DOI: 10.1175/JCLI-D-11-00284.1
Scopus记录号: 2-s2.0-84856956123
论文题名: Atmospheric circulation response to an instantaneous doubling of carbon dioxide. Part I: Model experiments and transient thermal response in the troposphere
作者: Wu Y. ; Seager R. ; Ting M. ; Naik N. ; Shaw T.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 8 起始页码: 2862
结束页码: 2879
语种: 英语
Scopus关键词: Atmospheric circulation
; Dynamical mechanisms
; Eddies
; Eddy momentum flux
; Extratropical
; General circulation
; General circulation model
; Jet streams
; Large-scale motions
; Midlatitudes
; Model experiments
; National center for atmospheric researches
; Quasi equilibrium
; Slab ocean models
; Step-by-step
; Thermal structure
; Transient thermal response
; Upper troposphere
; Atmospherics
; Carbon dioxide
; Climatology
; Dynamics
; Global warming
; Momentum
; Troposphere
; atmospheric circulation
; carbon dioxide
; eddy
; general circulation model
; jet stream
; troposphere
英文摘要: This study aims to understand the dynamical mechanisms driving the changes in the general circulation of the atmosphere due to increased carbon dioxide (CO 2) by looking into the transient step-by-step adjustment of the circulation. The transient atmospheric adjustment is examined using the National Center for Atmospheric Research Community Atmosphere Model, version 3, coupled to a slab ocean model, and the CO 2 concentration in the atmosphere is uniformly and instantaneously doubled. The thermal structure and circulation response is well established after one year of integration, with the magnitudes gradually increasing afterward toward quasi equilibrium. Tropical upper-tropospheric warming occurs in the first month. The expansion of the warming in the mid- and upper troposphere to the subtropics occurs later and is found to be primarily dynamically driven due to the intensification of transient eddy momentum flux convergence and resulting anomalous descending motion in this region. The poleward displacement of the midlatitude tropospheric jet streams occurs together with the change in eddy momentum flux convergence, but only after the intensification of the subpolar westerlies in the stratosphere. The results demonstrate the importance of the tropospheric eddies in setting up the extratropical tropospheric response to global warming. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52454
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Wu Y.,Seager R.,Ting M.,et al. Atmospheric circulation response to an instantaneous doubling of carbon dioxide. Part I: Model experiments and transient thermal response in the troposphere[J]. Journal of Climate,2012-01-01,25(8)