DOI: 10.1175/JCLI-D-14-00822.1
Scopus记录号: 2-s2.0-84944775443
论文题名: The melting arctic and midlatitude weather patterns: Are they connected?
作者: Overland J. ; Francis J.A. ; Hall R. ; Hanna E. ; Kim S.-J. ; Vihma T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 20 起始页码: 7917
结束页码: 7932
语种: 英语
英文摘要: The potential of recent Arctic changes to influence hemispheric weather is a complex and controversial topic with considerable uncertainty, as time series of potential linkages are short (<10 yr) and understanding involves the relative contribution of direct forcing by Arctic changes on a chaotic climatic system. A way forward is through further investigation of atmospheric dynamic mechanisms. During several exceptionally warm Arctic winters since 2007, sea ice loss in the Barents and Kara Seas initiated eastward-propagating wave trains of high and low pressure. Anomalous high pressure east of the Ural Mountains advected Arctic air over central and eastern Asia, resulting in persistent cold spells. Blocking near Greenland related to low-level temperature anomalies led to northerly flow into eastern North America, inducing persistent cold periods. Potential Arctic connections in Europe are less clear. Variability in the North Pacific can reinforce downstream Arctic changes, and Arctic amplification can accentuate the impact of Pacific variability. The authors emphasize multiple linkage mechanisms that are regional, episodic, and based on amplification of existing jet stream wave patterns, which are the result of a combination of internal variability, lower-tropospheric temperature anomalies, and midlatitude teleconnections. The quantitative impact of Arctic change on midlatitude weather may not be resolved within the foreseeable future, yet new studies of the changing Arctic and subarctic low-frequency dynamics, together with additional Arctic observations, can contribute to improved skill in extended-range forecasts, as planned by the WMO Polar Prediction Project (PPP). © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50568
Appears in Collections: 气候变化事实与影响
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作者单位: NOAA/Pacific Marine Environmental Laboratory, Seattle, WA, United States; Department of Marine and Coastal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Department of Geography, University of Sheffield, Sheffield, United Kingdom; Korea Polar Research Institute, Incheon, South Korea; Finnish Meteorological Institute, Helsinki, Finland
Recommended Citation:
Overland J.,Francis J.A.,Hall R.,et al. The melting arctic and midlatitude weather patterns: Are they connected?[J]. Journal of Climate,2015-01-01,28(20)