DOI: 10.1007/s00382-017-4026-x
Scopus记录号: 2-s2.0-85035799873
论文题名: Impacts of early autumn Arctic sea ice concentration on subsequent spring Eurasian surface air temperature variations
作者: Chen S. ; Wu R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 2018-07-08 起始页码: 2523
结束页码: 2542
语种: 英语
英文关键词: Autumn Arctic sea ice
; Spring Arctic Oscillation
; Surface air temperature
Scopus关键词: air temperature
; Arctic Oscillation
; autumn
; concentration (composition)
; midlatitude environment
; polar vortex
; sea ice
; spring (season)
; stratosphere
; surface temperature
; temperature gradient
; troposphere
; westerly
; zonal wind
; Arctic Ocean
; Beaufort Sea
; Eurasia
; Laptev Sea
英文摘要: This study reveals a close relation between autumn Arctic sea ice change (SIC) in the Laptev Sea-eastern Siberian Sea-Beaufort Sea and subsequent spring Eurasian surface air temperature (SAT) variation. Specifically, more (less) SIC over the above regions in early autumn generally correspond to SAT warming (cooling) over the mid-high latitudes of Eurasia during subsequent spring. Early autumn Arctic SIC affects spring Eurasian SAT via modulating spring Arctic Oscillation (AO) associated atmospheric changes. The meridional temperature gradient over the mid-high latitudes decreases following the Arctic sea ice loss. This results in deceleration of prevailing westerly winds over the mid-latitudes of the troposphere, which leads to increase in the upward propagation of planetary waves and associated Eliassen-Palm flux convergence in the stratosphere over the mid-high latitudes. Thereby, westerly winds in the stratosphere are reduced and the polar vortex is weakened. Through the wave-mean flow interaction and downward propagation of zonal wind anomalies, a negative spring AO pattern is formed in the troposphere, which favors SAT cooling over Eurasia. The observed autumn Arctic SIC-spring Eurasian SAT connection is reproduced in the historical simulation (1850–2005) of the flexible global ocean-atmosphere-land system model, spectral version 2 (FGOALS-s2). The FGOALS-s2 also simulates the close connection between autumn SIC and subsequent spring AO. Further analysis suggests that the prediction skill of the spring Eurasian SAT was enhanced when taking the autumn Arctic SIC signal into account. © 2017, Springer-Verlag GmbH Germany, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109105
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Chen S.,Wu R.. Impacts of early autumn Arctic sea ice concentration on subsequent spring Eurasian surface air temperature variations[J]. Climate Dynamics,2018-01-01,51(2018-07-08)