Search Results - "Cooper, O. R"

Increasing springtime ozone mixing ratios in the free troposphere over western North America by Cooper, O. R, Parrish, D. D, Stohl, A, Trainer, M, Nédélec, P, Thouret, V, Cammas, J. P, Oltmans, S. J, Johnson, B. J, Tarasick, D, Leblanc, T, McDermid, I. S, Jaffe, D, Gao, R, Stith, J, Ryerson, T, Aikin, K, Campos, T, Weinheimer, A, Avery, M. A

“…In the lowermost layer of the atmosphere—the troposphere—ozone is an important source of the hydroxyl radical, an oxidant that breaks down most pollutants and…”
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Long-term changes in lower tropospheric baseline ozone concentrations at northern mid-latitudes by Parrish, D. D, Law, K. S, Staehelin, J, Derwent, R, Cooper, O. R, Tanimoto, H, Volz-Thomas, A, Gilge, S, Scheel, H.-E, Steinbacher, M, Chan, E

“…Changes in baseline (here understood as representative of continental to hemispheric scales) tropospheric O3 concentrations that have occurred at northern…”
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Historical (1850–2000) gridded anthropogenic and biomass burning emissions of reactive gases and aerosols: methodology and application by Lamarque, J.-F., Bond, T. C., Eyring, V., Granier, C., Heil, A., Klimont, Z., Lee, D., Liousse, C., Mieville, A., Owen, B., Schultz, M. G., Shindell, D., Smith, S. J., Stehfest, E., Van Aardenne, J., Cooper, O. R., Kainuma, M., Mahowald, N., McConnell, J. R., Naik, V., Riahi, K., van Vuuren, D. P.

“…We present and discuss a new dataset of gridded emissions covering the historical period (1850–2000) in decadal increments at a horizontal resolution of 0.5°…”
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Stratospheric influence on surface ozone in the Los Angeles area during late spring and early summer of 2010 by Langford, A. O., Brioude, J., Cooper, O. R., Senff, C. J., Alvarez II, R. J., Hardesty, R. M., Johnson, B. J., Oltmans, S. J.

“…The influence of stratosphere‐to‐troposphere transport (STT) on surface ozone (O3) concentrations in the greater Los Angeles area during the CalNex and…”
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Long-term changes in lower tropospheric baseline ozone concentrations: Comparing chemistry-climate models and observations at northern midlatitudes by Parrish, D. D., Lamarque, J.-F., Naik, V., Horowitz, L., Shindell, D. T., Staehelin, J., Derwent, R., Cooper, O. R., Tanimoto, H., Volz-Thomas, A., Gilge, S., Scheel, H.-E., Steinbacher, M., Fröhlich, M.

“…Two recent papers have quantified long‐term ozone (O3) changes observed at northern midlatitude sites that are believed to represent baseline (here understood…”
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Lower tropospheric ozone at northern midlatitudes: Changing seasonal cycle by Parrish, D. D., Law, K. S., Staehelin, J., Derwent, R., Cooper, O. R., Tanimoto, H., Volz-Thomas, A., Gilge, S., Scheel, H.-E., Steinbacher, M., Chan, E.

“…At northern midlatitudes the abundance of tropospheric O3 has increased by a factor of approximately 2 since the 1950s. The cause of this increase is generally…”
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Transport of NOx in East Asia identified by satellite and in situ measurements and Lagrangian particle dispersion model simulations by Lee, H.-J., Kim, S.-W., Brioude, J., Cooper, O. R., Frost, G. J., Kim, C.-H., Park, R. J., Trainer, M., Woo, J.-H.

“…Nitrogen dioxide (NO2) columns observed from space have been useful in detecting the increase of nitrogen oxides (NOx) emissions in East Asia, particularly…”
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Measurement of western U.S. baseline ozone from the surface to the tropopause and assessment of downwind impact regions by Cooper, O. R., Oltmans, S. J., Johnson, B. J., Brioude, J., Angevine, W., Trainer, M., Parrish, D. D., Ryerson, T. R., Pollack, I., Cullis, P. D., Ives, M. A., Tarasick, D. W., Al-Saadi, J., Stajner, I.

“…Since 1997, baseline ozone monitoring from the surface to the tropopause along the U.S. west coast has been limited to the weekly ozonesondes from Trinidad…”
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Volatile organic compounds composition of merged and aged forest fire plumes from Alaska and western Canada by de Gouw, J. A., Warneke, C., Stohl, A., Wollny, A. G., Brock, C. A., Cooper, O. R., Holloway, J. S., Trainer, M., Fehsenfeld, F. C., Atlas, E. L., Donnelly, S. G., Stroud, V., Lueb, A.

“…The NOAA WP‐3 aircraft intercepted aged forest fire plumes from Alaska and western Canada during several flights of the NEAQS‐ITCT 2k4 mission in 2004…”
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Ozone variability and halogen oxidation within the Arctic and sub-Arctic springtime boundary layer by Gilman, J. B., Burkhart, J. F., Lerner, B. M., Williams, E. J., Kuster, W. C., Goldan, P. D., Murphy, P. C., Warneke, C., Fowler, C., Montzka, S. A., Miller, B. R., Miller, L., Oltmans, S. J., Ryerson, T. B., Cooper, O. R., Stohl, A., de Gouw, J. A.

“…The influence of halogen oxidation on the variabilities of ozone (O3) and volatile organic compounds (VOCs) within the Arctic and sub-Arctic atmospheric…”
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High-resolution tropospheric ozone fields for INTEX and ARCTAS from IONS ozonesondes by Tarasick, D. W., Jin, J. J., Fioletov, V. E., Liu, G., Thompson, A. M., Oltmans, S. J., Liu, J., Sioris, C. E., Liu, X., Cooper, O. R., Dann, T., Thouret, V.

“…The IONS‐04, IONS‐06, and ARC‐IONS ozone sounding campaigns over North America in 2004, 2006, and 2008 obtained approximately 1400 profiles, in five series of…”
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Cloud condensation nuclei as a modulator of ice processes in Arctic mixed-phase clouds by Lance, S., Shupe, M. D., Feingold, G., Brock, C. A., Cozic, J., Holloway, J. S., Moore, R. H., Nenes, A., Schwarz, J. P., Spackman, J. R., Froyd, K. D., Murphy, D. M., Brioude, J., Cooper, O. R., Stohl, A., Burkhart, J. F.

“…We propose that cloud condensation nuclei (CCN) concentrations are important for modulating ice formation of Arctic mixed-phase clouds, through modification of…”
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Ozone production in transpacific Asian pollution plumes and implications for ozone air quality in California by Hudman, R. C., Jacob, D. J., Cooper, O. R., Evans, M. J., Heald, C. L., Park, R. J., Fehsenfeld, F., Flocke, F., Holloway, J., Hübler, G., Kita, K., Koike, M., Kondo, Y., Neuman, A., Nowak, J., Oltmans, S., Parrish, D., Roberts, J. M., Ryerson, T.

“…We examine the ozone production efficiency in transpacific Asian pollution plumes, and the implications for ozone air quality in California, by using aircraft…”
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Long-term trends in aerosol and precipitation composition over the western North Atlantic Ocean at Bermuda by Keene, W. C, Moody, J. L, Galloway, J. N, Prospero, J. M, Cooper, O. R, Eckhardt, S, Maben, J. R

“…Since the 1980s, emissions of SO2 and NOx (NO + NO2) from anthropogenic sources in the United States (US), Canada, and Europe have decreased significantly…”
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A case study of transpacific warm conveyor belt transport: Influence of merging airstreams on trace gas import to North America by Cooper, O. R., Forster, C., Parrish, D., Trainer, M., Dunlea, E., Ryerson, T., Hübler, G., Fehsenfeld, F., Nicks, D., Holloway, J., de Gouw, J., Warneke, C., Roberts, J. M., Flocke, F., Moody, J.

“…The warm conveyor belt (WCB), the major cloud‐forming airstream of midlatitude cyclones, is the primary mechanism for rapidly transporting air pollution from…”
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Effect of biomass burning on marine stratocumulus clouds off the California coast by Brioude, J., Cooper, O. R., Feingold, G., Trainer, M., Freitas, S. R., Kowal, D., Ayers, J.K., Prins, E., Minnis, P., McKeen, S. A., Frost, G. J., Hsie, E.-Y.

“…Aerosol-cloud interactions are considered to be one of the most important and least known forcings in the climate system. Biomass burning aerosols are of…”
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An analysis of the mechanisms of North American pollutant transport to the central North Atlantic lower free troposphere by Owen, R. C., Cooper, O. R., Stohl, A., Honrath, R. E.

“…We use the FLEXPART Lagrangian particle dispersion model and observations from the PICO‐NARE station to identify and analyze the transport of North American…”
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Black carbon measurements in the Pearl River Delta region of China by Huang, X.-F., Gao, R. S., Schwarz, J. P., He, L.-Y., Fahey, D. W., Watts, L. A., McComiskey, A., Cooper, O. R., Sun, T.-L., Zeng, L.-W., Hu, M., Zhang, Y.-H.

“…The Pearl River Delta (PRD) region in southeastern China is one of the most polluted industrial and metropolitan areas in the world. We report single‐particle…”
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Flow climatology for physicochemical properties of dichotomous aerosol over the western North Atlantic Ocean at Bermuda by Moody, J. L, Keene, W. C, Cooper, O. R, Voss, K. J, Aryal, R, Eckhardt, S, Holben, B, Maben, J. R, Izaguirre, M. A, Galloway, J. N

“…Dichotomous aerosols (nominal super- and sub-μm-diameter size fractions) in sectored on-shore flow were sampled daily from July 2006 through June 2009, at the…”
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Biomass burning and anthropogenic sources of CO over New England in the summer 2004 by Warneke, C., de Gouw, J. A., Stohl, A., Cooper, O. R., Goldan, P. D., Kuster, W. C., Holloway, J. S., Williams, E. J., Lerner, B. M., McKeen, S. A., Trainer, M., Fehsenfeld, F. C., Atlas, E. L., Donnelly, S. G., Stroud, Verity, Lueb, Amy, Kato, S.

“…During the summer of 2004 large wildfires were burning in Alaska and Canada, and part of the emissions were transported toward the northeast United States,…”
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