气候变化领域集成服务门户(CCPortal): Assessment of soil water deficit for the middle reaches of Yarlung-Zangbo River from optical and passive microwave images

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DOI	10.1016/j.rse.2013.11.008
	Assessment of soil water deficit for the middle reaches of Yarlung-Zangbo River from optical and passive microwave images
	Zhong, Lei; Ma, Yaoming; Fu, Yunfei; Pan, Xiao; Hu, Wei; Su, Zhongbo; Salama, Mhd. Suhyb; Feng, Lu
通讯作者	Zhong, L (通讯作者)
发表日期	2014
ISSN	0034-4257
EISSN	1879-0704
起始页码	1
结束页码	8
卷号	142
英文摘要	The middle reaches of Yarlung-Zangbo River (YZR) and its two tributaries (Lhasa River and Nianchu River) is a main agricultural region in central Tibet Autonomous Region. Soil water deficit (SWD) estimation has significant relevance to local crop growth monitoring, crop yield assessment and disaster monitoring. It also has great theoretical importance for understanding the local energy and water balance status. In this paper, AVHRR and MODIS data on 14 April 2003, 16 October 2003 under nearly clear weather conditions are selected as the spring and autumn cases. Land surface parameters, such as land surface temperature, surface albedo, Normalized Difference Vegetation Index, and emissivity, have been derived from different algorithms for AVHRR and MODIS data. In combination with meteorological data, the soil water deficit index is determined by applying Surface Energy Balance System. The R square values between SWDI and AMSR-E soil moisture are ranging from 0.457 to 0.607, with spring SWD being much more severe than that in autumn. The limited river runoff (less than 5% of the annual total) is the dominant factor for spring SWD. This study also reveals that the derived spring SWD from AVHRR and MODIS data is quite different on the same day. This phenomenon is caused by different satellite overpass times which influence the melting frozen soil. This also confirms that the soil moisture may have diurnal variations. The spatial variations of SWD conditions in the middle reaches of YZR and its two tributaries have been clearly identified. (C) 2013 Elsevier Inc All rights reserved.
关键词	SURFACE-TEMPERATURE DROUGHT LAND VALIDATION MOISTURE ALGORITHM NETWORK CHINA AVHRR TIBET
英文关键词	Surface Energy Balance System; Soil moisture; 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:000331023000001
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/258345
推荐引用方式 GB/T 7714	Zhong, Lei,Ma, Yaoming,Fu, Yunfei,et al. Assessment of soil water deficit for the middle reaches of Yarlung-Zangbo River from optical and passive microwave images[J]. 中国科学院青藏高原研究所,2014,142.
APA	Zhong, Lei.,Ma, Yaoming.,Fu, Yunfei.,Pan, Xiao.,Hu, Wei.,...&Feng, Lu.(2014).Assessment of soil water deficit for the middle reaches of Yarlung-Zangbo River from optical and passive microwave images.REMOTE SENSING OF ENVIRONMENT,142.
MLA	Zhong, Lei,et al."Assessment of soil water deficit for the middle reaches of Yarlung-Zangbo River from optical and passive microwave images".REMOTE SENSING OF ENVIRONMENT 142(2014).