气候变化领域集成服务门户(CCPortal): Estimation of snow water equivalent from passive microwave remote sensing data (SSM/I) in Tibetan Plateau

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DOI	10.1117/12.467411
	Estimation of snow water equivalent from passive microwave remote sensing data (SSM/I) in Tibetan Plateau
	Che, T; Li, X; Armstrong, RL
发表日期	2003
ISSN	0277-786X
EISSN	1996-756X
起始页码	405
结束页码	412
卷号	4894
英文摘要	So far, there is not an operational algorithm to estimate the snow water equivalent from passive microwave remote sensing data (SSM/I) in the Tibetan Plateau. In this study the SSM/I brightness temperature data in January 1993 are used to estimate SWE at this region. The frequencies of SSM/I data are used to retrieval snow depth are 19 and 37GHz in horizontal polarization. The results have shown all existing algorithms overestimated the snow depth in the Tibetan plateau. This paper analyzed the reasons of overestimation of snow depth from several aspects, such as the water content of snowpack, large water bodies (e.g. lakes), and the abnormal field snow depth data. After eliminating some futile data (including the passive microwave brightness temperature values and snow depth data in the weather stations), an improved algorithm has been established to retrieval the snow depth from the difference of 19 and 37GHz brightness temperature in horizontal polarization. Here, snow density is obtained by a time function of fresh snow density. The snow depth and density were converted to the snow water equivalent, and are regarded as the ground truth. In finally, the TB vertically polarized differences of 19 and 37GHz are regressed with the SWE. Using the statistical method, a simple and practical algorithm is developed to estimate the snow water equivalent from the differences of 19 and 37GHz in vertical polarization.
英文关键词	snow water equivalent; passive microwave; remote sensing; SSM/I data; Tibetan plateau
WOS研究方向	Remote Sensing ; Optics
WOS类目	Remote Sensing ; Optics
WOS关键词	CLASSIFICATION ; COVER
WOS记录号	WOS:000183305000044
来源期刊	MICROWAVE REMOTE SENSING OF THE ATMOSPHERE AND ENVIRONMENT III
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/241008
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Che, T,Li, X,Armstrong, RL. Estimation of snow water equivalent from passive microwave remote sensing data (SSM/I) in Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2003,4894.
APA	Che, T,Li, X,&Armstrong, RL.(2003).Estimation of snow water equivalent from passive microwave remote sensing data (SSM/I) in Tibetan Plateau.MICROWAVE REMOTE SENSING OF THE ATMOSPHERE AND ENVIRONMENT III,4894.
MLA	Che, T,et al."Estimation of snow water equivalent from passive microwave remote sensing data (SSM/I) in Tibetan Plateau".MICROWAVE REMOTE SENSING OF THE ATMOSPHERE AND ENVIRONMENT III 4894(2003).