A study on microwave drought indices in Hebei Province of China using AMSR-E observations

Youfei Zheng; Fulai Guan; Fang Xu; Xiwu Zhan; Binyun Yang; Rongjun Wu

doi:10.1117/12.795190

10 September 2008 A study on microwave drought indices in Hebei Province of China using AMSR-E observations

Youfei Zheng, Fulai Guan, Fang Xu, Xiwu Zhan, Binyun Yang, Rongjun Wu

Proceedings Volume 7085, Atmospheric and Environmental Remote Sensing Data Processing and Utilization IV: Readiness for GEOSS II; 70850J (2008) https://doi.org/10.1117/12.795190
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

Based on the brightness temperature observations of AMSR-E in 2005 and 2006, this study attempts to find the simplest and best drought index for identifying drought areas. Totally 8 candidate drought indices were tested from the AMSR-E brightness temperature data. Assuming that the NASA AMSR-E soil moisture data obtained from complicated soil moisture retrieval algorithms are the best currently available soil drought indicator, the computed index with the best correlation with these soil moisture data should the best drought index. For each of the selected three stations in Hebei province, the temporal correlations between this drought index and the corresponding precipitation anomalies were computed for the two years. The spatial variations of this drought index and the precipitation anomaly were also compared with each other for Hebei province in March 2006. Based on these comparisons, the selected drought index was found to be useful for monitoring drought. Problems for using satellite microwave observations and future research needs on microwave drought monitoring are discussed.

Citation Download Citation

Youfei Zheng, Fulai Guan, Fang Xu, Xiwu Zhan, Binyun Yang, and Rongjun Wu "A study on microwave drought indices in Hebei Province of China using AMSR-E observations", Proc. SPIE 7085, Atmospheric and Environmental Remote Sensing Data Processing and Utilization IV: Readiness for GEOSS II, 70850J (10 September 2008); https://doi.org/10.1117/12.795190

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