DOI: 10.1175/JCLI-D-16-0548.1
Scopus记录号: 2-s2.0-85015837860
论文题名: Ural blocking as an amplifier of the Arctic sea ice decline in winter
作者: Gong T. ; Luo D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 7 起始页码: 2639
结束页码: 2654
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Infrared radiation
; Oceanography
; Sea ice
; Surface waters
; Temperature
; Blocking
; High Latitudes
; Ice loss/growth
; Moisture flux convergences
; North Atlantic
; North Atlantic oscillations
; Sea surface temperature (SST)
; Surface air temperatures
; Ice
; air temperature
; atmosphere-ice-ocean system
; infrared radiation
; North Atlantic Oscillation
; sea ice
; warming
; westerly
; winter
; Arctic Ocean
; Atlantic Ocean
; Atlantic Ocean (East)
; Barents Sea
; Kara Sea
; Russian Federation
; Urals
英文摘要: In this paper, the lead-lag relationship between the Arctic sea ice variability over the Barents-Kara Sea (BKS) and Ural blocking (UB) in winter (DJF) ranging from 1979/80 to 2011/12 is examined. It is found that in a regressed DJF-mean field an increased UB frequency (days) corresponds to an enhanced sea ice decline over the BKS, while the high sea surface temperature over the BKS is accompanied by a significant Arctic sea ice reduction. Lagged daily regression and correlation reveal that the growth and maintenance of the UB that is related to the positive North Atlantic Oscillation (NAO+) through the negative east Atlantic/west Russia (EA/WR-) wave train is accompanied by an intensified negative BKS sea ice anomaly, and the BKS sea ice reduction lags the UB pattern by about four days. Because the intensified UB pattern occurs together with enhanced downward infrared radiation (IR) associated with the intensified moisture flux convergence and total column water over the BKS, the UB pattern contributes significantly to the BKS sea ice decrease on a time scale of weeks through intensified positive surface air temperature (SAT) anomalies resulting from enhanced downward IR. It is also found that the BKS sea ice decline can persistently maintain even when the UB has disappeared, thus indicating that the UB pattern is an important amplifier of the BKS sea ice reduction. Moreover, it is demonstrated that the EA/WR- wave train formed by the combined NAO+ and UB patterns is closely related to the amplified warming over the BKS through the strengthening (weakening) of mid-to-high-latitude westerly wind in the North Atlantic (Eurasia). © 2017 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; PSU, Pennsylvania State University
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49783
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Oceanography, Chinese Academy of Science, Qingdao, China; CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, China
Recommended Citation:
Gong T.,Luo D.. Ural blocking as an amplifier of the Arctic sea ice decline in winter[J]. Journal of Climate,2017-01-01,30(7)