DOI: 10.1175/JCLI-D-15-0611.1
Scopus记录号: 2-s2.0-84971379316
论文题名: Impact of ural blocking on winter warm Arctic-cold Eurasian anomalies. Part I: Blocking-induced amplification
作者: Luo D. ; Xiao Y. ; Yao Y. ; Dai A. ; Simmonds I. ; Franzke C.L.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 11 起始页码: 3925
结束页码: 3947
语种: 英语
Scopus关键词: Atmospheric pressure
; Climatology
; Meteorology
; Regression analysis
; Sea ice
; Atmospheric circulation
; Blocking
; Cold air
; Ice loss/growth
; North Atlantic oscillations
; Variability
; Ice
; amplification
; atmospheric circulation
; atmospheric dynamics
; climate variation
; cold air
; North Atlantic Oscillation
; regression analysis
; sea ice
; warming
; winter
; Arctic
; Arctic Ocean
; Atlantic Ocean
; Baffin Bay [Arctic Ocean]
; Barents Sea
; Canada
; Davis Strait
; Eurasia
; Hudson Bay
; Kara Sea
; Labrador Sea
; North America
英文摘要: In Part I of this study, the impact of Ural blocking (UB) on the warm Arctic-cold Eurasian (WACE) pattern associated with the winter (DJF) arctic sea ice loss during 1979-2013 is examined by dividing the arctic sea ice reduction region into two dominant subregions: The Barents and Kara Seas (BKS) and the North American high-latitude (NAH) region (Baffin and Hudson Bay, Davis Strait, and Labrador Sea). It is found that atmospheric response to arctic sea ice loss resembles a negative Arctic response oscillation with a dominant positive height anomaly over the Eurasian subarctic region. Regression analyses of the two subregions further show that the sea ice loss over the BKS corresponds to the UB pattern together with a positive North Atlantic Oscillation (NAO+) and is followed by a WACE anomaly, while the sea ice reduction in the NAH region corresponds to a negative NAO (NAO-) pattern with a cold anomaly over northern Eurasia. Further analyses reveal that the UB pattern is more persistent during the period 2000-13 (P2) than 1979-99 (P1) because of the reduced middle-to-high-latitude mean westerly winds over Eurasia associated with the intense BKS warming. During P2 the establishment of the UB becomes a slow process because of the role of the BKS warming, while its decay is slightly rapid. In the presence of the long-lived UB that often occurs with the NAO+, the BKS-warming-induced DJF-mean anticyclonic anomaly is intensified and widened and then expands southward during P2 to amplify the WACE pattern and induce the southward displacement of its cold anomaly and the further loss of the BKS sea ice. Thus, midlatitude Eurasian cold events should be more frequent as the sea ice loss continues over the BKS. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49900
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; School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia; Meteorological Institute, University of Hamburg, Hamburg, Germany; Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany
Recommended Citation:
Luo D.,Xiao Y.,Yao Y.,et al. Impact of ural blocking on winter warm Arctic-cold Eurasian anomalies. Part I: Blocking-induced amplification[J]. Journal of Climate,2016-01-01,29(11)