Monitoring Thermal Activity of the Beppu Geothermal Area in Japan Using Multisource Satellite Thermal Infrared Data
Monitoring Thermal Activity of the Beppu Geothermal Area in Japan Using Multisource Satellite Thermal Infrared Data
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DOI：
10.3390/geosciences8080306
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发表时间：
2018-08
期刊：
影响因子：
2.7
通讯作者：
M. Mia;Y. Fujimitsu;J. Nishijima
中科院分区：
文献类型：
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作者：
M. Mia;Y. Fujimitsu;J. Nishijima
别府地热区是日本九州岛东北部最大的温泉度假区之一，由火山中心下方的热液提供。Garan和Mt.在西方的Tsurumi。我们利用先进星载热发射与反射辐射计(ASTER)和陆地卫星8号热红外扫描仪(TIR)提供的夜间多源卫星热红外数据(TIR)监测了2009-2017年间别府地热区的热损失。我们还评估了山上的热量损失。加兰·福马罗尔调查了他们之间的关系。采用归一化植被指数(NDVI)光谱发射率阈值方法、地表温度(LST)分裂窗算法和辐射热通量(RHF)Stefan-Boltzmann方程估算热量损失。从2009年到2015年，别府地热区和芒特山的总热量损失总体上增加了约35%，然后在2017年下降了约33%-42%。总体而言，加兰·福马罗尔。较高的热异常出现在2015年，主要发生在别府地热区的东南沿海地区。热力异常以2011年最高，2017年最低。加兰烟雾剂。2015年，这两个研究地区都记录了RHF值范围较高的地区。结果表明，别府地热区和山热异常具有相似的热损失和热异常特征。Garan Fumaroles，表明整个地热系统紧密相连。这表明夜间TIR数据对于监测别府地热区的热状况是有效的。
The Beppu geothermal area, one of the largest spa resorts on the northeast Kyushu Island of Japan, is fed by hydrothermal fluids beneath the volcanic center of Mt. Garan and Mt. Tsurumi in the west. We explored the thermal status of the Beppu geothermal area using nighttime multisource satellite thermal infrared data (TIR) from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Landsat 8 thermal infrared scanner (TIRS) to monitor heat loss from 2009 to 2017. We also assessed heat loss from Mt. Garan fumaroles to investigate a relationship between them. The normalized differential vegetation index (NDVI) threshold method of spectral emissivity, the split-window algorithm for land surface temperature (LST), and the Stefan–Boltzmann equation for radiative heat flux (RHF) were used to estimate heat loss in this study. Total heat loss increased by about a 35% trend overall from 2009 to 2015 and then declined about 33–42% in 2017 in both the Beppu geothermal area and Mt. Garan fumaroles overall. The higher thermal anomalies were found in 2015 mostly in the southeastern coastal area of the Beppu geothermal region. The highest thermal anomaly was obtained in 2011 and the lowest in 2017 within the Mt. Garan fumaroles. The areas with a higher range of RHF values were recorded in 2015 in both study areas. Finally, the results show similar patterns of heat loss and thermal anomalies in both the Beppu geothermal area and Mt. Garan fumaroles, indicating a closely connected geothermal system overall. This suggests that nighttime TIR data are effective for monitoring the thermal status of the Beppu geothermal area.