Search Results - "Cohen, R C"

An Observational Perspective on the Atmospheric Impacts of Alkyl and Multifunctional Nitrates on Ozone and Secondary Organic Aerosol by Perring, A. E, Pusede, S. E, Cohen, R. C

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Trends in OMI NO2 observations over the United States: effects of emission control technology and the economic recession by Russell, A R, Valin, L C, Cohen, R C

“…Observations of tropospheric NO2 vertical column densities over the United States (US) for 2005-2011 are evaluated using the OMI Berkeley High Resolution…”
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On the observed response of ozone to NOx and VOC reactivity reductions in San Joaquin Valley California 1995-present by Pusede, S E, Cohen, R C

“…We describe the effects of nitrogen oxide (NOx ) and organic reactivity reductions on the frequency of high ozone days in California's San Joaquin Valley. We…”
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Steps towards a mechanistic model of global soil nitric oxide emissions: implementation and space based-constraints by Hudman, R. C, Moore, N. E, Mebust, A. K, Martin, R. V, Russell, A. R, Valin, L. C, Cohen, R. C

“…Soils have been identified as a major source (~15%) of global nitrogen oxide (NOx) emissions. Parameterizations of soil NOx emissions (SNOx) commonly used in…”
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Variations of OH radical in an urban plume inferred from NO2 column measurements by Valin, L. C., Russell, A. R., Cohen, R. C.

“…The evolution of atmospheric composition downwind of a city depends strongly on the concentration of OH within the plume. We use space‐based observations of…”
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Observations of gas- and aerosol-phase organic nitrates at BEACHON-RoMBAS 2011 by Fry, J. L, Draper, D. C, Zarzana, K. J, Campuzano-Jost, P, Day, D. A, Jimenez, J. L, Brown, S. S, Cohen, R. C, Kaser, L, Hansel, A, Cappellin, L, Karl, T, Hodzic Roux, A, Turnipseed, A, Cantrell, C, Lefer, B. L, Grossberg, N

“…At the Rocky Mountain Biogenic Aerosol Study (BEACHON-RoMBAS) field campaign in the Colorado front range, July–August 2011, measurements of gas- and…”
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Evidence for NOx Control over Nighttime SOA Formation by ROLLINS, A. W, BROWNE, E. C, COHEN, R. C, MIN, K.-E, PUSEDE, S. E, WOOLDRIDGE, P. J, GENTNER, D. R, GOLDSTEIN, A. H, LIU, S, DAY, D. A, RUSSELL, L. M

“…Organic aerosols account for about half of the total mass of small (submicrometer) particles in the troposphere, and most of them are believed to form through…”
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Effects of biogenic nitrate chemistry on the NOx lifetime in remote continental regions by Browne, E C, Cohen, R C

“…We present an analysis of the NOx budget in conditions of low NOx (NOx = NO + NO2 ) and high biogenic volatile organic compound (BVOC) concentrations that are…”
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Biomass burning dominates brown carbon absorption in the rural southeastern United States by Washenfelder, R. A., Attwood, A. R., Brock, C. A., Guo, H., Xu, L., Weber, R. J., Ng, N. L., Allen, H. M., Ayres, B. R., Baumann, K., Cohen, R. C., Draper, D. C., Duffey, K. C., Edgerton, E., Fry, J. L., Hu, W. W., Jimenez, J. L., Palm, B. B., Romer, P., Stone, E. A., Wooldridge, P. J., Brown, S. S.

“…Brown carbon aerosol consists of light‐absorbing organic particulate matter with wavelength‐dependent absorption. Aerosol optical extinction, absorption, size…”
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Insights into hydroxyl measurements and atmospheric oxidation in a California forest by Mao, J, Ren, X, Zhang, L, Van Duin, D. M, Cohen, R. C, Park, J.-H, Goldstein, A. H, Paulot, F, Beaver, M. R, Crounse, J. D, Wennberg, P. O, DiGangi, J. P, Henry, S. B, Keutsch, F. N, Park, C, Schade, G. W, Wolfe, G. M, Thornton, J. A, Brune, W. H

“…The understanding of oxidation in forest atmospheres is being challenged by measurements of unexpectedly large amounts of hydroxyl (OH). A significant number…”
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Effects of model resolution on the interpretation of satellite NO2 observations by Valin, L C, Russell, A R, Hudman, R C, Cohen, R C

“…Inference of NOx emissions (NO+NO2 ) from satellite observations of tropospheric NO2 column requires knowledge of NOx lifetime, usually provided by chemical…”
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Organic nitrate aerosol formation via NO3 + biogenic volatile organic compounds in the southeastern United States by Ayres, B R, Allen, H M, Draper, D C, Brown, S S, Wild, R J, Jimenez, J L, Day, D A, Campuzano-Jost, P, Hu, W, de Gouw, J

“…Gas- and aerosol-phase measurements of oxidants, biogenic volatile organic compounds (BVOCs) and organic nitrates made during the Southern Oxidant and Aerosol…”
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Understanding the impact of recent advances in isoprene photooxidation on simulations of regional air quality by Xie, Y, Paulot, F, Carter, W. P. L, Nolte, C. G, Luecken, D. J, Hutzell, W. T, Wennberg, P. O, Cohen, R. C, Pinder, R. W

“…The CMAQ (Community Multiscale Air Quality) us model in combination with observations for INTEX-NA/ICARTT (Intercontinental Chemical Transport Experiment–North…”
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On the effectiveness of nitrogen oxide reductions as a control over ammonium nitrate aerosol by Pusede, S. E, Duffey, K. C, Shusterman, A. A, Saleh, A, Laughner, J. L, Wooldridge, P. J, Zhang, Q, Parworth, C. L, Kim, H, Capps, S. L, Valin, L. C, Cappa, C. D, Fried, A, Walega, J, Nowak, J. B, Weinheimer, A. J, Hoff, R. M, Berkoff, T. A, Beyersdorf, A. J, Olson, J, Crawford, J. H, Cohen, R. C

“…Nitrogen oxides (NOx) have fallen steadily across the US over the last 15 years. At the same time, NOx concentrations decrease on weekends relative to…”
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On the role of monoterpene chemistry in the remote continental boundary layer by Browne, E. C, Wooldridge, P. J, Min, K.-E, Cohen, R. C

“…The formation of organic nitrates (RONO2) represents an important NOx (NOx = NO + NO2) sink in the remote and rural continental atmosphere, thus impacting…”
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Hydroxy nitrate production in the OH-initiated oxidation of alkenes by Teng, A. P, Crounse, J. D, Lee, L, St. Clair, J. M, Cohen, R. C, Wennberg, P. O

“…Alkenes are oxidized rapidly in the atmosphere by addition of OH and subsequently O2 leading to the formation of β-hydroxy peroxy radicals. These peroxy…”
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Anthropogenic Control over Wintertime Oxidation of Atmospheric Pollutants by Haskins, J. D., Lopez-Hilfiker, F. D., Lee, B. H., Shah, V., Wolfe, G. M., DiGangi, J., Fibiger, D., McDuffie, E. E., Veres, P., Schroder, J. C., Campuzano-Jost, P., Day, D. A., Jimenez, J. L., Weinheimer, A., Sparks, T., Cohen, R. C., Campos, T., Sullivan, A., Guo, H., Weber, R., Dibb, J., Greene, J., Fiddler, M., Bililign, S., Jaegle, L., Brown, S. S., Thornton, J. A.

“…Anthropogenic air pollutants such as nitrogen oxides (NO(x) = NO + NO(2)), sulfur dioxide (SO(2)), and volatile organic compounds (VOC), among others, are…”
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Importance of biogenic precursors to the budget of organic nitrates: observations of multifunctional organic nitrates by CIMS and TD-LIF during BEARPEX 2009 by Beaver, M. R, Clair, J. M. St, Paulot, F, Spencer, K. M, Crounse, J. D, LaFranchi, B. W, Min, K. E, Pusede, S. E, Wooldridge, P. J, Schade, G. W, Park, C, Cohen, R. C, Wennberg, P. O

“…Alkyl and multifunctional organic nitrates, molecules of the chemical form RONO2, are products of chain terminating reactions in the tropospheric HOx and NOx…”
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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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Evidence for a nitrous acid (HONO) reservoir at the ground surface in Bakersfield, CA, during CalNex 2010 by VandenBoer, T. C., Markovic, M. Z., Sanders, J. E., Ren, X., Pusede, S. E., Browne, E. C., Cohen, R. C., Zhang, L., Thomas, J., Brune, W. H., Murphy, J. G.

“…Measurements of HONO(g) and particulate nitrite (NO2−(p)) were made with a modified Ambient Ion Monitor–Ion Chromatography (AIM‐IC) instrument during…”
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