气候变化领域集成服务门户(CCPortal): Drivers of Eurasian Spring Snow-Cover Variability

CCPortal

DOI	10.1175/JCLI-D-20-0413.1
	Drivers of Eurasian Spring Snow-Cover Variability
	Zhang, Taotao; Wang, Tao; Zhao, Yutong; Xu, Chaoyi; Feng, Yingying; Liu, Dan
通讯作者	Wang, T (通讯作者)
发表日期	2021
ISSN	0894-8755
EISSN	1520-0442
起始页码	2037
结束页码	2052
卷号	34 期号:6
英文摘要	The variability of spring snow cover over Eurasia can have notable impacts on the current and following season climate, but the causes of it are poorly understood. This study investigates the potential drivers and the associated physical processes for the first two empirical orthogonal function (EOF) modes of the Eurasian spring snow-cover variability during 1967-2018, which are characterized by a continent-wide coherent pattern and a west-east dipole structure, respectively. Analyses show that the spring surface air temperature and snowfall are the direct factors influencing the two modes. We further examined the contributions to the snow-cover variability of atmospheric teleconnection patterns, sea surface temperature (SST) anomalies, and variations of Arctic sea ice during spring. The results indicate that circulation anomalies associated with the Arctic Oscillation, Polar-Eurasian pattern, and West Pacific pattern can partly explain the formation of the EOF1 mode, while the EOF2 mode has a close relationship with the East Atlantic-Western Russia pattern. In addition, a horseshoe-like monopole structure of SST anomalies over the North Atlantic plays an important role in regulating the EOF2 mode by inducing a wave train circulation. Moreover, the EOF2 mode is also affected by anomalous circulations induced by the sea ice anomalies in the Barents-Kara Seas. An empirical model using these drivers satisfactorily reproduced the temporal variations of the two EOF modes, implying that our results can substantially improve comprehension of the variability of Eurasian spring snow cover.
关键词	ARCTIC SEA-ICE NORTH-ATLANTIC OSCILLATION INDIAN-SUMMER MONSOON WAVE-ACTIVITY FLUX SURFACE-TEMPERATURE ATMOSPHERIC CIRCULATION GEOPOTENTIAL HEIGHT WATER EQUIVALENT WINTER CLIMATE
英文关键词	Atmospheric circulation; Teleconnections; Snow cover; Interannual variability
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000646372800004
来源期刊	JOURNAL OF CLIMATE
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/260152
推荐引用方式 GB/T 7714	Zhang, Taotao,Wang, Tao,Zhao, Yutong,et al. Drivers of Eurasian Spring Snow-Cover Variability[J]. 中国科学院青藏高原研究所,2021,34(6).
APA	Zhang, Taotao,Wang, Tao,Zhao, Yutong,Xu, Chaoyi,Feng, Yingying,&Liu, Dan.(2021).Drivers of Eurasian Spring Snow-Cover Variability.JOURNAL OF CLIMATE,34(6).
MLA	Zhang, Taotao,et al."Drivers of Eurasian Spring Snow-Cover Variability".JOURNAL OF CLIMATE 34.6(2021).