edu.ucar.opensky::articles:23319 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:18:39.638735 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7sj1pt6 New era of air quality monitoring from space: Geostationary Environment Monitoring Spectrometer (GEMS) 2020-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7sj1pt6 https://doi.org/10.1175/BAMS-D-18-0013.1 Kim, J. author Jeong, U. author Ahn, M. author Kim, J. H. author Park, R. J. author Lee, H. author Song, C. H. author Choi, Y. author Lee, K. author Yoo, J. author Jeong, M. author Park, S. K. author Lee, K. author Song, C. author Kim, S. author Kim, Y. J. author Kim, S. author Kim, M. author Go, S. author Liu, X. author Chance, K. author Chan Miller, C. author Al-Saadi, J. author Veihelmann, B. author Bhartia, P. K. author Torres, O. author Abad, G. G. author Haffner, D. P. author Ko, D. H. author Lee, S. H. author Woo, J. author Chong, H. author Park, S. S. author Nicks, D. author Choi, W. J. author Moon, K. author Cho, A. author Yoon, J. author Kim, S. author Hong, H. author Lee, K. author Lee, H. author Lee, S. author Choi, M. author Veefkind, P. author Levelt, P. F. author Edwards, David P. author Kang, M. author Eo, M. author Bak, J. author Baek, K. author Kwon, H. author Yang, J. author Park, J. author Han, K. M. author Kim, B. author Shin, H. author Choi, H. author Lee, E. author Chong, J. author Cha, Y. author Koo, J. author Irie, H. author Hayashida, S. author Kasai, Y. author Kanaya, Y. author Liu, C. author Lin, J. author Crawford, J. H. author Carmichael, G. R. author Newchurch, M. J. author Lefer, B. L. author Herman, J. R. author Swap, R. J. author Lau, A. K. H. author Kurosu, T. P. author Jaross, G. author Ahlers, B. author Dobber, M. author McElroy, C. T. author Choi, Y. author UCAR/NCAR - Library publisher The Geostationary Environment Monitoring Spectrometer (GEMS) is scheduled for launch in February 2020 to monitor air quality (AQ) at an unprecedented spatial and temporal resolution from a geostationary Earth orbit (GEO) for the first time. With the development of UV-visible spectrometers at sub-nm spectral resolution and sophisticated retrieval algorithms, estimates of the column amounts of atmospheric pollutants (O-3, NO2, SO2, HCHO, CHOCHO, and aerosols) can be obtained. To date, all the UV-visible satellite missions monitoring air quality have been in low Earth orbit (LEO), allowing one to two observations per day. With UV-visible instruments on GEO platforms, the diurnal variations of these pollutants can now be determined. Details of the GEMS mission are presented, including instrumentation, scientific algorithms, predicted performance, and applications for air quality forecasts through data assimilation. GEMS will be on board the Geostationary Korea Multi-Purpose Satellite 2 (GEO-KOMPSAT-2) satellite series, which also hosts the Advanced Meteorological Imager (AMI) and Geostationary Ocean Color Imager 2 (GOCI-2). These three instruments will provide synergistic science products to better understand air quality, meteorology, the long-range transport of air pollutants, emission source distributions, and chemical processes. Faster sampling rates at higher spatial resolution will increase the probability of finding cloud-free pixels, leading to more observations of aerosols and trace gases than is possible from LEO. GEMS will be joined by NASA's Tropospheric Emissions: Monitoring of Pollution (TEMPO) and ESA's Sentinel-4 to form a GEO AQ satellite constellation in early 2020s, coordinated by the Committee on Earth Observation Satellites (CEOS). 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 2020 American Meteorological Society. None eng geoscientificInformation