A027-07
The Role of OMI in a Global Observing System for Air Quality and Atmospheric Composition

Monday, 7 December 2020: 21:08
Virtual
David P Haffner1,2, Quintus Kleipool3, Nico Rozemeijer3, Joanna Joiner2, Glen R Jaross4, Mirna van Hoek3, Antje Ludewig3, Nickolay Anatoly Krotkov4, Omar Torres4, Jonatan Leloux3, Mark ter Linden3, Emiel van der Plas3, Erwin Loots3, Sergey V Marchenko5, Lok N Lamsal6, Can Li2,7, Zachary Fasnacht1, Ramaswamy Tiruchirapalli1, Alexander P Vasilkov1, Nick Gorkavyi1, Natalya A Kramarova4, Jerald R Ziemke8, Hiren T Jethva4,9, Changwoo Ahn5, Wenhan Qin5, Bradford L Fisher10, Eun-Su Yang5, Sungyeon Choi10, Yasuko Yoshida10, Fei Liu4,11, Joris P Veefkind12,13, Pieternel Levelt13,14, Johanna Tamminen15 and Seppo Hassinen16, (1)Science Systems and Applications, Inc., Lanham, MD, United States, (2)NASA GSFC, Greenbelt, MD, United States, (3)Royal Netherlands Meteorological Institute, De Bilt, Netherlands, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (5)SSAI, Lanham, MD, United States, (6)NASA Goddard Space Flight Ctr., Greenbelt, MD, United States, (7)Earth System Science Interdisciplinary Center, College PARK, MD, United States, (8)NASA Goddard SFC, Greenbelt, MD, United States, (9)Universities Space Research Association, Columbia, MD, United States, (10)SSAI, Greenbelt, MD, United States, (11)Universities Space Research Association Greenbelt, Greenbelt, MD, United States, (12)Royal Netherlands Meteorological Institute, De Bilt, 3730, Netherlands, (13)Delft University of Technology, Delft, Netherlands, (14)Royal Netherlands Meteorological Instiute, De Bilt, Netherlands, (15)Finnish Meteorological Inst., Helsinki, Finland, (16)Finnish Meteorological Institute, Helsinki, Finland
Recorded Presentation
Abstract:
Now operating for over 16 years on NASA's Earth Observing System (EOS) Aura spacecraft, the Dutch-Finnish Ozone Monitoring Instrument (OMI) continues to collect important global measurements of air quality and atmospheric composition. OMI has maintained excellent performance with low degrees of optical degradation, wavelength drift, and bandpass shift. While OMI's global coverage period has decreased from one to two days due to the row anomaly (affecting portions of the swath presumably due to material outside the instrument blocking and scattering light), the consistently high quality of OMI measurements has enabled the creation of long-term scientifically important datasets of nitrogen dioxide (NO2), sulfur dioxide (SO2), total column ozone (O3), aerosols (including aerosols above cloud), and solar spectral activity. OMI’s stable, well characterized datasets have been critically important in recent studies of changes in air pollution due to restricted human activity during COVID-19. Recent measurements of NO2 from OMI can be compared to previous years with significant precision; this is necessary to examine the anthropogenic and natural processes that regulate levels of tropospheric NO2. The reliability of OMI data is the result of long-term efforts to monitor the degradation of the instrument and maintain its calibration. Integrating OMI observations with the next generation of air quality instruments is critical to create a consistent long-term climate data record. New missions include the TROPOspheric Monitoring Instrument (TROPOMI) on the ESA Copernicus Sentinel-5 Precursor (S5P) satellite, the Korean Aerospace Research Institute (KARI) Geostationary Environment Monitoring Spectrometer (GEMS) on GEO-KOMPSAT-2B and, launching in a few years, the geostationary NASA Tropospheric Emissions: Monitoring of Pollution (TEMPO) mission and ESA Copernicus Sentinel-4 geostationary and Sentinel-5 polar orbiting missions. A significant effort is now underway to improve and update the OMI calibration, Level 1b processor algorithms and science products. We discuss the changes that users can expect in the new Collection 4 OMI data, proposed plans for future OMI operations, and potential strategies for integrating the OMI data record with the newer satellite missions.
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