气候变化领域集成服务门户(CCPortal): Drivers of eurasian spring snow-cover variability

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DOI	10.1175/JCLI-D-20-0413.1
	Drivers of eurasian spring snow-cover variability
	Zhang T.; Wang T.; Zhao Y.; Chaoyi X.U.; Feng Y.; Liu A.D.A.N.
发表日期	2021
ISSN	08948755
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. © 2021 American Meteorological Society.
英文关键词	Atmospheric circulation; Interannual variability; Snow cover; Teleconnections
语种	英语
scopus关键词	Atmospheric temperature; Oceanography; Orthogonal functions; Sea ice; Surface waters; Arctic Oscillation; Atmospheric teleconnection patterns; Circulation anomalies; Empirical model; Empirical Orthogonal Function; Physical process; Sea surface temperature anomalies; Temporal variation; Snow; air temperature; air-sea interaction; annual variation; atmospheric circulation; empirical orthogonal function analysis; sea ice; sea surface temperature; snow cover; spring (season); teleconnection; Arctic Ocean; Atlantic Ocean; Atlantic Ocean (North); Eurasia; Pacific Ocean; Pacific Ocean (West)
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178675
作者单位	Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Zhang T.,Wang T.,Zhao Y.,et al. Drivers of eurasian spring snow-cover variability[J],2021,34(6).
APA	Zhang T.,Wang T.,Zhao Y.,Chaoyi X.U.,Feng Y.,&Liu A.D.A.N..(2021).Drivers of eurasian spring snow-cover variability.Journal of Climate,34(6).
MLA	Zhang T.,et al."Drivers of eurasian spring snow-cover variability".Journal of Climate 34.6(2021).