DOI: 10.1175/JCLI-D-13-00549.1
Scopus记录号: 2-s2.0-84906834823
论文题名: Summer arctic atmospheric circulation response to spring eurasian snow cover and its possible linkage to accelerated sea ice decrease
作者: Matsumura S. ; Zhang X. ; Yamazaki K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 17 起始页码: 6551
结束页码: 6558
语种: 英语
Scopus关键词: Climatology
; Sea level
; Snow melting systems
; Adiabatic heating
; Anticyclonic circulation
; Atmospheric circulation
; Negative phase
; Northern annular mode
; Sea level pressure
; Seasonal prediction
; Surface albedo
; Sea ice
英文摘要: Anticyclonic circulation has intensified over theArcticOcean in summer during recent decades.However, the underlying mechanism is, as yet, not well understood. Here, it is shown that earlier spring Eurasian snowmelt leads to anomalously negative sea level pressure (SLP) over Eurasia and positive SLP over theArctic,which has strong projection on the negative phase of the northern annular mode (NAM) in summer through the wave- mean flowinteraction. Specifically, earlier spring snowmelt overEurasia leads to a warmer land surface, because of reduced surface albedo. The warmed surface amplifies stationary Rossby waves, leading to a deceleration of the subpolar jet. As a consequence, rising motion is enhanced over the land, and compensating subsidence and adiabatic heating occur in the Arctic troposphere, forming the negative NAM. The intensified anticyclonic circulation has played a contributing role in accelerating the sea ice decline observed during the last two decades. The results here provide important information for improving seasonal prediction of summer sea ice cover. © 2014 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51164
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan; International Arctic Research Center, Department of Atmospheric Sciences, University of Alaska Fairbanks, Fairbanks, AK, United States; National Institute of Polar Research, Tokyo, Japan; Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan
Recommended Citation:
Matsumura S.,Zhang X.,Yamazaki K.. Summer arctic atmospheric circulation response to spring eurasian snow cover and its possible linkage to accelerated sea ice decrease[J]. Journal of Climate,2014-01-01,27(17)