土壤干旱遥感监测的最新研究进展

近年来土壤干旱的研究已经基于有限站点实测数据扩展到了大尺度多源遥感监测。本文在介绍了陆面过程参数的最新研究进展基础上，概括了土壤水分的多时空动态研究进展，详细介绍了多种土壤干旱指标的计算方法和应用情况，评述了土壤干旱遥感监测方面的国内外进展，对今后土壤干旱的重要研究方向进行了展望。不同土壤干旱监测指标的适用性与地面水文、土壤、大气和植被情况高度关联，土壤干旱指标的选择需严谨且适宜地区情况。今后不同深度、不同区域、不同时间尺度和空间尺度下的土壤干旱遥感监测研究还需更细致的工作。

Latest Advances of Soil Drought and Its Monitoring Based on Remote Sensing

On the basis of introducing the latest research progress of land surface process parameters,this paper summarizes the research progress of multi-temporal dynamics of soil moisture,introduces the detail calculation methods and applications of various soil drought indexes,and summarizes the progress of soil drought remote sensing monitoring all over the world.The research direction of soil drought in the future is discussed based on the above contents.In recent years,the study of soil drought has been extended from limited site measured data to large-scale multi-source remote sensing monitoring.Because the applicability of different soil drought monitoring indicators is closely related to land surface parameters and vegetation coverage,the application in different climatic regions will vary according to vegetation conditions and soil temperature.In the future,more detailed research is needed about the soil remote sensing monitoring at different soil depths,regions and spatiotemporal scales.