气候变化领域集成服务门户(CCPortal): Improved Landsat-Based Water and Snow Indices for Extracting Lake and Snow Cover/Glacier in the Tibetan Plateau

CCPortal

DOI	10.3390/w12051339
	Improved Landsat-Based Water and Snow Indices for Extracting Lake and Snow Cover/Glacier in the Tibetan Plateau
	Yan, Dajiang; Huang, Chang; Ma, Ning; Zhang, Yinsheng
通讯作者	Ma, N (通讯作者)
发表日期	2020
EISSN	2073-4441
卷号	12 期号:5
英文摘要	Identifying water and snow cover/glaciers (SCG) accurately is of great importance for monitoring different water resources in the Tibetan Plateau. However, discriminating between water and SCG remains a difficult task because of their similar spectral characteristic according to the physical principles of remote sensing. To efficiently distinguish different kinds of water resources automatically, here we proposed two new indices including: (i) the normalized difference water index with no SCG information (NDWIns) to extract lake water and suppress SCG: and (ii) the normalized difference snow index with no water information (NDSInw) to extract SCG and suppress lake water. Both new water and snow indices were tested in the Tibetan Plateau using Landsat series, showing that the overall accuracies of NDWIns and NDSInw were in the range of 94.6-97.0% and 94.9-97.0% in mapping the lake water from SCG and mapping the SCG from lake water, respectively. Further comparisons suggest that these new two indices improved upon the previous normalized difference snow index/modified normalized difference water index (NDSI/MNDWI) in mapping the water body and SCG. While the present study only focuses on the validation over certain areas in Tibetan Plateau, the newly proposed NDWIns and NDSInw have the potential for better monitoring the lake water and snow/glacier areas over other cold regions around the globe.
关键词	NORMALIZED DIFFERENCE SNOW CLOUD SHADOW COVER MODIS VARIABILITY VEGETATION ALGORITHM NDWI OLI SELECTION
英文关键词	NDWIns; NDSInw; lake; snow cover and glacier; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Environmental Sciences ; Water Resources
WOS记录号	WOS:000555915200118
来源期刊	WATER
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/259838
推荐引用方式 GB/T 7714	Yan, Dajiang,Huang, Chang,Ma, Ning,et al. Improved Landsat-Based Water and Snow Indices for Extracting Lake and Snow Cover/Glacier in the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2020,12(5).
APA	Yan, Dajiang,Huang, Chang,Ma, Ning,&Zhang, Yinsheng.(2020).Improved Landsat-Based Water and Snow Indices for Extracting Lake and Snow Cover/Glacier in the Tibetan Plateau.WATER,12(5).
MLA	Yan, Dajiang,et al."Improved Landsat-Based Water and Snow Indices for Extracting Lake and Snow Cover/Glacier in the Tibetan Plateau".WATER 12.5(2020).