DOI: 10.1175/JCLI-D-15-0169.1
Scopus记录号: 2-s2.0-84946546974
论文题名: Mechanisms of stratospheric and tropospheric circulation response to projected Arctic sea ice loss
作者: Sun L. ; Deser C. ; Tomas R.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 19 起始页码: 7824
结束页码: 7845
语种: 英语
Scopus关键词: Atmospheric pressure
; Climate models
; Climatology
; Meteorology
; Production platforms
; Sea ice
; Troposphere
; Upper atmosphere
; Vortex flow
; Wave propagation
; Arctic
; Atmospheric circulation
; Community atmosphere model
; North Atlantic oscillations
; Stratosphere-troposphere coupling
; Stratospheric polar vortex
; Surface boundary conditions
; Whole atmosphere community climate models
; Ice
; atmosphere-ice-ocean system
; atmospheric circulation
; atmospheric dynamics
; boundary condition
; climate modeling
; North Atlantic Oscillation
; sea ice
; stratosphere-troposphere interaction
; surface structure
; Arctic
英文摘要: The impact of projected Arctic sea ice loss on the atmospheric circulation is investigated using the Whole Atmosphere Community Climate Model (WACCM), a model with a well-resolved stratosphere. Two 160-yr simulations are conducted: one with surface boundary conditions fixed at late twentieth-century values and the other with identical conditions except for Arctic sea ice, which is prescribed at late twenty-first-century values. Their difference isolates the impact of future Arctic sea ice loss upon the atmosphere. The tropospheric circulation response to the imposed ice loss resembles the negative phase of the northern annular mode, with the largest amplitude in winter, while the less well-known stratospheric response transitions from a slight weakening of the polar vortex in winter to a strengthening of the vortex in spring. The lack of a significant winter stratospheric circulation response is shown to be a consequence of largely cancelling effects from sea ice loss in the Atlantic and Pacific sectors, which drive opposite-signed changes in upward wave propagation from the troposphere to the stratosphere. Identical experiments conducted with Community Atmosphere Model, version 4, WACCM's low-top counterpart, show a weaker tropospheric response and a different stratospheric response compared to WACCM. An additional WACCM experiment in which the imposed ice loss is limited to August-November reveals that autumn ice loss weakens the stratospheric polar vortex in January, followed by a small but significant tropospheric response in late winter and early spring that resembles the negative phase of the North Atlantic Oscillation, with attendant surface climate impacts. © 2015 American Meteorological Society. 资助项目: 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/50901
Appears in Collections: 气候变化事实与影响
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, NOAA/Earth System Research Laboratory, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Sun L.,Deser C.,Tomas R.A.. Mechanisms of stratospheric and tropospheric circulation response to projected Arctic sea ice loss[J]. Journal of Climate,2015-01-01,28(19)