环境科学
归一化差异植被指数
中分辨率成像光谱仪
干燥
含水量
土地覆盖
光谱辐射计
植被(病理学)
水分
遥感
土壤科学
土地利用
地质学
气象学
气候变化
地理
反射率
卫星
工程类
外科
病理
航空航天工程
土木工程
物理
光学
岩土工程
海洋学
医学
作者
Yang Han,Yeqiao Wang,Yunsheng Zhao
标识
DOI:10.1109/tgrs.2010.2040830
摘要
Soil moisture is an important indicator of the land surface environment. The combination of land surface temperature (LST) and normalized difference vegetation index (NDVI) could enhance the ability of extracting information on soil moisture conditions. In this study, we employed multitemporal Moderate Resolution Imaging Spectroradiometer (MODIS) data products of LST, NDVI, and land cover types to obtain the information about soil moisture for the greater Changbai Mountains. We selected nine time periods in 2007 for inversion of the soil moisture conditions and focused the analysis on four critical time periods. According to the spatial pattern of the LST and NDVI, we established the wet-edge and dry-edge equations and determined the relative parameters. We obtained the temperaturevegetation dryness index (TVDI) using the wet-edge and dry-edge relationships to reveal temporal changes of the land surface soil moisture conditions of the study area. We also analyzed the relationship between different land cover types in five TVDI classes. This paper demonstrates that TVDI is an effective indicator to detect soil moisture status in the greater Changbai Mountains region. © 2006 IEEE.
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