edu.ucar.opensky::articles:22302 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:41:21.873312 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d700053j https://doi.org/10.3334/ORNLDAAC/1293 https Related Dataset #1 Global Fire Emissions Database, Version 4.1 (GFEDv4) Balance of emission and dynamical controls on ozone during the Korea-United States Air Quality Campaign from multiconstituent satellite data assimilation 2019-01-16T00:00:00Z publication https://n2t.org/ark:/85065/d700053j https://doi.org/10.1029/2018JD028912 Miyazaki, K. author Sekiya, T. author Fu, D. author Bowman, K. W. author Kulawik, S. S. author Sudo, K. author Walker, T. author Kanaya, Y. author Takigawa, M. author Ogochi, K. author Eskes, H. author Boersma, K. F. author Thompson, A. M. author Gaubert, Benjamin author Barre, J. author Emmons, Louisa K. author UCAR/NCAR - Library publisher Global multiconstituent concentration and emission fields obtained from the assimilation of the satellite retrievals of ozone, CO, NO2, HNO3, and SO2 from the Ozone Monitoring Instrument (OMI), Global Ozone Monitoring Experiment 2, Measurements of Pollution in the Troposphere, Microwave Limb Sounder, and Atmospheric Infrared Sounder (AIRS)/OMI are used to understand the processes controlling air pollution during the Korea-United States Air Quality (KORUS-AQ) campaign. Estimated emissions in South Korea were 0.42TgN for NOx and 1.1Tg CO for CO, which were 40% and 83% higher, respectively, than the a priori bottom-up inventories, and increased mean ozone concentration by up to 7.51.6ppbv. The observed boundary layer ozone exceeded 90ppbv over Seoul under stagnant phases, whereas it was approximately 60ppbv during dynamical conditions given equivalent emissions. Chemical reanalysis showed that mean ozone concentration was persistently higher over Seoul (75.107.6ppbv) than the broader KORUS-AQ domain (70.59.2ppbv) at 700hPa. Large bias reductions (>75%) in the free tropospheric OH show that multiple-species assimilation is critical for balanced tropospheric chemistry analysis and emissions. The assimilation performance was dependent on the particular phase. While the evaluation of data assimilation fields shows an improved agreement with aircraft measurements in ozone (to less than 5ppbv biases), CO, NO2, SO2, PAN, and OH profiles, lower tropospheric ozone analysis error was largest at stagnant conditions, whereas the model errors were mostly removed by data assimilation under dynamic weather conditions. Assimilation of new AIRS/OMI ozone profiles allowed for additional error reductions, especially under dynamic weather conditions. Our results show the important balance of dynamics and emissions both on pollution and the chemical assimilation system performance. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2019 American Geophysical Union. None eng geoscientificInformation