[A-CG44] 静止軌道衛星による陸面観測

[ACG44-08] Reduction of Snow Contamination in Himawari-8/-9 AHI NDVI for Improved Phenology Monitoring

*Tomoaki Miura¹、Yuhei Yamamoto²、Shin Nagai³、Kazuhito Ichii²、Narumasa Tsutsumida⁴ (1.University of Hawaiʻi at Mānoa、2.Center for Environmental Remote Sensing, Chiba University、3.JAMSTEC、4.Saitama University)

キーワード：AHI, Snow, NDVI, NDSI

We examined the normalized difference snow index (NDSI) and land surface temperature (LST) for detecting the snow cover contaminations in AHI NDVI temporal profiles in the Northern Japan. A large number of AHI NDVI, NDSI, and LST temporal profiles were inspected to find the timing when the low NDVI period due to snow cover started. The LST value of 10 degC and the NDSI value below zero appeared the most appropriate values for the start of the low NDVI period. We felt that using both the NDSI and LST would be necessary to confidently detect the low NDVI period due to surface snow cover.