气候变化领域集成服务门户(CCPortal): Soil moisture mapping over the central part of the Tibetan Plateau using a series of ASAR WS images

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DOI	10.1016/j.rse.2011.05.029
	Soil moisture mapping over the central part of the Tibetan Plateau using a series of ASAR WS images
	van der Velde, Rogier; Su, Zhongbo; van Oevelen, Peter; Wen, Jun; Ma, Yaoming; Salama, Mhd Suhyb
通讯作者	van der Velde, R (通讯作者)
发表日期	2012
ISSN	0034-4257
EISSN	1879-0704
起始页码	175
结束页码	187
卷号	120
英文摘要	The wide swath (WS) and global monitoring (GM) modes of the Advanced Synthetic Aperture Radar (ASAR) provide for monitoring purposes a good compromise between the spatial coverage, spatial resolution and revisit time. Similar imaging modes will be a part of the Sentinel-1 SAR sensing system. A consequence of operating at the wider swath is, however, the rather large view angle range (about 16-43 degrees), which needs to be corrected for if biophysical variables are to be retrieved from these data sets. A soil moisture retrieval algorithm based on the Integral Equation Method (IEM) scattering model is presented that explicitly simulates the backscatter as a function of the incidence angle instead of normalizing. This algorithm is applied to 150 ASAR WS scenes collected from April 2005 to September 2007 over the central part of the Tibetan Plateau. We selected three of these images covering the study area at different view angles during the winter season for the IEM roughness derivation. Subsequently, soil moisture is retrieved from the entire sigma(degrees) data sets via inversion of the IEM model with the obtained roughness parameters as input. The retrievals are validated against soil moisture measured from July 2006 to September 2007 at four sites representative for a 10 x 10 km(2) area. Further, the uncertainties following from assumptions made for the development of the algorithm are also quantified. (C) 2012 Elsevier Inc. All rights reserved.
关键词	SYNTHETIC-APERTURE RADAR ERS WIND SCATTEROMETER SURFACE-ROUGHNESS SATELLITE MISSION ERS/SAR DATA BARE SOIL RETRIEVAL LAND VARIABILITY SIGNATURES
英文关键词	Soil moisture; ASAR WS; Angular sigma(degrees) response; The Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000303300000017
来源期刊	REMOTE SENSING OF ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258058
推荐引用方式 GB/T 7714	van der Velde, Rogier,Su, Zhongbo,van Oevelen, Peter,et al. Soil moisture mapping over the central part of the Tibetan Plateau using a series of ASAR WS images[J]. 中国科学院青藏高原研究所,2012,120.
APA	van der Velde, Rogier,Su, Zhongbo,van Oevelen, Peter,Wen, Jun,Ma, Yaoming,&Salama, Mhd Suhyb.(2012).Soil moisture mapping over the central part of the Tibetan Plateau using a series of ASAR WS images.REMOTE SENSING OF ENVIRONMENT,120.
MLA	van der Velde, Rogier,et al."Soil moisture mapping over the central part of the Tibetan Plateau using a series of ASAR WS images".REMOTE SENSING OF ENVIRONMENT 120(2012).