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Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold
Zhang, HB (Zhang, Hongbo)1; Zhang, F (Zhang, Fan)1,2,3; Zhang, GQ (Zhang, Guoqing)1,2; Che, T (Che, Tao)4; Yan, W (Yan, Wei)5; Ye, M (Ye, Ming)6; Ma, N (Ma, Ning)1
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
2019
Volume651Issue:0Pages:2712-2726
DOI10.1016/j.scitotenv.2018.10.128
Abstract

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.

Subject AreaEnvironmental Sciences
WOS IDWOS:000450551600101
Language英语
Indexed BySCI
KeywordTibetan Plateau Northern Xinjiang Cloud Mask Area Data Variability Validation Depth Simulation Hydrology Agreement
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Cooperation Status国际
ISSN0048-9697
Department环境变化与地表过程
URL查看原文
PublisherELSEVIER SCIENCE BV
SubtypeArticle
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9399
Collection图书馆
Corresponding AuthorZhang, F (Zhang, Fan)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China;
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
3.Univ Chinese Acad Sci, Beijing, Peoples R China;
4.Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China;
5.Xinyang Normal Univ, Sch Geog Sci, Xinyang 464000, Peoples R China;
6.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA.
Recommended Citation
GB/T 7714
Zhang, HB ,Zhang, F ,Zhang, GQ ,et al. Ground-based evaluation of MODIS snow cover product V6 across China: Implications for the selection of NDSI threshold[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,651(0):2712-2726.
APA Zhang, HB .,Zhang, F .,Zhang, GQ .,Che, T .,Yan, W .,...&Ma, N .(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(0),2712-2726.
MLA Zhang, HB ,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 651.0(2019):2712-2726.
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