Search Results - "SHEPSON, Paul B"

Assessment of methane emissions from the U.S. oil and gas supply chain by Alvarez, Ramón A, Zavala-Araiza, Daniel, Lyon, David R, Allen, David T, Barkley, Zachary R, Brandt, Adam R, Davis, Kenneth J, Herndon, Scott C, Jacob, Daniel J, Karion, Anna, Kort, Eric A, Lamb, Brian K, Lauvaux, Thomas, Maasakkers, Joannes D, Marchese, Anthony J, Omara, Mark, Pacala, Stephen W, Peischl, Jeff, Robinson, Allen L, Shepson, Paul B, Sweeney, Colm, Townsend-Small, Amy, Wofsy, Steven C, Hamburg, Steven P

“…Methane emissions from the U.S. oil and natural gas supply chain were estimated by using ground-based, facility-scale measurements and validated with aircraft…”
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Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion by Wang, Siyuan, McNamara, Stephen M., Moore, Christopher W., Obrist, Daniel, Steffen, Alexandra, Shepson, Paul B., Staebler, Ralf M., Raso, Angela R. W., Pratt, Kerri A.

“…Bromine atoms play a central role in atmospheric reactive halogen chemistry, depleting ozone and elemental mercury, thereby enhancing deposition of toxic…”
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Reconciling divergent estimates of oil and gas methane emissions by Zavala-Araiza, Daniel, Lyon, David R., Alvarez, Ramón A., Davis, Kenneth J., Harriss, Robert, Herndon, Scott C., Karion, Anna, Kort, Eric Adam, Lamb, Brian K., Lan, Xin, Marchese, Anthony J., Pacala, Stephen W., Robinson, Allen L., Shepson, Paul B., Sweeney, Colm, Talbot, Robert, Townsend-Small, Amy, Yacovitch, Tara I., Zimmerle, Daniel J., Hamburg, Steven P.

“…Published estimates of methane emissions from atmospheric data (top-down approaches) exceed those from source-based inventories (bottom-up approaches), leading…”
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Toward a better understanding and quantification of methane emissions from shale gas development by Caulton, Dana R., Shepson, Paul B., Santoro, Renee L., Sparks, Jed P., Howarth, Robert W., Ingraffea, Anthony R., Cambaliza, Maria O. L., Sweeney, Colm, Karion, Anna, Davis, Kenneth J., Stirm, Brian H., Montzka, Stephen A., Miller, Ben R.

“…The identification and quantification of methane emissions from natural gas production has become increasingly important owing to the increase in the natural…”
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Highly functionalized organic nitrates in the southeast United States: Contribution to secondary organic aerosol and reactive nitrogen budgets by Lee, Ben H., Mohr, Claudia, Lopez-Hilfiker, Felipe D., Lutz, Anna, Hallquist, Mattias, Lee, Lance, Romer, Paul, Cohen, Ronald C., Iyer, Siddharth, Kurtén, Theo, Hu, Weiwei, Day, Douglas A., Campuzano-Jost, Pedro, Jimenez, Jose L., Xu, Lu, Ng, Nga Lee, Guo, Hongyu, Weber, Rodney J., Wild, Robert J., Brown, Steven S., Koss, Abigail, de Gouw, Joost, Olson, Kevin, Goldstein, Allen H., Seco, Roger, Kim, Saewung, McAvey, Kevin, Shepson, Paul B., Starn, Tim, Baumann, Karsten, Edgerton, Eric S., Liu, Jiumeng, Shilling, John E., Miller, David O., Brune, William, Schobesberger, Siegfried, D’Ambro, Emma L., Thornton, Joel A.

“…Speciated particle-phase organic nitrates (pONs) were quantified using online chemical ionization MS during June and July of 2013 in rural Alabama as part of…”
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Toward quantification and source sector identification of fossil fuel CO2 emissions from an urban area: Results from the INFLUX experiment by Turnbull, Jocelyn C., Sweeney, Colm, Karion, Anna, Newberger, Timothy, Lehman, Scott J., Tans, Pieter P., Davis, Kenneth J., Lauvaux, Thomas, Miles, Natasha L., Richardson, Scott J., Cambaliza, Maria Obiminda, Shepson, Paul B., Gurney, Kevin, Patarasuk, Risa, Razlivanov, Igor

“…The Indianapolis Flux Experiment (INFLUX) aims to develop and assess methods for quantifying urban greenhouse gas emissions. Here we use CO2, 14CO2, and CO…”
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pH-dependent production of molecular chlorine, bromine, and iodine from frozen saline surfaces by Halfacre, John W, Shepson, Paul B, Pratt, Kerri A

“…The mechanisms of molecular halogen production from frozen saline surfaces remain incompletely understood, limiting our ability to predict atmospheric…”
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Assessing the Methane Emissions from Natural Gas-Fired Power Plants and Oil Refineries by Lavoie, Tegan N, Shepson, Paul B, Gore, Chloe A, Stirm, Brian H, Kaeser, Robert, Wulle, Bernard, Lyon, David, Rudek, Joseph

“…Presently, there is high uncertainty in estimates of methane (CH4) emissions from natural gas-fired power plants (NGPP) and oil refineries, two major end users…”
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Modeling the Current and Future Roles of Particulate Organic Nitrates in the Southeastern United States by Pye, Havala O. T, Luecken, Deborah J, Xu, Lu, Boyd, Christopher M, Ng, Nga L, Baker, Kirk R, Ayres, Benjamin R, Bash, Jesse O, Baumann, Karsten, Carter, William P. L, Edgerton, Eric, Fry, Juliane L, Hutzell, William T, Schwede, Donna B, Shepson, Paul B

“…Organic nitrates are an important aerosol constituent in locations where biogenic hydrocarbon emissions mix with anthropogenic NO x sources. While regional and…”
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Nitric acid photolysis on forest canopy surface as a source for tropospheric nitrous acid by Zhou, Xianliang, Zhang, Ning, TerAvest, Michaela, Tang, David, Hou, Jian, Bertman, Steve, Alaghmand, Marjan, Shepson, Paul B., Carroll, Mary Anne, Griffith, Stephen, Dusanter, Sebastien, Stevens, Philip S.

“…Photolysis of nitrous acid generates hydroxyl radicals — a key atmospheric oxidant. Measurements at a forest in Michigan suggest that sunlight-induced…”
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Inland Sea Spray Aerosol Transport and Incomplete Chloride Depletion: Varying Degrees of Reactive Processing Observed during SOAS by Bondy, Amy L., Wang, Bingbing, Laskin, Alexander, Craig, Rebecca L., Nhliziyo, Manelisi V., Bertman, Steven B., Pratt, Kerri A., Shepson, Paul B., Ault, Andrew P.

“…Multiphase reactions involving sea spray aerosol (SSA) impact trace gas budgets in coastal regions by acting as a reservoir for oxidized nitrogen and sulfur…”
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Active molecular iodine photochemistry in the Arctic by Raso, Angela R. W., Custard, Kyle D., May, Nathaniel W., Tanner, David, Newburn, Matt K., Walker, Lawrence, Moore, Ronald J., Huey, L. G., Alexander, Liz, Shepson, Paul B., Pratt, Kerri A.

“…During springtime, the Arctic atmospheric boundary layer undergoes frequent rapid depletions in ozone and gaseous elemental mercury due to reactions with…”
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A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface by Artiglia, Luca, Edebeli, Jacinta, Orlando, Fabrizio, Chen, Shuzhen, Lee, Ming-Tao, Corral Arroyo, Pablo, Gilgen, Anina, Bartels-Rausch, Thorsten, Kleibert, Armin, Vazdar, Mario, Andres Carignano, Marcelo, Francisco, Joseph S., Shepson, Paul B., Gladich, Ivan, Ammann, Markus

“…Oxidation of bromide in aqueous environments initiates the formation of molecular halogen compounds, which is important for the global tropospheric ozone…”
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Photochemical production of molecular bromine in Arctic surface snowpacks by Pratt, Kerri A., Custard, Kyle D., Shepson, Paul B., Douglas, Thomas A., Pöhler, Denis, General, Stephan, Zielcke, Johannes, Simpson, William R., Platt, Ulrich, Tanner, David J., Gregory Huey, L., Carlsen, Mark, Stirm, Brian H.

“…Following the spring-time polar sunrise, ozone concentrations in the lower troposphere episodically decline to near-zero levels. Measurements on Alaskan snow…”
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Observations of bromine monoxide transport in the Arctic sustained on aerosol particles by Peterson, Peter K, Pöhler, Denis, Sihler, Holger, Zielcke, Johannes, General, Stephan, Frieß, Udo, Platt, Ulrich, Simpson, William R, Nghiem, Son V, Shepson, Paul B, Stirm, Brian H, Dhaniyala, Suresh, Wagner, Thomas, Caulton, Dana R, Fuentes, Jose D, Pratt, Kerri A

“…The return of sunlight in the polar spring leads to the production of reactive halogen species from the surface snowpack, significantly altering the chemical…”
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Air-Snow Interactions and Atmospheric Chemistry by Dominé, Florent, Shepson, Paul B.

“…The presence of snow greatly perturbs the composition of near-surface polar air, and the higher concentrations of hydroxyl radicals (OH) observed result in a…”
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High levels of molecular chlorine in the Arctic atmosphere by Liao, Jin, Huey, L. Gregory, Liu, Zhen, Tanner, David J., Cantrell, Chris A., Orlando, John J., Flocke, Frank M., Shepson, Paul B., Weinheimer, Andrew J., Hall, Samuel R., Ullmann, Kirk, Beine, Harry J., Wang, Yuhang, Ingall, Ellery D., Stephens, Chelsea R., Hornbrook, Rebecca S., Apel, Eric C., Riemer, Daniel, Fried, Alan, Mauldin, Roy L., Smith, James N., Staebler, Ralf M., Neuman, J. Andrew, Nowak, John B.

“…Chlorine radicals function as a strong atmospheric oxidant, particularly in polar regions, where levels of hydroxyl radicals are low. Measurements in the…”
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Aircraft measurement of HONO vertical profiles over a forested region by Zhang, Ning, Zhou, Xianliang, Shepson, Paul B., Gao, Honglian, Alaghmand, Marjan, Stirm, Brian

“…Here we present the first HONO vertical profiles in the atmospheric boundary layer (BL) and the lower free troposphere (FT) over a forested region in northern…”
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Nontargeted Tandem Mass Spectrometry Analysis Reveals Diversity and Variability in Aerosol Functional Groups across Multiple Sites, Seasons, and Times of Day by Ditto, Jenna C, Joo, Taekyu, Slade, Jonathan H, Shepson, Paul B, Ng, Nga L, Gentner, Drew R

“…Organic aerosol (OA) is a complex mixture of compounds with diverse elemental and structural features, and its composition affects its health and environmental…”
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Bromine atom production and chain propagation during springtime Arctic ozone depletion events in Barrow, Alaska by Thompson, Chelsea R, Shepson, Paul B, Liao, Jin, Huey, L. Greg, Cantrell, Chris, Flocke, Frank, Orlando, John

“…Ozone depletion events (ODEs) in the Arctic are primarily controlled by a bromine radical-catalyzed destruction mechanism that depends on the efficient…”
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