[S-VC34] 火山の監視と活動評価

[SVC34-P10] Satellite observations on surface temperatures at Kueishantao (KST) island of Taiwan in 1999-2021

*Hai-Po Chan¹ (1.Department of Earth Sciences, National Central University, Taiwan)

キーワード：Kueishantao (KST), Satellite observation, Land surface temperature (LST), Landsat, MODIS, ASTER

This research will focus on the satellite observation derived multitemporal surface temperature surveys in 1999-2021 on Kueishantao (KST) island of Taiwan. KST island lies offshore northeastern Taiwan in the southern Okinawa Trough and opposite to the Ilan plain which is the southwestern end of the trough and is formed by back arc spreading with a series of active microseismicity and volcanism. It represents one of the two major volcanic centers in northern Taiwan (the other being the Tatun Volcano Group). Its last eruption occurred during the Holocene (~7 ka) and is considered as an active volcano. We aim to better understand how magmatic processes may interact with the KST land surface temperature (LST). The thermal infrared imagery datasets of MODIS (1 km spatial resolution), ASTER (90 m) and Landsat (30 m) are used in this study. Specifically, the U.S. NASA Earth observing satellites (Landsat ETM+, Aqua/Terra MODIS) derived land surface temperature time series are used to delineate the past and current thermal activity pattern and future trend of KST. Furthermore, the Terra ASTER land surface temperature products (from 2000-03-19 to present) are used for the cross validation of the MODIS LST time series. This study aims to utilize the advantages and effectiveness of satellite remote sensing on volcano studies and proposes an interdisciplinary approach (i.e., integration of geology, geophysics, geochemistry, and remote sensing) to the prediction and assessment of volcanoes in the future.
Keywords: Kueishantao (KST); Satellite observation; Land surface temperature (LST); Landsat; MODIS; ASTER