气候变化领域集成服务门户(CCPortal): Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold

CCPortal

DOI	10.1016/j.scitotenv.2018.10.128
	Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold
	Zhang, Hongbo; Zhang, Fan; Zhang, Guoqing; Che, Tao; Yan, Wei; Ye, Ming; Ma, Ning
发表日期	2019
ISSN	0048-9697
EISSN	1879-1026
起始页码	2712
结束页码	2726
卷号	651
英文摘要	The new MODIS daily NDSI snow cover product version 6 (V6) is released to replace V5 with significant revisions. This study evaluates, for the first time, the accuracy of product V6 across China based on daily snow-depth measurements during 2003-2013 from 279 and 252 stations for Terra and Aqua, respectively. Three schemes of selecting NDSI thresholds for Terra and Aqua were tested and compared including: (1) the locally optimal NDSI threshold, (2) the minimum valid NDSI of 0.1, and (3) the global reference NDSI threshold of 0.4. The mean Cohen's Kappa (CK) of the optimal, minimum and global reference thresholds for Terra (Aqua) are 0.80 (0.60), 0.77 (0.58), 0.72 (0.51), respectively, while snow depth 1 cm. The NDSI threshold of 0.1 is demonstrated to be more reasonable than the threshold of 0.4 for use in China This is also supported by the accuracy comparison conducted for the dear-day snow-cover day calculation. Terra V6 and Terra V5 have comparable accuracies whereas Aqua V6 shows better accuracy than Aqua V5 does. The revised temperature screen algorithm employed in V6 is found to be problematic with large snow commission errors in high altitude stations. Regionally, product V6 presents low CKs of 0.61 and 0.35 for the optimal thresholds of Terra and Aqua in the Tibetan Plateau, which are attributed to its high elevation and relatively small snow depth. This study provides practical implications for use of MODIS snow cover production V6 in China. (C) 2018 Elsevier B.V. All rights reserved.
英文关键词	MODIS snow cover product; Snow depth observation; NDSI threshold; China
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS关键词	TIBETAN PLATEAU ; NORTHERN XINJIANG ; CLOUD MASK ; AREA DATA ; VARIABILITY ; VALIDATION ; DEPTH ; SIMULATION ; HYDROLOGY ; AGREEMENT
WOS记录号	WOS:000450551600101
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/241056
作者单位	[Zhang, Hongbo; Zhang, Fan; Zhang, Guoqing; Ma, Ning] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China; [Zhang, Fan; Zhang, Guoqing] CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China; [Zhang, Fan] Univ Chinese Acad Sci, Beijing, Peoples R China; [Che, Tao] Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Yan, Wei] Xinyang Normal Univ, Sch Geog Sci, Xinyang 464000, Peoples R China; [Ye, Ming] Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA
推荐引用方式 GB/T 7714	Zhang, Hongbo,Zhang, Fan,Zhang, Guoqing,et al. Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold[J]. 中国科学院西北生态环境资源研究院,2019,651.
APA	Zhang, Hongbo.,Zhang, Fan.,Zhang, Guoqing.,Che, Tao.,Yan, Wei.,...&Ma, Ning.(2019).Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold.SCIENCE OF THE TOTAL ENVIRONMENT,651.
MLA	Zhang, Hongbo,et al."Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold".SCIENCE OF THE TOTAL ENVIRONMENT 651(2019).