DOI: 10.1016/j.atmosres.2019.02.010
Scopus记录号: 2-s2.0-85062150167
论文题名: Regional response of winter snow cover over the Northern Eurasia to late autumn Arctic sea ice and associated mechanism
作者: Xu B. ; Chen H. ; Gao C. ; Zhou B. ; Sun S. ; Zhu S.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 222 起始页码: 100
结束页码: 113
语种: 英语
英文关键词: Arctic oscillation
; Arctic Sea Ice
; Eurasian snow cover
; Regional response
Scopus关键词: Atmospheric temperature
; Clouds
; Land surface temperature
; Sea ice
; Snow melting systems
; Water vapor
; Arctic Oscillation
; Arctic sea ice
; Atmospheric general circulation
; Eurasian snows
; Land surface conditions
; Numerical sensitivity
; Observational analysis
; Regional response
; Snow
英文摘要: Variations of sea ice can exert significant impacts on the atmospheric general circulation, temperature and precipitation, resulting in anomalous land surface conditions such as snow cover. In this study, we explored the possible impacts of the abnormal late autumn Arctic sea ice on winter snow depth over the Eurasia, especially the mechanism responsible for regional response of the snow cover to the sea ice anomalies through both observational analysis based on multi-source snow depth data and numerical sensitivity experiments. Results show that with decreasing sea ice in the Barents and Kara Seas (BKS) region, the snow depth exhibits evident regional responses, which are featured by decreased snow depth in the North Eurasia but increased in central Europe. Further analysis suggests that the Arctic Oscillation (AO) is an important connection between the BKS sea ice and anomalous winter snow depth, which affect both the temperature and the precipitation in winter over the Eurasia. The regional difference mainly comes from significant differences in regional atmospheric general circulation anomalies as well as the various controlling factors affecting the formation of the snowfall. In North Eurasia, water vapor plays a decisive role in the formation of the winter snowfall and further the winter snow depth. Positive (negative) BKS sea ice anomaly generally induces positive (negative) AO pattern, which can enhance (weaken) the zonal wind and increase (decrease) water vapor transportation to the North Eurasia, causing increased (decreased) winter snow depth. In contrast, in Europe, temperature is the dominant factor affecting the formation of the snowfall and the snow depth. Positive (negative) AO pattern, enhances (weakens) the warm moist advection and thus leads to increased (decreased) temperatures in the Europe, consequently resulting in reduced (increased) winter snow depth. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122276
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), International Joint Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology (NUIST), Nanjing, 210044, China; School of Atmospheric Sciences, NUIST, Nanjing, 210044, China; College of Oceanography, Hohai University, Nanjing, 210098, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710075, China
Recommended Citation:
Xu B.,Chen H.,Gao C.,et al. Regional response of winter snow cover over the Northern Eurasia to late autumn Arctic sea ice and associated mechanism[J]. Atmospheric Research,2019-01-01,222