Search Results - "Choi, Sungyeon"

Abrupt decline in tropospheric nitrogen dioxide over China after the outbreak of COVID-19 by Liu, Fei, Page, Aaron, Strode, Sarah A., Yoshida, Yasuko, Choi, Sungyeon, Zheng, Bo, Lamsal, Lok N., Li, Can, Krotkov, Nickolay A., Eskes, Henk, van der A, Ronald, Veefkind, Pepijn, Levelt, Pieternel F., Hauser, Oliver P., Joiner, Joanna

“…Chinese COVID-19 policies indirectly lead to reduced fuel use and reduction in environmental emissions. China’s policy interventions to reduce the spread of…”
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Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O 3 in the Arctic by Huang, Jiayue, Jaeglé, Lyatt, Chen, Qianjie, Alexander, Becky, Sherwen, Tomás, Evans, Mat J., Theys, Nicolas, Choi, Sungyeon

“…We use the GEOS-Chem chemical transport model to examine the influence of bromine release from blowing-snow sea salt aerosol (SSA) on springtime bromine…”
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Ozone Monitoring Instrument (OMI) Aura nitrogen dioxide standard product version 4.0 with improved surface and cloud treatments by Lamsal, Lok N, Krotkov, Nickolay A, Vasilkov, Alexander, Marchenko, Sergey, Qin, Wenhan, Yang, Eun-Su, Fasnacht, Zachary, Joiner, Joanna, Choi, Sungyeon, Haffner, David, Swartz, William H, Fisher, Bradford, Bucsela, Eric

“…We present a new and improved version (V4.0) of the NASA standard nitrogen dioxide (NO2) product from the Ozone Monitoring Instrument (OMI) on the Aura…”
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Revised estimates of NO2 reductions during the COVID-19 lockdowns using updated TROPOMI NO2 retrievals and model simulations by Fisher, Brad L., Lamsal, Lok N., Fasnacht, Zachary, Oman, Luke D., Joiner, Joanna, Krotkov, Nickolay A., Choi, Sungyeon, Qin, Wenhan, Yang, Eun-Su

“…The TROPOspheric Monitoring Instrument (TROPOMI) observed unprecedented declines in NO2 vertical column densities (VCD) over the world's most densely populated…”
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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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Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O3 in the Arctic by Huang, Jiayue, Jaeglé, Lyatt, Chen, Qianjie, Alexander, Becky, Sherwen, Tomás, Evans, Mat J, Theys, Nicolas, Choi, Sungyeon

“…We use the GEOS-Chem chemical transport model to examine the influence of bromine release from blowing-snow sea salt aerosol (SSA) on springtime bromine…”
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A New Global Anthropogenic SO2 Emission Inventory for the Last Decade: A Mosaic of Satellite-Derived and Bottom-Up Emissions by Liu, Fei, Choi, Sungyeon, Li, Can, Fioletov, Vitali E., McLinden, Chris A., Joiner, Joanna, Krotkov, Nickolay A., Bian, Huisheng, Janssens-Maenhout, Greet, Darmenov, Anton S., da Silva, Arlindo M.

“…Sulfur dioxide (SO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor have been used to detect emissions from large point sources…”
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Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O.sub.3 in the Arctic by Huang, Jiayue, Jaeglé, Lyatt, Chen, Qianjie, Alexander, Becky, Sherwen, Tomás, Evans, Mat J, Theys, Nicolas, Choi, Sungyeon

“…We use the GEOS-Chem chemical transport model to examine the influence of bromine release from blowing-snow sea salt aerosol (SSA) on springtime bromine…”
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High-resolution mapping of nitrogen oxide emissions in large US cities from TROPOMI retrievals of tropospheric nitrogen dioxide columns by Liu, Fei, Beirle, Steffen, Joiner, Joanna, Choi, Sungyeon, Tao, Zhining, Knowland, K. Emma, Smith, Steven J, Tong, Daniel Q, Ma, Siqi, Fasnacht, Zachary T, Wagner, Thomas

“…Satellite-derived spatiotemporal patterns of nitrogen oxide (NOx) emissions can improve accuracy of emission inventories to better support air quality and…”
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Characterization of errors in satellite-based HCHO / NO.sub.2 tropospheric column ratios with respect to chemistry, column-to-PBL translation, spatial representation, and retrieval uncertainties by Souri, Amir H, Johnson, Matthew S, Wolfe, Glenn M, Crawford, James H, Fried, Alan, Wisthaler, Armin, Brune, William H, Blake, Donald R, Weinheimer, Andrew J, Verhoelst, Tijl, Compernolle, Steven, Pinardi, Gaia, Vigouroux, Corinne, Langerock, Bavo, Choi, Sungyeon, Lamsal, Lok, Zhu, Lei, Sun, Shuai, Cohen, Ronald C, Min, Kyung-Eun, Cho, Changmin, Philip, Sajeev, Liu, Xiong, Chance, Kelly

“…The availability of formaldehyde (HCHO) (a proxy for volatile organic compound reactivity) and nitrogen dioxide (NO.sub.2) (a proxy for nitrogen oxides)…”
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Characterization of errors in satellite-based HCHO ∕ NO 2 tropospheric column ratios with respect to chemistry, column-to-PBL translation, spatial representation, and retrieval uncertainties by Souri, Amir H., Johnson, Matthew S., Wolfe, Glenn M., Crawford, James H., Fried, Alan, Wisthaler, Armin, Brune, William H., Blake, Donald R., Weinheimer, Andrew J., Verhoelst, Tijl, Compernolle, Steven, Pinardi, Gaia, Vigouroux, Corinne, Langerock, Bavo, Choi, Sungyeon, Lamsal, Lok, Zhu, Lei, Sun, Shuai, Cohen, Ronald C., Min, Kyung-Eun, Cho, Changmin, Philip, Sajeev, Liu, Xiong, Chance, Kelly

“…The availability of formaldehyde (HCHO) (a proxy for volatile organic compound reactivity) and nitrogen dioxide (NO2) (a proxy for nitrogen oxides)…”
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Nitrogen Oxides in the Global Upper Troposphere: Interpreting Cloud-Sliced NO2 Observations from the OMI Satellite Instrument by Marais, Eloise A., Jacob, Daniel J., Choi, Sungyeon, Joiner, Joanna, Belmonte-Rivas, Maria, Cohen, Ronald C., Beirle, Steffen, Murray, Lee T., Schiferl, Luke D., Shah, Viral, Jaegle, Lyatt

“…Nitrogen oxides (NOx≡NO+NO2) in the upper troposphere (UT) have a large impact on global tropospheric ozone and OH (the main atmospheric oxidant). New…”
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Characterization of Errors in Satellite-Based HCHO/NO2 Tropospheric Column Ratios With Respect to Chemistry, Column-to-PBL Translation, Spatial Representation, and Retrieval Uncertainties by Souri, Amir H., Johnson, Matthew S., Wolfe, Glenn M., Crawford, James H., Fried, Alan, Wisthaler, Armin, Brune, William H., Blake, Donald R., Weinheimer, Andrew J., Verhoelst, Tijl, Compernolle, Steven, Pinardi, Gaia, Vigouroux, Corrine, Langerock, Bavo, Choi, Sungyeon, Lamsal, Lok, Zhu, Lei, Sun, Shuai, Cohen, Ronald C., Min, Kyung-Eun, Cho, Changmin, Philip, Sajeev, Liu, Xiong, Chance, Kelly

“…The availability of formaldehyde (HCHO) (a proxy for volatile organic compound reactivity) and nitrogen dioxide (NO2) (a proxy for nitrogen oxides)…”
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Assessment of NO2 Observations During DISCOVER-AQ and KORUS-AQ Field Campaigns by Choi, Sungyeon, Lamsal, Lok N, Folette-Cook, Melanie, Joiner, Joanna, Krotkov, Nickolay A, Swartz, William H, Pickering, Kenneth E, Loughner, Christopher P, Appel, Wyat, Pfister, Gabriele, Saide, Pablo E, Cohen, Ronald C., Weinheimer, Andrew J., Herman, Jay R

“…NASA’s Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ, conducted in…”
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Nitrogen oxides in the global upper troposphere: interpreting cloud-sliced NO 2 observations from the OMI satellite instrument by Marais, Eloise A., Jacob, Daniel J., Choi, Sungyeon, Joiner, Joanna, Belmonte-Rivas, Maria, Cohen, Ronald C., Beirle, Steffen, Murray, Lee T., Schiferl, Luke D., Shah, Viral, Jaeglé, Lyatt

“…Nitrogen oxides (NOx≡NO+NO2) in the upper troposphere (UT) have a large impact on global tropospheric ozone and OH (the main atmospheric oxidant). New…”
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Nitrogen oxides in the global upper troposphere: interpreting cloud-sliced NO.sub.2 observations from the OMI satellite instrument by Marais, Eloise A, Jacob, Daniel J, Choi, Sungyeon, Joiner, Joanna, Belmonte-Rivas, Maria, Cohen, Ronald C, Beirle, Steffen, Murray, Lee T, Schiferl, Luke D, Shah, Viral, Jaeglé, Lyatt

“…Nitrogen oxides (NOx≡NO+NO2) in the upper troposphere (UT) have a large impact on global tropospheric ozone and OH (the main atmospheric oxidant). New…”
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New Observations of NO2 in the Upper Troposphere from TROPOMI by Marais, Eloise A, Roberts, John F, Ryan, Robert G, Eskes, Henk, Boersma, K Folkert, Choi, Sungyeon, Joiner, Joanna, Abuhassan, Nader, Redondas, Alberto, Grutter, Michel, Cede, Alexander, Gomez, Laura, Navarro-Comas, Monica

“…Nitrogen oxides (NOx≡NO+NO2) in the NOx-limited upper troposphere (UT) are long-lived and so have a large influence on the oxidizing capacity of the…”
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Using satellite observations of tropospheric NO.sub.2 columns to infer long-term trends in US NO.sub.x emissions: the importance of accounting for the free tropospheric NO.sub.2 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 NO.sub.x emissions over the 2005-2017…”
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Using satellite observations of tropospheric NO 2 columns to infer long-term trends in US NO x emissions: the importance of accounting for the free tropospheric NO 2 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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A new global anthropogenic SO 2 emission inventory for the last decade: a mosaic of satellite-derived and bottom-up emissions by Liu, Fei, Choi, Sungyeon, Li, Can, Fioletov, Vitali E., McLinden, Chris A., Joiner, Joanna, Krotkov, Nickolay A., Bian, Huisheng, Janssens-Maenhout, Greet, Darmenov, Anton S., da Silva, Arlindo M.

“…Sulfur dioxide (SO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor have been used to detect emissions from large point sources…”
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