Spatial-temporal variability of snow cover over the Amur River Basin inferred from MODIS daily snow products in recent decades

doi:10.3724/SP.J.1226.2020.00418

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Spatial-temporal variability of snow cover over the Amur River Basin inferred from MODIS daily snow products in recent decades
	Lu, XiaoLin 2; Zhang, WanChang 2; Wang, ShuHang 3; Zhang, Bo 3; Niu, QuanFu 1; Liu, JinPing 2,4; Chen, Hao 2,4; Gao, HuiRan 2,4
刊名	SCIENCES IN COLD AND ARID REGIONS
	2020-12-01
卷号	12 期号:6 页码:418-429
关键词	MODIS SCF SCS SCM Amur River Basin cloud effect removal
ISSN号	1674-3822
DOI	10.3724/SP.J.1226.2020.00418
英文摘要	MODIS snow products MOD10A1\MYD10A1 provided us a unique chance to investigate snow cover as well as its spatial-temporal variability in response to global changes from regional and global perspectives. By means of MODIS snow products MOD10A1\MYD10A1 derived from an extensive area of the Amur River Basin, mainly located in the Northeast part of China, some part in far east area of the former USSR and a minor part in Republic of Mongolia, the reproduced snow datasets after removal of cloud effects covering the whole watershed of the Amur River Basin were generated by using 6 different cloud-effect-removing algorithms. The accuracy of the reproduced snow products was evaluated with the time series of snow depth data observed from 2002 to 2010 within the Chinese part of the basin, and the results suggested that the accuracies for the reproduced monthly mean snow depth datasets derived from 6 different cloud-effect-removing algorithms varied from 82% to 96%, the snow classification accuracies (the harmonic mean of Recall and Precision) was higher than 80%, close to the accuracy of the original snow product under clear sky conditions when snow cover was stably accumulated. By using the reproduced snow product dataset with the best validated cloud-effect-removing algorithm newly proposed, spatial-temporal variability of snow coverage fraction (SCF), the date when snow cover started to accumulate (SCS) as well as the date when being melted off (SCM) in the Amur River Basin from 2002 to 2016 were investigated. The results indicated that the SCF characterized the significant spatial heterogeneity tended to be higher towards East and North but lower toward West and South over the Amur River Basin. The inter-annual variations of SCF showed an insignificant increase in general with slight fluctuations in majority part of the basin. Both SCS and SCM tended to be slightly linear varied and the inter-annual differences were obvious. In addition, a clear decreasing trend in snow cover is observed in the region. Trend analysis (at 10% significance level) showed that 71% of areas between 2,000 and 2,380 m a.s.l. experienced a reduction in duration and coverage of annual snow cover. Moreover, a severe snow cover reduction during recent years with sharp fluctuations was investigated. Overall spatial-temporal variability of Both SCS and SCM tended to coincide with that of SCF over the basin in general.
WOS研究方向	Physical Geography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000608477500009
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155626]
专题	土木工程学院
作者单位	1.Lanzhou Univ Technol, Lanzhou 730050, Gansu, Peoples R China; 2.Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100094, Peoples R China; 3.Chinese Res Inst Environm Sci, Natl Engn Lab Lake Pollut Control & Ecol Restorat, Beijing 100012, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lu, XiaoLin,Zhang, WanChang,Wang, ShuHang,et al. Spatial-temporal variability of snow cover over the Amur River Basin inferred from MODIS daily snow products in recent decades[J]. SCIENCES IN COLD AND ARID REGIONS,2020,12(6):418-429.
APA	Lu, XiaoLin.,Zhang, WanChang.,Wang, ShuHang.,Zhang, Bo.,Niu, QuanFu.,...&Gao, HuiRan.(2020).Spatial-temporal variability of snow cover over the Amur River Basin inferred from MODIS daily snow products in recent decades.SCIENCES IN COLD AND ARID REGIONS,12(6),418-429.
MLA	Lu, XiaoLin,et al."Spatial-temporal variability of snow cover over the Amur River Basin inferred from MODIS daily snow products in recent decades".SCIENCES IN COLD AND ARID REGIONS 12.6(2020):418-429.