Search Results - "Neuman, J. A."

A large and ubiquitous source of atmospheric formic acid by Millet, D. B, Baasandorj, M, Farmer, D. K, Thornton, J. A, Baumann, K, Brophy, P, Chaliyakunnel, S, de Gouw, J. A, Graus, M, Hu, L, Koss, A, Lee, B. H, Lopez-Hilfiker, F. D, Neuman, J. A, Paulot, F, Peischl, J, Pollack, I. B, Ryerson, T. B, Warneke, C, Williams, B. J, Xu, J

“…Formic acid (HCOOH) is one of the most abundant acids in the atmosphere, with an important influence on precipitation chemistry and acidity. Here we employ a…”
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Ammonia sources in the California South Coast Air Basin and their impact on ammonium nitrate formation by Nowak, J. B., Neuman, J. A., Bahreini, R., Middlebrook, A. M., Holloway, J. S., McKeen, S. A., Parrish, D. D., Ryerson, T. B., Trainer, M.

“…Observations from the NOAA WP‐3D aircraft during CalNex in May and June 2010 are used to quantify ammonia (NH3) emissions from automobiles and dairy facilities…”
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HONO emission and production determined from airborne measurements over the Southeast U.S by Neuman, J. A., Trainer, M., Brown, S. S., Min, K.‐E., Nowak, J. B., Parrish, D. D., Peischl, J., Pollack, I. B., Roberts, J. M., Ryerson, T. B., Veres, P. R.

“…The sources and distribution of tropospheric nitrous acid (HONO) were examined using airborne measurements over the Southeast U.S. during the Southeast Nexus…”
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Quantifying atmospheric methane emissions from the Haynesville, Fayetteville, and northeastern Marcellus shale gas production regions by Peischl, J., Ryerson, T. B., Aikin, K. C., de Gouw, J. A., Gilman, J. B., Holloway, J. S., Lerner, B. M., Nadkarni, R., Neuman, J. A., Nowak, J. B., Trainer, M., Warneke, C., Parrish, D. D.

“…We present measurements of methane (CH4) taken aboard a NOAA WP‐3D research aircraft in 2013 over the Haynesville shale region in eastern Texas/northwestern…”
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Towards validation of ammonia (NH 3 ) measurements from the IASI satellite by Van Damme, M, Clarisse, L, Dammers, E, Liu, X, Nowak, J. B, Clerbaux, C, Flechard, C. R, Galy-Lacaux, C, Xu, W, Neuman, J. A, Tang, Y. S, Sutton, M. A, Erisman, J. W, Coheur, P. F

“…Limited availability of ammonia (NH3) observations is currently a barrier for effective monitoring of the nitrogen cycle. It prevents a full understanding of…”
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Trends in ozone, its precursors, and related secondary oxidation products in Los Angeles, California: A synthesis of measurements from 1960 to 2010 by Pollack, Ilana B., Ryerson, Thomas B., Trainer, Michael, Neuman, J. A., Roberts, James M., Parrish, David D.

“…Decreases in ozone (O3) observed in California's South Coast Air Basin (SoCAB) over the past five decades have resulted from decreases in local emissions of…”
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Transition from high- to low-NOx control of night-time oxidation in the southeastern US by Edwards, P. M., Aikin, K. C., Dube, W. P., Fry, J. L., Gilman, J. B., de Gouw, J. A., Graus, M. G., Hanisco, T. F., Holloway, J., Hübler, G., Kaiser, J., Keutsch, F. N., Lerner, B. M., Neuman, J. A., Parrish, D. D., Peischl, J., Pollack, I. B., Ravishankara, A. R., Roberts, J. M., Ryerson, T. B., Trainer, M., Veres, P. R., Wolfe, G. M., Warneke, C., Brown, S. S.

“…The influence of nitrogen oxides (NO x ) on daytime atmospheric oxidation cycles is well known, with clearly defined high- and low-NO x regimes. During the…”
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Observations of ozone transport from the free troposphere to the Los Angeles basin by Neuman, J. A., Trainer, M., Aikin, K. C., Angevine, W. M., Brioude, J., Brown, S. S., de Gouw, J. A., Dube, W. P., Flynn, J. H., Graus, M., Holloway, J. S., Lefer, B. L., Nedelec, P., Nowak, J. B., Parrish, D. D., Pollack, I. B., Roberts, J. M., Ryerson, T. B., Smit, H., Thouret, V., Wagner, N. L.

“…Analysis of in situ airborne measurements from the CalNex 2010 field experiment (Research at the Nexus of Air Quality and Climate Change) show that ozone in…”
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Surface and lightning sources of nitrogen oxides over the United States: Magnitudes, chemical evolution, and outflow by Hudman, R. C., Jacob, D. J., Turquety, S., Leibensperger, E. M., Murray, L. T., Wu, S., Gilliland, A. B., Avery, M., Bertram, T. H., Brune, W., Cohen, R. C., Dibb, J. E., Flocke, F. M., Fried, A., Holloway, J., Neuman, J. A., Orville, R., Perring, A., Ren, X., Sachse, G. W., Singh, H. B., Swanson, A., Wooldridge, P. J.

“…We use observations from two aircraft during the ICARTT campaign over the eastern United States and North Atlantic during summer 2004, interpreted with a…”
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Airborne and ground-based observations of a weekend effect in ozone, precursors, and oxidation products in the California South Coast Air Basin by Pollack, I. B., Ryerson, T. B., Trainer, M., Parrish, D. D., Andrews, A. E., Atlas, E. L., Blake, D. R., Brown, S. S., Commane, R., Daube, B. C., de Gouw, J. A., Dubé, W. P., Flynn, J., Frost, G. J., Gilman, J. B., Grossberg, N., Holloway, J. S., Kofler, J., Kort, E. A., Kuster, W. C., Lang, P. M., Lefer, B., Lueb, R. A., Neuman, J. A., Nowak, J. B., Novelli, P. C., Peischl, J., Perring, A. E., Roberts, J. M., Santoni, G., Schwarz, J. P., Spackman, J. R., Wagner, N. L., Warneke, C., Washenfelder, R. A., Wofsy, S. C., Xiang, B.

“…Airborne and ground‐based measurements during the CalNex (California Research at the Nexus of Air Quality and Climate Change) field study in May/June 2010 show…”
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Atmospheric emissions from the Deepwater Horizon spill constrain air-water partitioning, hydrocarbon fate, and leak rate by Ryerson, T. B., Aikin, K. C., Angevine, W. M., Atlas, E. L., Blake, D. R., Brock, C. A., Fehsenfeld, F. C., Gao, R.-S., de Gouw, J. A., Fahey, D. W., Holloway, J. S., Lack, D. A., Lueb, R. A., Meinardi, S., Middlebrook, A. M., Murphy, D. M., Neuman, J. A., Nowak, J. B., Parrish, D. D., Peischl, J., Perring, A. E., Pollack, I. B., Ravishankara, A. R., Roberts, J. M., Schwarz, J. P., Spackman, J. R., Stark, H., Warneke, C., Watts, L. A.

“…The fate of deepwater releases of gas and oil mixtures is initially determined by solubility and volatility of individual hydrocarbon species; these attributes…”
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Effects of changing power plant NOx emissions on ozone in the eastern United States: Proof of concept by Frost, G. J., McKeen, S. A., Trainer, M., Ryerson, T. B., Neuman, J. A., Roberts, J. M., Swanson, A., Holloway, J. S., Sueper, D. T., Fortin, T., Parrish, D. D., Fehsenfeld, F. C., Flocke, F., Peckham, S. E., Grell, G. A., Kowal, D., Cartwright, J., Auerbach, N., Habermann, T.

“…Recent decreases in nitrogen oxide (NOx = NO + NO2) emissions from eastern U.S. power plants and their effects on regional ozone are studied. Using the EPA…”
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Observation and modeling of the evolution of Texas power plant plumes by Zhou, W, Cohan, D. S, Pinder, R. W, Neuman, J. A, Holloway, J. S, Peischl, J, Ryerson, T. B, Nowak, J. B, Flocke, F, Zheng, W. G

“…During the second Texas Air Quality Study 2006 (TexAQS II), a full range of pollutants was measured by aircraft in eastern Texas during successive transects of…”
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Hydrocarbon Removal in Power Plant Plumes Shows Nitrogen Oxide Dependence of Hydroxyl Radicals by Gouw, J. A., Parrish, D. D., Brown, S. S., Edwards, P., Gilman, J. B., Graus, M., Hanisco, T. F., Kaiser, J., Keutsch, F. N., Kim, S.‐W., Lerner, B. M., Neuman, J. A., Nowak, J. B., Pollack, I. B., Roberts, J. M., Ryerson, T. B., Veres, P. R., Warneke, C., Wolfe, G. M.

“…During an airborne study in the Southeast United States, measured mixing ratios of biogenic hydrocarbons were systematically lower in air masses containing…”
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Validation of TES ammonia observations at the single pixel scale in the San Joaquin Valley during DISCOVER-AQ by Sun, Kang, Cady-Pereira, Karen, Miller, David J., Tao, Lei, Zondlo, Mark A., Nowak, John B., Neuman, J. A., Mikoviny, Tomas, Müller, Markus, Wisthaler, Armin, Scarino, Amy J., Hostetler, Chris A.

“…Ammonia measurements from a vehicle‐based, mobile open‐path sensor and those from aircraft were compared with Tropospheric Emission Spectrometer (TES) NH3…”
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Observations of inorganic bromine (HOBr, BrO, and Br2) speciation at Barrow, Alaska, in spring 2009 by Liao, J., Huey, L. G., Tanner, D. J., Flocke, F. M., Orlando, J. J., Neuman, J. A., Nowak, J. B., Weinheimer, A. J., Hall, S. R., Smith, J. N., Fried, A., Staebler, R. M., Wang, Y., Koo, J.-H., Cantrell, C. A., Weibring, P., Walega, J., Knapp, D. J., Shepson, P. B., Stephens, C. R.

“…Inorganic bromine plays a critical role in ozone and mercury depletions events (ODEs and MDEs) in the Arctic marine boundary layer. Direct observations of…”
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Analysis of satellite-derived Arctic tropospheric BrO columns in conjunction with aircraft measurements during ARCTAS and ARCPAC by Choi, S, Wang, Y, Salawitch, R. J, Canty, T, Joiner, J, Zeng, T, Kurosu, T. P, Chance, K, Richter, A, Huey, L. G, Liao, J, Neuman, J. A, Nowak, J. B, Dibb, J. E, Weinheimer, A. J, Diskin, G, Ryerson, T. B, da Silva, A, Curry, J, Kinnison, D, Tilmes, S, Levelt, P. F

“…We derive tropospheric column BrO during the ARCTAS and ARCPAC field campaigns in spring 2008 using retrievals of total column BrO from the satellite UV nadir…”
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Measurement of HONO, HNCO, and other inorganic acids by negative-ion proton-transfer chemical-ionization mass spectrometry (NI-PT-CIMS): application to biomass burning emissions by Roberts, J. M., Veres, P., Warneke, C., Neuman, J. A., Washenfelder, R. A., Brown, S. S., Baasandorj, M., Burkholder, J. B., Burling, I. R., Johnson, T. J., Yokelson, R. J., de Gouw, J.

“…A negative-ion proton-transfer chemical ionization mass spectrometric technique (NI-PT-CIMS), using acetate as the reagent ion, was applied to the measurement…”
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Characteristics of tropospheric ozone depletion events in the Arctic spring: analysis of the ARCTAS, ARCPAC, and ARCIONS measurements and satellite BrO observations by Koo, J.-H, Wang, Y, Kurosu, T. P, Chance, K, Rozanov, A, Richter, A, Oltmans, S. J, Thompson, A. M, Hair, J. W, Fenn, M. A, Weinheimer, A. J, Ryerson, T. B, Solberg, S, Huey, L. G, Liao, J, Dibb, J. E, Neuman, J. A, Nowak, J. B, Pierce, R. B, Natarajan, M, Al-Saadi, J

“…Arctic ozone depletion events (ODEs) are caused by halogen catalyzed ozone loss. In situ chemistry, advection of ozone-poor air mass, and vertical mixing in…”
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Bromine measurements in ozone depleted air over the Arctic Ocean by Neuman, J. A., Nowak, J. B., Huey, L. G., Burkholder, J. B., Dibb, J. E., Holloway, J. S., Liao, J., Peischl, J., Roberts, J. M., Ryerson, T. B., Scheuer, E., Stark, H., Stickel, R. E., Tanner, D. J., Weinheimer, A.

“…In situ measurements of ozone, photochemically active bromine compounds, and other trace gases over the Arctic Ocean in April 2008 are used to examine the…”
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