气候变化领域集成服务门户(CCPortal): Spatiotemporal variability of snow cover and snow water equivalent in the last three decades over Eurasia

CCPortal

DOI	10.1016/j.jhydrol.2018.02.031
	Spatiotemporal variability of snow cover and snow water equivalent in the last three decades over Eurasia
	Zhang, Yinsheng; Ma, Ning
通讯作者	Zhang, YS ; Ma, N (通讯作者)
发表日期	2018
ISSN	0022-1694
EISSN	1879-2707
起始页码	238
结束页码	251
卷号	559
英文摘要	Changes in the extent and amount of snow cover in Eurasia are of great interest because of their vital impacts on the global climate system and regional water resource management. This study investigated the spatial and temporal variability of the snow cover extent (SCE) and snow water equivalent (SWE) of the continental Eurasia using the Northern Hemisphere Equal-Area Scalable Earth Grid (EASE-Grid) Weekly SCE data for 1972-2006 and the Global Monthly EASE-Grid SWE data for 1979-2004. The results indicated that, in general, the spatial extent of snow cover significantly decreased during spring and summer, but varied little during autumn and winter over Eurasia in the study period. The date at which snow cover began to disappear in spring has significantly advanced, whereas the timing of snow cover onset in autumn did not vary significantly during 1972-2006. The snow cover persistence period declined significantly in the western Tibetan Plateau as well as partial area of Central Asia and northwestern Russia, but varied little in other parts of Eurasia. Snow-free breaks (SFBs) with intermittent snow cover in the cold season were principally observed in the Tibetan Plateau and Central Asia, causing a low sensitivity of snow cover persistence period to the timings of snow cover onset and disappearance over the areas with shallow snow. The averaged SFBs were 1-14 weeks during the study period and the maximum intermittence could even reach 25 weeks in certain years. At a seasonal scale, SWE usually peaked in February or March, but fell gradually since April across Eurasia. Both annual mean and annual maximum SWE decreased significantly during 1979-2004 in most parts of Eurasia except for eastern Siberia as well as northwestern and northeastern China. The possible cross-platform inconsistencies between two passive microwave radiometers may cause uncertainties in the detected trends of SWE here, suggesting an urgent need of producing a long-term, more homogeneous SWE product in future. (C) 2018 Elsevier B.V. All rights reserved.
关键词	SOIL-MOISTURE SIBERIAN SNOW ARCTIC OSCILLATION TIBETAN PLATEAU DEPTH DATA CLIMATE WINTER TEMPERATURE PRODUCTS RAINFALL
英文关键词	Eurasia; Snow cover fraction; Snow cover phenology; Snow cover persistence period; Snow-free breaks; Snow water equivalent
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000430902000019
来源期刊	JOURNAL OF HYDROLOGY
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/259160
推荐引用方式 GB/T 7714	Zhang, Yinsheng,Ma, Ning. Spatiotemporal variability of snow cover and snow water equivalent in the last three decades over Eurasia[J]. 中国科学院青藏高原研究所,2018,559.
APA	Zhang, Yinsheng,&Ma, Ning.(2018).Spatiotemporal variability of snow cover and snow water equivalent in the last three decades over Eurasia.JOURNAL OF HYDROLOGY,559.
MLA	Zhang, Yinsheng,et al."Spatiotemporal variability of snow cover and snow water equivalent in the last three decades over Eurasia".JOURNAL OF HYDROLOGY 559(2018).