海洋气象学报2024，Vol.44Issue(4)：54-63,10.DOI:10.19513/j.cnki.hyqxxb.20240514002
中法海洋卫星微波散射计青藏高原土壤水分反演研究
Study on CSCAT soil moisture retrieval in the Qinghai-Tibet Plateau
摘要
Abstract
The China-France Oceanography SATellite(CFOSAT)carries the first international fan-beam rotary scanning microwave CFOSAT SCATterometer(CSCAT),whose rich observation geometry information provides new opportunities for remote sensing monitoring of soil moisture on the Qinghai-Tibet Plateau.This study proposes an effective method for detecting the changes in soil moisture applicable to the CSCAT,without the need for modeling complex mechanism and constructing look-up table.The soil moisture retrieval algorithm can be constructed by utilizing the changes in the backscattering coefficient difference and the vegetation empirical function.Through comparing the retrieval results of the detection algorithm and the ground measured results,it is found that the CFOSAT retrieval results are in good agreement with the measured results,and it shows that this algorithm has high accuracy and can accurately reflect the changes in soil moisture.Meanwhile,the analysis of the spatial and temporal distribution characteristics of the soil moisture in the Qinghai-Tibet Plateau reveals that the soil is dry in the northern-central part of the plateau and wet in the western and southeastern parts with complex spatial characteristics in localized areas,and the soil moisture is characterized with significant seasonal variations.关键词
中法海洋卫星(CFOSAT)/青藏高原/后向散射系数/变化检测/土壤水分Key words
China-France Oceanography SATellite(CFOSAT)/the Qinghai-Tibet Plateau/backscattering coefficient/detection of change/soil moisture分类
信息技术与安全科学引用本文复制引用
段潘,赵天杰,郎姝燕,姚盼盼,吕海深,彭志晴,白瑜,郑景耀,曾业隆..中法海洋卫星微波散射计青藏高原土壤水分反演研究[J].海洋气象学报,2024,44(4):54-63,10.基金项目
国家自然科学基金项目(42201393,42090014) （42201393,42090014）
