气候变化领域集成服务门户(CCPortal): Ground observed climatology and trend in snow cover phenology across China with consideration of snow-free breaks

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DOI	10.1007/s00382-020-05422-z
	Ground observed climatology and trend in snow cover phenology across China with consideration of snow-free breaks
	Ma, Ning; Yu, Kunlun; Zhang, Yinsheng; Zhai, Jianqing; Zhang, Yongqiang; Zhang, Hongbo
通讯作者	Ma, N (通讯作者)
发表日期	2020
ISSN	0930-7575
EISSN	1432-0894
起始页码	2867
结束页码	2887
卷号	55 期号:9-10
英文摘要	Accurate understanding of snow cover phenology and its changes is important to hydrological processes and climate system. Having recognized the potential uncertainties in remote sensing snow cover products, we used daily snow depth observations from 514 meteorological stations across China to investigate the spatiotemporal variations in snow cover phenology during 1970-2014. Climatologically, the snow cover onset date (D-o) and end date (D-e) as well as the number of snow cover days (D-s) depended on latitude at most stations outside of the Tibetan Plateau (TP). For the high-elevation stations, which were mainly in the TP, multiple snow-free breaks (SFBs) during the cold season made D-s insensitive to D-o and D-e. Furthermore, the number of SFBs (D-b) increased significantly with the rise in elevation, explaining why higher altitudes in TP did not necessarily have greater D-s values despite the earlier D-o and later D-e values. From 1970 to 2014, most stations in China exhibited delayed D-o and advanced D-e due mainly to the increased temperature, but such trends were significant at only 10.5% and 15.4% of the stations, respectively. During the same period, shortened D-s primarily occurred south of similar to 40 degrees N, whereas the opposite ones dominated north of similar to 40 degrees N. Most stations (except those in Hexi Corridor) with significant growth in D-s were characterized by delayed D-o and advanced D-e. Such a phenomenon of increased snow cover days during shortened cold season was due to the significant shrinkage in D-b values. The spatial pattern of the trends in annual total snow depth overall follows that of D-s, suggesting that the D-s, when takes SFBs into consideration, could be an indicator of variations of snow water resources in China. The trends in D-o, D-e and D-s were not elevation dependent in TP.
关键词	TIBETAN PLATEAU SPATIOTEMPORAL VARIABILITY ALTITUDINAL DEPENDENCE WATER AVAILABILITY IN-SITU WESTERN PRODUCTS DEPTH COMBINATION EQUIVALENT
英文关键词	Snow cover phenology; Snow-free breaks; The number of snow cover days; Snow depth; Station measurements; Altitudinal dependence
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000563843100003
来源期刊	CLIMATE DYNAMICS
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/259863
推荐引用方式 GB/T 7714	Ma, Ning,Yu, Kunlun,Zhang, Yinsheng,et al. Ground observed climatology and trend in snow cover phenology across China with consideration of snow-free breaks[J]. 中国科学院青藏高原研究所,2020,55(9-10).
APA	Ma, Ning,Yu, Kunlun,Zhang, Yinsheng,Zhai, Jianqing,Zhang, Yongqiang,&Zhang, Hongbo.(2020).Ground observed climatology and trend in snow cover phenology across China with consideration of snow-free breaks.CLIMATE DYNAMICS,55(9-10).
MLA	Ma, Ning,et al."Ground observed climatology and trend in snow cover phenology across China with consideration of snow-free breaks".CLIMATE DYNAMICS 55.9-10(2020).