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Dr. Sungyeon Choi

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Dr. Sungyeon Choi

  • RESEARCH SCIENTIST
  • 301.286.5106
  • NASA/GSFC
  • Mail Code: 614
  • Greenbelt , MD 20771
  • Employer: SCIENCE SYSTEMS AND APPLICATIONS INC

    • Brief Bio

    Dr. Choi is a atmospheric scientist and an expert in the remote sensing of tropospheric trace gases. She is highly experienced in retrieving tropospheric columns and free tropospheric abundances of trace gases from extensive use of space-based measurements and models. Dr. Choi is working for estimating the free tropospheric budgets and providing model constraints of NO2 and BrO to investigate their impacts of tropospheric ozone chemistry and radiative forcing.

    Research Interests

    Satellite observations of tropospheric composition; Cloud slicing; Air quality; Polar halogen chemistry

    • Validate tropospheric column NO2 and BrO using aircraft measurements
    • Develop the application of cloud slicing to estimate free tropospheric NO2 and BrO abundances
    • Construct seasonal preliminary climatologies of free tropospheric NO2 and BrO
    • Derive tropospheric columns of BrO using OMI- and GOME-2-observed total columns and models
    • Investigate connection of Arctic tropospheric BrO explosion to climate and meteorological conditions
    • Simulate wind-driven blowing-snow sea salt aerosols in GEOS-5

    Positions/Employment

    2012 - Present

    Research Scientist

    Science Systems and Applications, Inc., Lanham, MD

    Education

    2012 Ph.D. Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
    Dissertation: “Investigation of tropospheric BrO using space-based total column BrO measurements”
    2010 M.S. Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
    2005 B.S. Chemistry, Seoul National University, Seoul, South Korea

    Publications

    Refereed

    Marais, E. A., J. F. Roberts, R. G. Ryan, et al. H. Eskes, K. F. Boersma, S. Choi, J. Joiner, N. Abuhassan, A. Redondas, M. Grutter, A. Cede, L. Gomez, and M. Navarro-Comas. 2021. "New observations of NO2 in the upper troposphere from TROPOMI." Atmospheric Measurement Techniques, 14 (3): 2389-2408 [10.5194/amt-14-2389-2021]

    Lamsal, L. N., N. A. Krotkov, A. Vasilkov, et al. S. V. Martchenko, W. Qin, E.-S. Yang, Z. Fasnacht, J. Joiner, S. Choi, D. Haffner, W. H. Swartz, B. Fisher, and E. Bucsela. 2021. "Ozone Monitoring Instrument (OMI) Aura nitrogen dioxide standard product version 4.0 with improved surface and cloud treatments." Atmospheric Measurement Techniques, 14: 455-479 [10.5194/amt-14-455-2021]

    Wales, P. A., R. J. Salawitch, E. S. Lind, et al. G. H. Mount, T. P. Canty, K. Chance, S. Choi, D. Donohoue, T. P. Kurosu, W. R. Simpson, and R. M. Suleiman. 2020. "Evaluation of the Stratospheric and Tropospheric Bromine Burden over Fairbanks, Alaska Based on Column Retrievals of Bromine Monoxide." Journal of Geophysical Research: Atmospheres, 126 (2): e2020JD032896 [10.1029/2020jd032896]

    Liu, F., A. Page, S. A. Strode, et al. Y. Yoshida, S. Choi, B. Zheng, L. N. Lamsal, C. Li, N. A. Krotkov, H. Eskes, R. van der A, P. Veefkind, P. F. Levelt, O. P. Hauser, and J. Joiner. 2020. "Abrupt decline in tropospheric nitrogen dioxide over China after the outbreak of COVID-19." Science Advances, 6 (28): eabc2992 [10.1126/sciadv.abc2992]

    Choi, S., L. N. Lamsal, M. Follette-Cook, et al. J. Joiner, N. A. Krotkov, W. H. Swartz, K. E. Pickering, C. P. Loughner, W. Appel, G. Pfister, P. E. Saide, R. C. Cohen, A. J. Weinheimer, and J. R. Herman. 2020. "Assessment of NO2; observations during DISCOVER-AQ and KORUS-AQ field campaigns." Atmospheric Measurement Techniques, 13 (5): 2523-2546 [10.5194/amt-13-2523-2020]

    Silvern, R. F., D. J. Jacob, L. J. Mickley, et al. M. P. Sulprizio, K. R. Travis, E. A. Marais, R. C. Cohen, J. L. Laughner, S. Choi, J. Joiner, and L. N. Lamsal. 2019. "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." Atmospheric Chemistry and Physics, 19 (13): 8863-8878 [10.5194/acp-19-8863-2019]

    Marais, E. A., D. J. Jacob, S. Choi, et al. J. Joiner, M. Belmonte-Rivas, R. C. Cohen, S. Beirle, L. T. Murray, L. D. Schiferl, V. Shah, and L. Jaeglé. 2018. "Nitrogen oxides in the global upper troposphere: interpreting cloud-sliced NO2 observations from the OMI satellite instrument." Atmospheric Chemistry and Physics, 18 (23): 17017-17027 [10.5194/acp-18-17017-2018]

    Liu, F., S. Choi, C. Li, et al. V. E. Fioletov, C. A. McLinden, J. Joiner, N. A. Krotkov, H. Bian, G. Janssens-Maenhout, A. S. Darmenov, and A. M. da Silva. 2018. "A new global anthropogenic SO2 emission inventory for the last decade: a mosaic of satellite-derived and bottom-up emissions." Atmospheric Chemistry and Physics, 18 (22): 16571-16586 [10.5194/acp-18-16571-2018]

    Choi, S., N. Theys, R. J. Salawitch, et al. P. A. Wales, J. Joiner, T. P. Canty, K. Chance, R. M. Suleiman, S. P. Palm, R. I. Cullather, A. S. Darmenov, A. da Silva, T. P. Kurosu, F. Hendrick, and M. Van Roozendael. 2018. "Link Between Arctic Tropospheric BrO Explosion Observed From Space and Sea-Salt Aerosols From Blowing Snow Investigated Using Ozone Monitoring Instrument BrO Data and GEOS-5 Data Assimilation System." Journal of Geophysical Research: Atmospheres, 123: [10.1029/2017jd026889]

    Choi, S., J. Joiner, Y. Choi, et al. B. N. Duncan, A. Vasilkov, N. Krotkov, and E. Bucsela. 2014. "First estimates of global free-tropospheric NO2 abundances derived using a cloud-slicing technique applied to satellite observations from the Aura Ozone Monitoring Instrument (OMI)." Atmos. Chem. Phys., 14 (19): 10565-10588 [10.5194/acp-14-10565-2014]

    Liao, J., L. G. Huey, E. Scheuer, et al. J. E. Dibb, R. E. Stickel, D. J. Tanner, J. A. Neuman, J. B. Nowak, S. Choi, Y. Wang, R. J. Salawitch, T. Canty, K. Chance, T. Kurosu, R. Suleiman, A. J. Weinheimer, R. E. Shetter, A. Fried, W. Brune, B. Anderson, X. Zhang, G. Chen, J. Crawford, A. Hecobian, and E. D. Ingall. 2012. "Characterization of soluble bromide measurements and a case study of BrO observations during ARCTAS." Atmospheric Chemistry and Physics, 12 (3): 1327-1338 [10.5194/acp-12-1327-2012]

    Choi, S., Y. Wang, R. J. Salawitch, et al. T. Canty, J. Joiner, T. Zeng, T. P. Kurosu, K. Chance, A. Richter, L. G. Huey, J. Liao, J. A. Neuman, J. B. Nowak, J. E. Dibb, A. J. Weinheimer, G. Diskin, T. B. Ryerson, A. da Silva, J. Curry, D. Kinnison, S. Tilmes, and P. F. Levelt. 2012. "Analysis of satellite-derived Arctic tropospheric BrO columns in conjunction with aircraft measurements during ARCTAS and ARCPAC." Atmos. Chem. Phys., 12 (3): 1255-1285 [10.5194/acp-12-1255-2012]

    Brief Bio

    Dr. Choi is a atmospheric scientist and an expert in the remote sensing of tropospheric trace gases. She is highly experienced in retrieving tropospheric columns and free tropospheric abundances of trace gases from extensive use of space-based measurements and models. Dr. Choi is working for estimating the free tropospheric budgets and providing model constraints of NO2 and BrO to investigate their impacts of tropospheric ozone chemistry and radiative forcing.

    Publications

    Refereed

    Marais, E. A., J. F. Roberts, R. G. Ryan, et al. H. Eskes, K. F. Boersma, S. Choi, J. Joiner, N. Abuhassan, A. Redondas, M. Grutter, A. Cede, L. Gomez, and M. Navarro-Comas. 2021. "New observations of NO2 in the upper troposphere from TROPOMI." Atmospheric Measurement Techniques 14 (3): 2389-2408 [10.5194/amt-14-2389-2021]

    Lamsal, L. N., N. A. Krotkov, A. Vasilkov, et al. S. V. Martchenko, W. Qin, E.-S. Yang, Z. Fasnacht, J. Joiner, S. Choi, D. Haffner, W. H. Swartz, B. Fisher, and E. Bucsela. 2021. "Ozone Monitoring Instrument (OMI) Aura nitrogen dioxide standard product version 4.0 with improved surface and cloud treatments." Atmospheric Measurement Techniques 14 455-479 [10.5194/amt-14-455-2021]

    Wales, P. A., R. J. Salawitch, E. S. Lind, et al. G. H. Mount, T. P. Canty, K. Chance, S. Choi, D. Donohoue, T. P. Kurosu, W. R. Simpson, and R. M. Suleiman. 2020. "Evaluation of the Stratospheric and Tropospheric Bromine Burden over Fairbanks, Alaska Based on Column Retrievals of Bromine Monoxide." Journal of Geophysical Research: Atmospheres 126 (2): e2020JD032896 [10.1029/2020jd032896]

    Liu, F., A. Page, S. A. Strode, et al. Y. Yoshida, S. Choi, B. Zheng, L. N. Lamsal, C. Li, N. A. Krotkov, H. Eskes, R. van der A, P. Veefkind, P. F. Levelt, O. P. Hauser, and J. Joiner. 2020. "Abrupt decline in tropospheric nitrogen dioxide over China after the outbreak of COVID-19." Science Advances 6 (28): eabc2992 [10.1126/sciadv.abc2992]

    Choi, S., L. N. Lamsal, M. Follette-Cook, et al. J. Joiner, N. A. Krotkov, W. H. Swartz, K. E. Pickering, C. P. Loughner, W. Appel, G. Pfister, P. E. Saide, R. C. Cohen, A. J. Weinheimer, and J. R. Herman. 2020. "Assessment of NO2; observations during DISCOVER-AQ and KORUS-AQ field campaigns." Atmospheric Measurement Techniques 13 (5): 2523-2546 [10.5194/amt-13-2523-2020]

    Silvern, R. F., D. J. Jacob, L. J. Mickley, et al. M. P. Sulprizio, K. R. Travis, E. A. Marais, R. C. Cohen, J. L. Laughner, S. Choi, J. Joiner, and L. N. Lamsal. 2019. "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." Atmospheric Chemistry and Physics 19 (13): 8863-8878 [10.5194/acp-19-8863-2019]

    Marais, E. A., D. J. Jacob, S. Choi, et al. J. Joiner, M. Belmonte-Rivas, R. C. Cohen, S. Beirle, L. T. Murray, L. D. Schiferl, V. Shah, and L. Jaeglé. 2018. "Nitrogen oxides in the global upper troposphere: interpreting cloud-sliced NO2 observations from the OMI satellite instrument." Atmospheric Chemistry and Physics 18 (23): 17017-17027 [10.5194/acp-18-17017-2018]

    Liu, F., S. Choi, C. Li, et al. V. E. Fioletov, C. A. McLinden, J. Joiner, N. A. Krotkov, H. Bian, G. Janssens-Maenhout, A. S. Darmenov, and A. M. da Silva. 2018. "A new global anthropogenic SO2 emission inventory for the last decade: a mosaic of satellite-derived and bottom-up emissions." Atmospheric Chemistry and Physics 18 (22): 16571-16586 [10.5194/acp-18-16571-2018]

    Choi, S., N. Theys, R. J. Salawitch, et al. P. A. Wales, J. Joiner, T. P. Canty, K. Chance, R. M. Suleiman, S. P. Palm, R. I. Cullather, A. S. Darmenov, A. da Silva, T. P. Kurosu, F. Hendrick, and M. Van Roozendael. 2018. "Link Between Arctic Tropospheric BrO Explosion Observed From Space and Sea-Salt Aerosols From Blowing Snow Investigated Using Ozone Monitoring Instrument BrO Data and GEOS-5 Data Assimilation System." Journal of Geophysical Research: Atmospheres 123 [10.1029/2017jd026889]

    Choi, S., J. Joiner, Y. Choi, et al. B. N. Duncan, A. Vasilkov, N. Krotkov, and E. Bucsela. 2014. "First estimates of global free-tropospheric NO2 abundances derived using a cloud-slicing technique applied to satellite observations from the Aura Ozone Monitoring Instrument (OMI)." Atmos. Chem. Phys. 14 (19): 10565-10588 [10.5194/acp-14-10565-2014]

    Liao, J., L. G. Huey, E. Scheuer, et al. J. E. Dibb, R. E. Stickel, D. J. Tanner, J. A. Neuman, J. B. Nowak, S. Choi, Y. Wang, R. J. Salawitch, T. Canty, K. Chance, T. Kurosu, R. Suleiman, A. J. Weinheimer, R. E. Shetter, A. Fried, W. Brune, B. Anderson, X. Zhang, G. Chen, J. Crawford, A. Hecobian, and E. D. Ingall. 2012. "Characterization of soluble bromide measurements and a case study of BrO observations during ARCTAS." Atmospheric Chemistry and Physics 12 (3): 1327-1338 [10.5194/acp-12-1327-2012]

    Choi, S., Y. Wang, R. J. Salawitch, et al. T. Canty, J. Joiner, T. Zeng, T. P. Kurosu, K. Chance, A. Richter, L. G. Huey, J. Liao, J. A. Neuman, J. B. Nowak, J. E. Dibb, A. J. Weinheimer, G. Diskin, T. B. Ryerson, A. da Silva, J. Curry, D. Kinnison, S. Tilmes, and P. F. Levelt. 2012. "Analysis of satellite-derived Arctic tropospheric BrO columns in conjunction with aircraft measurements during ARCTAS and ARCPAC." Atmos. Chem. Phys. 12 (3): 1255-1285 [10.5194/acp-12-1255-2012]

                                                                                                                                                                                            
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    • Last Updated: 02/02/2023