[A-CG41] 衛星による地球環境観測

[ACG41-01] First total ozone column observations from the Ozone Monitoring Suite-Nadir (OMS-N) onboard China’s FengYun-3F satellite

*Jian Xu¹、Yapeng Wang²、Lin Chen²、Dmitry Efremenko³、Lanlan Rao¹、Qian Wang²、Yongmei Wang¹、Xiuqing Hu² (1.National Space Science Center, Chinese Academy of Sciences 、2.National Satellite Meteorological Center, China Meteorological Administration、3.Remote Sensing Technology Institute, German Aerospace Center (DLR))

キーワード：FengYun-3F, OMS-N, Ozone

The Ozone Monitoring Suite-Nadir (OMS-N), a state-of-the-art hyperspectral ultraviolet-visible (UV-VIS) sensor onboard China’s FengYun-3F (FY-3F) satellite, was launched in August 2023. Designed for a morning orbit, OMS-N represents a significant advancement in global atmospheric composition monitoring, offering an unprecedented spatial resolution of 7 km × 7 km. This study presents the first total ozone column (TOC) observations from OMS-N, employing an adapted Differential Optical Absorption Spectroscopy (DOAS) retrieval algorithm. Validation against ground-based measurements from Brewer, Dobson, and SAOZ instruments at 34 sites demonstrated strong agreement, with correlation coefficients exceeding 0.95. Comparisons with other well-established satellite instruments such as TROPOMI and GOME-2B, showed that OMS-N can consistently capture global seasonal ozone patterns, with biases typically within 2% across hemispheres and seasons. These results establish OMS-N as a reliable tool for high-resolution dynamic ozone monitoring, significantly enhancing our ability to address climate and environmental challenges.