globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-15-0612.1
Scopus记录号: 2-s2.0-84971405907
论文题名:
Impact of Ural blocking on winter warm Arctic-cold Eurasian anomalies. Part II: The link to the North Atlantic Oscillation
作者: Luo D.; Xiao Y.; Diao Y.; Dai A.; Franzke C.L.E.; Simmonds I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期:11
起始页码: 3949
结束页码: 3971
语种: 英语
Scopus关键词: Amplification ; Atmospheric pressure ; Atmospheric structure ; Atmospheric circulation ; Blocking ; Cold air ; North Atlantic oscillations ; Variability ; Oceanography ; air-sea interaction ; atmospheric blocking ; atmospheric circulation ; cold air ; North Atlantic Oscillation ; wave propagation ; zonal wind ; Arctic ; China
英文摘要: In Part I of this study, the Ural blocking (UB)-induced amplification role of winter warm Arctic-cold Eurasian (WACE) anomalies has been examined. It was found that the long-lived UB together with the positive North Atlantic Oscillation (NAO+) significantly contributes to the amplification of the WACE pattern. The present study examines how the UB variability affects quasi-biweekly WACE (QB-WACE) anomalies and depends on the NAO+ and North Atlantic conditions by classifying the UB based on a case study of a cold event that occurred over southern China in January 2008. A composite analysis during 1979-2013 shows that the QB-WACE anomalies associated with the UB that often occur with the NAO+ are strong and influenced by the North Atlantic jet (NAJ) and zonal wind strengths over Eurasia. For NAO+-related UB, the QB-WACE anomaly depends strongly on the location of UB, and the UB anomalies lag the NAO+ by approximately 4-7 days. The strength of the NAJ determines whether the combined NAO+ and UB anomalies exhibit a negative East Atlantic/West Russia (EA/WR-) pattern, while the region of weak zonal winds over Eurasia and the zonal extent of the NAJ dominate the location of UB. For southward-, eastward-, and westward-displaced UBs associated with a strong NAJ, the NAO+ favors the UB with a southward-displaced QB-WACE anomaly through wave train propagation like an EA/WR- pattern. Eastward- and southward-displaced UB anomalies induce similarly displaced cold anomalies with intrusion into southern China. However, for a northward-displaced UB, this happens without pronounced EA/WR- patterns because of a weak NAJ and is accompanied by a northward-displaced QB-WACE anomaly. © 2016 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49913
Appears in Collections:气候变化事实与影响

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作者单位: RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Physical Oceanography Laboratory, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao, China; Shanxi Meteorological Observatory, Xi'an, China; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States; National Center for Atmospheric Research, Boulder, CO, United States; Meteorological Institute, University of Hamburg, Hamburg, Germany; Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany; School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia

Recommended Citation:
Luo D.,Xiao Y.,Diao Y.,et al. Impact of Ural blocking on winter warm Arctic-cold Eurasian anomalies. Part II: The link to the North Atlantic Oscillation[J]. Journal of Climate,2016-01-01,29(11)
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