1,2,4,3,5,1,19,- 1Yonsei University, Korea, South
- 2National Institute of Environmental Research, Korea, South
- 3Ewha Womans University, Korea, South
- 4Seoul National University, Korea, South
- 5Pukyong National University, Korea, South
- 6Pusan National University, Korea, South
- 10Ulsan National Institute of Science and Technology, Korea, South
- 11Korea Aerospace Research Institute, Korea, South
- 19Peking University, China
- *A full list of authors appears at the end of the abstract
Satellite remote sensing has played a key role in understanding distribution and changes of atmospheric composition including aerosols, ozone, air pollutants, and greenhouse gases. These contributions have been achieved extensively with Low Earth Orbit (LEO) satellite instruments providing one to two observations per day, including but not limited to MODIS, VIIRS, OMI, TROPOMI, GAOFEN, and so on.
Geostationary Environment Monitoring Spectrometer (GEMS) was launched in February, 2020 as the first component of GEO-Ring for atmospheric composition observation from geostationary Earth orbit. GEMS observation is complemented by AMI and GOCI-2 on the same spacecraft for aerosols, and hyperspectral instruments such as Chinese GIIRS. NASA’s TEMPO was launched in 2023 over North America and ESA’s Sentinel 4 UVN was launched in 2025 over Europe, to establish the GEO ring of Air Quality observation. GEMS has provided hourly observation of key air quality components, including aerosol, ozone, and their precursors such as NO2, HCHO, SO2 etc. In this talk, achievements of GEMS observations to monitor atmospheric composition of aerosol and gases from GEMS are presented with algorithm updates and validation results. Achievements and related issues with GEMS observations are discussed for further improvements and harmonization of dataset for the GEO-RING.
Jhoon KIM1, Hye-Jung SHIN2, Myoung Hwan AHN3, Rokjin PARK4, Hanlim LEE5, Jae-Hwan Kim6, Yong-Sang CHOI3, Kyung Soo HAN5, Chang-Keun SONG10, Si-Wan KIM1, Dongwon LEE2, Won-Jin LEE2, Hyunkee HONG2, Yuha KIM2, Kyung-Jung MOON2, Dai Ho KO11, Seung-Hoon LEE11, Minseok Kim1, Yujin CHAI1, Hyeji CHA1, Sangseo PARK10, Heesung CHONG12, Sujung GO1, Mijin KIM13, Yeseul CHO14, Hana LEE15, Mina KANG3, Mijin EO3, Yeeun LEE3, Gitaek LEE4, Eunjo HA4, Yeonjin JUNG5, Jeonghyun PARK5, Junsung PARK5, Juseon Bak6, Kanghyun BAEK13, Gyuyeon KIM3, Suyoung SIM5, Xiong LIU12, Kelly CHANCE12, Barry LEFER16, Pepijn VEEFKIND17, Ben VEIHEMLANN18, GEMS Science Team 1Yonsei University, Korea, South, 2National Institute of Environmental Research, Korea, South, 3Ewha Womans University, Korea, South, 4Seoul National University, Korea, South, 5Pukyong National University, Korea, South, 6Pusan National University, Korea, South, 7Gwangju Institute of Science and Technology, Korea, South, 8Gangneung-Wonju National University, Korea, South, 9Kyungpook National University, Korea, South, 10Ulsan National Institute of Science and Technology, Korea, South, 11Korea Aerospace Research Institute, Daejon, South Korea, 12Center for Astrophysics | Harvard & Smithsonian, United States, 13NASA Goddard Space Flight Center, United States, 14Earth System Science Interdisciplinary Center (ESSIC), United States 15Korea Meteorological Institute, Korea, South, 16NASA Headquarters, United States, 17Royal Netherlands Meteorological Institute, Netherlands, 18European Space Research and Technology Centre, Netherlands
How to cite: Kim, J., Shin, H.-J., Ahn, M. H., Park, R., Lee, H., Kim, J.-H., Choi, Y.-S., Han, K. S., Song, C.-K., Kim, S.-W., Lee, D., Lee, W.-J., Hong, H., Kim, Y., Moon, K.-J., Ko, D. H., Lee, S.-H., Kim, M., Chai, Y., and Zeng, Z.-C. and the GEMS science Team: 5-year Operation of Geostationary Environmental Monitoring Spectrometer (GEMS) for Atmospheric Composition Observation in Asia in High Spatio-temporal Resolution, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-15783, https://doi.org/10.5194/egusphere-egu26-15783, 2026.
