-7539-353X], Wolfe, G.M. [0000-0001-6586-4043], Saiz-Lopez, A. [0000-0002-0060-1581], Peischl, Jeff [0000-0002-9320-7101], Moller, Kristian H. [0000-0001-8070-8516], Li, Qinyi [0000-0002-5146-5831], Kjaergaard, Henrik G. [0000-0002-7275-8297], Kinnison, Douglas [0000-0002-3418-0834], Cuevas, Carlos A. [0000-0002-9251-5460], Campuzano-Jost, Pedro [0000-0003-3930-010X], Brown, Steven S. [0000-0001-7477-9078], Veres, P. R., Neuman, J. Andrew, Bertram, Timothy H., Assaf, Emmanuel, Wolfe, G.M., Williamson, C. J., Weinzierl, B., Tilmes, Simone, Thompson, C. R., Thames, Alexander B., Schroder, Jason C., Saiz-Lopez, A., Rollins, Andrew W., Roberts, James M., Price, Derek, Peischl, Jeff, Nault, Benjamin A., Moller, Kristian H., Miller, David O., Meinardi, Simone, Li, Qinyi, Lamarque, Jean-François, Kupc, A., Kjaergaard, Henrik G., Kinnison, Douglas E., Jiménez, José L., Jernigan, C. M., Hornbrook, Rebecca S., Hills, Alan, Dollner, M., Day, Douglas A., Cuevas, Carlos A., Campuzano-Jost, Pedro, Burkholder, James, Bui, T. Paul, Brune, William H., Brown, Steven S., Brock, Charles A., Bourgeois, Ilann, Blake, Donald R., Apel, Eric C., Ryerson, Thomas B., National Oceanic and Atmospheric Administration (US), National Aeronautics and Space Administration (US), Independent Research Fund Denmark, University of Copenhagen, Ministry of Higher Education and Science (Denmark), Austrian Science Fund, European Commission, National Center for Atmospheric Research (US), National Science Foundation (US), University of Vienna, Veres, P. R. [0000-0001-7539-353X], Wolfe, G.M. [0000-0001-6586-4043], Saiz-Lopez, A. [0000-0002-0060-1581], Peischl, Jeff [0000-0002-9320-7101], Moller, Kristian H. [0000-0001-8070-8516], Li, Qinyi [0000-0002-5146-5831], Kjaergaard, Henrik G. [0000-0002-7275-8297], Kinnison, Douglas [0000-0002-3418-0834], Cuevas, Carlos A. [0000-0002-9251-5460], Campuzano-Jost, Pedro [0000-0003-3930-010X], Brown, Steven S. [0000-0001-7477-9078], Veres, P. R., Neuman, J. Andrew, Bertram, Timothy H., Assaf, Emmanuel, Wolfe, G.M., Williamson, C. J., Weinzierl, B., Tilmes, Simone, Thompson, C. R., Thames, Alexander B., Schroder, Jason C., Saiz-Lopez, A., Rollins, Andrew W., Roberts, James M., Price, Derek, Peischl, Jeff, Nault, Benjamin A., Moller, Kristian H., Miller, David O., Meinardi, Simone, Li, Qinyi, Lamarque, Jean-François, Kupc, A., Kjaergaard, Henrik G., Kinnison, Douglas E., Jiménez, José L., Jernigan, C. M., Hornbrook, Rebecca S., Hills, Alan, Dollner, M., Day, Douglas A., Cuevas, Carlos A., Campuzano-Jost, Pedro, Burkholder, James, Bui, T. Paul, Brune, William H., Brown, Steven S., Brock, Charles A., Bourgeois, Ilann, Blake, Donald R., Apel, Eric C., and Ryerson, Thomas B.

Abstract

Dimethyl sulfide (DMS), emitted from the oceans, is the most abundant biological source of sulfur to the marine atmosphere. Atmospheric DMS is oxidized to condensable products that form secondary aerosols that affect Earth’s radiative balance by scattering solar radiation and serving as cloud condensation nuclei. We report the atmospheric discovery of a previously unquantified DMS oxidation product, hydroperoxymethyl thioformate (HPMTF, HOOCH2SCHO), identified through global-scale airborne observations that demonstrate it to be a major reservoir of marine sulfur. Observationally constrained model results show that more than 30% of oceanic DMS emitted to the atmosphere forms HPMTF. Coincident particle measurements suggest a strong link between HPMTF concentration and new particle formation and growth. Analyses of these observations show that HPMTF chemistry must be included in atmospheric models to improve representation of key linkages between the biogeochemistry of the ocean, marine aerosol formation and growth, and their combined effects on climate.

Published
2020

48. Observations of Cyanogen Bromide (BrCN) in the Global Atmosphere during the NASA Atmospheric Tomography mission (ATom) and Implications for Active Bromine Chemistry.

Author

Roberts, James, primary, Wang, Siyuan, additional, Veres, Patrick, additional, Neuman, J. Andrew, additional, Allen, Hannah, additional, Crounse, John, additional, Kim, Michelle, additional, Xu, Lu, additional, Wennberg, Paul, additional, Rollins, Andrew, additional, Bourgeois, Ilann, additional, Peischl, Jeff, additional, Ryerson, Thomas, additional, and Thompson, Chelsea, additional

Published
2021
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49. A portable, robust, stable, and tunable calibration source for gas-phase nitrous acid (HONO)

Author

Lao, Melodie, primary, Crilley, Leigh R., additional, Salehpoor, Leyla, additional, Furlani, Teles C., additional, Bourgeois, Ilann, additional, Neuman, J. Andrew, additional, Rollins, Andrew W., additional, Veres, Patrick R., additional, Washenfelder, Rebecca A., additional, Womack, Caroline C., additional, Young, Cora J., additional, and VandenBoer, Trevor C., additional

Published
2020
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