Search Results - "Marais, E. A."

Aqueous-phase mechanism for secondary organic aerosol formation from isoprene: application to the southeast United States and co-benefit of SO2 emission controls by Marais, E A, Jacob, D J, Jimenez, J L, Campuzano-Jost, P, Day, D A, W Hu, Krechmer, J, Zhu, L, Kim, P S, Miller, C C, Fisher, J A, Travis, K, K Yu, Hanisco, T F, Wolfe, G M, Arkinson, H L, Pye, H O T, Froyd, K D, Liao, J, McNeill, V F

“…Isoprene emitted by vegetation is an important precursor of secondary organic aerosol (SOA), but the mechanism and yields are uncertain. Aerosol is…”
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Isoprene emissions in Africa inferred from OMI observations of formaldehyde columns by Marais, E A, Jacob, D J, Kurosu, T P, Chance, K, Murphy, J G, Reeves, C, Mills, G, Casadio, S, Millet, D B, Barkley, M P, Paulot, F, Mao, J

“…We use 2005-2009 satellite observations of formaldehyde (HCHO) columns from the OMI instrument to infer biogenic isoprene emissions at monthly 1 × 1°…”
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Global dry deposition of nitrogen dioxide and sulfur dioxide inferred from space-based measurements by Nowlan, C. R., Martin, R. V., Philip, S., Lamsal, L. N., Krotkov, N. A., Marais, E. A., Wang, S., Zhang, Q.

“…A method is developed to estimate global NO2 and SO2 dry deposition fluxes at high spatial resolution (0.1°×0.1°) using satellite measurements from the Ozone…”
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Anthropogenic emissions in Nigeria and implications for atmospheric ozone pollution: A view from space by Marais, E.A., Jacob, D.J., Wecht, K., Lerot, C., Zhang, L., Yu, K., Kurosu, T.P., Chance, K., Sauvage, B.

“…Nigeria has a high population density and large fossil fuel resources but very poorly managed energy infrastructure. Satellite observations of formaldehyde…”
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Improved model of isoprene emissions in Africa using Ozone Monitoring Instrument (OMI) satellite observations of formaldehyde: implications for oxidants and particulate matter by Marais, E. A, Jacob, D. J, Guenther, A, Chance, K, Kurosu, T. P, Murphy, J. G, Reeves, C. E, Pye, H. O. T

“…We use a 2005–2009 record of isoprene emissions over Africa derived from Ozone Monitoring Instrument (OMI) satellite observations of formaldehyde (HCHO) to…”
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Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations by Franco, B., Hendrick, F., Van Roozendael, M., Müller, J.-F., Stavrakou, T., Marais, E. A., Bovy, B., Bader, W., Fayt, C., Hermans, C., Lejeune, B., Pinardi, G., Servais, C., Mahieu, E.

“…As an ubiquitous product of the oxidation of many volatile organic compounds (VOCs), formaldehyde (HCHO) plays a key role as a short-lived and reactive…”
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Aqueous-phase mechanism for secondary organic aerosol formation from isoprene: application to the Southeast United States and co-benefit of SO 2 emission controls by Marais, E A, Jacob, D J, Jimenez, J L, Campuzano-Jost, P, Day, D A, Hu, W, Krechmer, J, Zhu, L, Kim, P S, Miller, C C, Fisher, J A, Travis, K, Yu, K, Hanisco, T F, Wolfe, G M, Arkinson, H L, Pye, H O T, Froyd, K D, Liao, J, McNeill, V F

“…Isoprene emitted by vegetation is an important precursor of secondary organic aerosol (SOA), but the mechanism and yields are uncertain. Aerosol is…”
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Seasonality of isoprene emissions and oxidation products above the remote Amazon by Langford, B, House, E, Valach, A, Hewitt, C. N, Artaxo, P, Barkley, M. P, Brito, J, Carnell, E, Davison, B, MacKenzie, A. R, Marais, E. A, Newland, M. J, Rickard, A. R, Shaw, M. D, Yáñez-Serrano, A. M, Nemitz, E

“…The Amazon rainforest is the largest source of isoprene emissions to the atmosphere globally. Under low nitric oxide (NO) conditions ( i.e. at NO mixing ratios…”
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A new mechanism for atmospheric mercury redox chemistry: implications for the global mercury budget by Horowitz, Hannah M, Jacob, Daniel J, Zhang, Yanxu, Dibble, Theodore S, Slemr, Franz, Amos, Helen M, Schmidt, Johan A, Corbitt, Elizabeth S, Marais, Eloïse A, Sunderland, Elsie M

“…Mercury (Hg) is emitted to the atmosphere mainly as volatile elemental Hg0. Oxidation to water-soluble HgII plays a major role in Hg deposition to ecosystems…”
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A global anthropogenic emission inventory of atmospheric pollutants from sector- and fuel-specific sources (1970–2017): an application of the Community Emissions Data System (CEDS) by McDuffie, Erin E., Smith, Steven J., O'Rourke, Patrick, Tibrewal, Kushal, Venkataraman, Chandra, Marais, Eloise A., Zheng, Bo, Crippa, Monica, Brauer, Michael, Martin, Randall V.

“…Global anthropogenic emission inventories remain vital for understanding the sources of atmospheric pollution and the associated impacts on the environment,…”
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An evaluation of global organic aerosol schemes using airborne observations by Pai, Sidhant J, Heald, Colette L, Pierce, Jeffrey R, Farina, Salvatore C, Marais, Eloise A, Jimenez, Jose L, Campuzano-Jost, Pedro, Nault, Benjamin A, Middlebrook, Ann M, Coe, Hugh, Shilling, John E, Bahreini, Roya, Dingle, Justin H, Vu, Kennedy

“…Chemical transport models have historically struggled to accurately simulate the magnitude and variability of observed organic aerosol (OA), with previous…”
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Using satellite observations of tropospheric NO2 columns to infer long-term trends in US NOx emissions: the importance of accounting for the free tropospheric NO2 background by Silvern, Rachel F, Jacob, Daniel J, Mickley, Loretta J, Sulprizio, Melissa P, Travis, Katherine R, Marais, Eloise A, Cohen, Ronald C, Laughner, Joshua L, Choi, Sungyeon, Joiner, Joanna, Lamsal, Lok N

“…The National Emission Inventory (NEI) of the US Environmental Protection Agency (EPA) reports a steady decrease in US NOx emissions over the 2005–2017 period…”
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Long-term trends in air quality in major cities in the UK and India: a view from space by Vohra, Karn, Marais, Eloise A, Suckra, Shannen, Kramer, Louisa, Bloss, William J, Sahu, Ravi, Gaur, Abhishek, Tripathi, Sachchida N, Van Damme, Martin, Clarisse, Lieven, Coheur, Pierre-F

“…Air quality networks in cities can be costly and inconsistent and typically monitor a few pollutants. Space-based instruments provide global coverage spanning…”
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Measurement report: MAX-DOAS measurements characterise Central London ozone pollution episodes during 2022 heatwaves by Ryan, Robert G, Marais, Eloise A, Gershenson-Smith, Eleanor, Ramsay, Robbie, Muller, Jan-Peter, Tirpitz, Jan-Lukas, Frieß, Udo

“…Heatwaves are a substantial health threat in the UK, exacerbated by co-occurrence of ozone pollution episodes. Here we report on the first use of retrieved…”
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Evaluation of the WRF and CHIMERE models for the simulation of PM2.5 in large East African urban conurbations by Mazzeo, Andrea, Burrow, Michael, Quinn, Andrew, Marais, Eloise A, Singh, Ajit, Ng'ang'a, David, Gatari, Michael J, Pope, Francis D

“…Urban conurbations of East Africa are affected by harmful levels of air pollution. The paucity of local air quality networks and the absence of the capacity to…”
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Organic nitrate chemistry and its implications for nitrogen budgets in an isoprene- and monoterpene-rich atmosphere: constraints from aircraft (SEAC 4 RS) and ground-based (SOAS) observations in the Southeast US by Fisher, J A, Jacob, D J, Travis, K R, Kim, P S, Marais, E A, Miller, C Chan, Yu, K, Zhu, L, Yantosca, R M, Sulprizio, M P, Mao, J, Wennberg, P O, Crounse, J D, Teng, A P, Nguyen, T B, St Clair, J M, Cohen, R C, Romer, P, Nault, B A, Wooldridge, P J, Jimenez, J L, Campuzano-Jost, P, Day, D A, Hu, W, Shepson, P B, Xiong, F, Blake, D R, Goldstein, A H, Misztal, P K, Hanisco, T F, Wolfe, G M, Ryerson, T B, Wisthaler, A, Mikoviny, T

“…Formation of organic nitrates (RONO ) during oxidation of biogenic volatile organic compounds (BVOCs: isoprene, monoterpenes) is a significant loss pathway for…”
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Inconsistency of ammonium–sulfate aerosol ratios with thermodynamic models in the eastern US: a possible role of organic aerosol by Silvern, Rachel F, Jacob, Daniel J, Kim, Patrick S, Marais, Eloise A, Turner, Jay R, Campuzano-Jost, Pedro, Jimenez, Jose L

“…Thermodynamic models predict that sulfate aerosol (S(VI)  ≡  H2SO4(aq) + HSO4−+ SO42−) should take up available ammonia (NH3) quantitatively as ammonium (NH4+)…”
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Exploiting satellite measurements to explore uncertainties in UK bottom-up NOx emission estimates by Pope, Richard J, Kelly, Rebecca, Marais, Eloise A, Graham, Ailish M, Wilson, Chris, Harrison, Jeremy J, Moniz, Savio J A, Ghalaieny, Mohamed, Arnold, Steve R, Chipperfield, Martyn P

“…Nitrogen oxides (NOx, NO + NO2) are potent air pollutants which directly impact on human health and which aid the formation of other hazardous pollutants such…”
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Long-term observational constraints of organic aerosol dependence on inorganic species in the southeast US by Zheng, Yiqi, Thornton, Joel A, Ng, Nga Lee, Cao, Hansen, Henze, Daven K, McDuffie, Erin E, Hu, Weiwei, Jimenez, Jose L, Marais, Eloise A, Edgerton, Eric, Mao, Jingqiu

“…Organic aerosol (OA), with a large biogenic fraction in the summertime southeast US, adversely impacts air quality and human health. Stringent air quality…”
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Glyoxal Yield from Isoprene Oxidation and Relation to Formaldehyde: Chemical Mechanism, Constraints from SENEX Aircraft Observations, and Interpretation of OMI Satellite Data by Miller, Christopher Chan, Jacob, Daniel J., Marais, Eloise A., Yu, Karen, Travis, Katherine R., Kim, Patrick S., Fisher, Jenny A., Zhu, Lei, Wolfe, Glenn M., Hanisco, Thomas F., Keutsch, Frank N., Kaiser, Jennifer, Min, Kyung-Eun, Brown, Steven S., Washenfelder, Rebecca A., Gonzalez Abad, Gonzalo, Chance, Kelly

“…Glyoxal (CHOCHO) is produced in the atmosphere by the oxidation of volatile organic compounds(VOCs). Like formaldehyde (HCHO), another VOC oxidation product,…”
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