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地理科学  2014 

多时间尺度温度-植被指数特征空间旱情监测的差异性

, PP. 987-993

Keywords: 温度-植被指数,多时间尺度,旱情监测,差异性

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Abstract:

采用2011年5月28日MODIS多时间尺度数据产品和土壤相对含水量RSM数据,对河北省多时间尺度Ts-EVI特征空间旱情遥感监测的差异性进行了研究,结果表明①多时间尺度Ts-EVI特征空间的TVDI与土壤表层RSM具有较高的相关性,1d尺度Ts和1d、8d尺度EVI构建的RSM-TVDI决定系数较高,8d尺度的Ts和8d、16d尺度EVI的RSM-TVDI决定系数较低。②多时间尺度Ts-EVI特征空间的旱情监测结果在空间分布上具有较好的一致性,但其面积存在一定的差异;旱情监测应用中Ts-EVI特征空间构建应首选1d时间尺度的Ts和EVI,其次是1d尺度的Ts和8d尺度的EVI,再次为8d尺度的Ts和8d尺度的EVI。

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