Validation of Land Surface Temperature Derived from 37-GHz AMSR-E over Northern China
Validation of Land Surface Temperature Derived from 37-GHz AMSR-E over Northern China
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DOI：
10.1080/16742834.2011.11446940
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发表时间：
2011-01
影响因子：
2.3
通讯作者：
An-Zhi Zhang;Gen-Suo Jia;He-Song Wang;Tian-Bao Zhao
中科院分区：
文献类型：
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作者：
An-Zhi Zhang;Gen-Suo Jia;He-Song Wang;Tian-Bao Zhao
摘要利用Ka波段（37 GHz）垂直极化亮度温度对中国北方地区地表温度进行了验证研究。利用荷兰阿姆斯特丹自由大学和美国宇航局戈达德太空飞行中心（VUA-NASA）的先进微波扫描辐射计-地球观测系统（AMSR-E）遥感地表温度数据，与中国北方干旱半干旱区11 / 3个增强协调观测站的地表温度/红外日观测数据进行了对比。下降路径的VUA-NASA地表温度与原位红外地表温度的对应关系强于土壤温度，后者的相关系数（R2）在0.41 ~ 0.86之间。与此同时，高架桥上升地表温度总体高于现场土壤温度，相关系数（R2）在0.07 ~ 0.72之间。同一站点下降路径的相关性普遍大于上升路径。VUA-NASA地表温度下降路径对降水较为敏感，且与地温动态具有较好的一致性。分析结果表明，高架桥地表温度下降能较好地反映该地区地表温度的变化规律。
Abstract A validation study of land surface temperature (LST) obtained from the Ka band (37 GHz) vertically polarized brightness temperature over northern China is presented. The remotely sensed LST derived jointly by the Vrije Universiteit Amsterdam and the NASA Goddard Space Flight Center (VUA-NASA) from the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) were compared to the daily in-situ top soil temperature/infrared surface temperature observations from eleven/three Enhanced Coordinated Observation stations in arid and semi-arid regions of northern China. The VUA-NASA LST from the descending path exhibited a stronger correspondence to the in-situ infrared surface temperature than soil temperature observations, whereas correlations (R2) of the latter ranged from 0.41 to 0.86. Meanwhile, the ascending overpass LST was generally warmer than the in-situ soil temperature observations at all stations, and the correlation (R2) was between 0.07 and 0.72. Furthermore, the correlation of the descending path was generally greater than that of the ascending path at the same station. The descending path VUA-NASA LST was sensitive to precipitation and presented good agreement with ground temperature dynamics. The analyses demonstrated that the descending overpass LST was reliable to reflect reasonable patterns of temperature dynamics for land surface temperature in the region.