globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-012-1405-1
Scopus记录号: 2-s2.0-84875756695
论文题名:
A regional response in mean westerly circulation and rainfall to projected climate warming over Tasmania, Australia
作者: Grose M.R.; Corney S.P.; Katzfey J.J.; Bennett J.C.; Holz G.K.; White C.J.; Bindoff N.L.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期:2017-07-08
起始页码: 2035
结束页码: 2048
语种: 英语
英文关键词: Climate change ; Mean circulation ; Rainfall ; Regional climate model ; Southern hemisphere westerlies ; Surface warming
英文摘要: Coupled ocean-atmosphere general circulation models (GCMs) lack sufficient resolution to model the regional detail of changes to mean circulation and rainfall with projected climate warming. In this paper, changes in mean circulation and rainfall in GCMs are compared to those in a variable resolution regional climate model, the Conformal Cubic Atmospheric Model (CCAM), under a high greenhouse gas emissions scenario. The study site is Tasmania, Australia, which is positioned within the mid-latitude westerlies of the southern hemisphere. CCAM projects a different response in mean sea level pressure and mid-latitude westerly circulation to climate warming to the GCMs used as input, and shows greater regional detail of the boundaries between regions of increasing and decreasing rainfall. Changes in mean circulation dominate the mean rainfall response in western Tasmania, whereas changes to rainfall in the East Coast are less related to mean circulation changes. CCAM projects an amplification of the dominant westerly circulation over Tasmania and this amplifies the seasonal cycle of wet winters and dry summers in the west. There is a larger change in the strength than in the incidence of westerly circulation and rainfall events. We propose the regional climate model displays a more sensitive atmospheric response to the different rates of warming of land and sea than the GCMs as input. The regional variation in these results highlight the need for dynamical downscaling of coupled general circulation models to finely resolve the influence of mean circulation and boundaries between regions of projected increases and decreases in rainfall. © 2012 Springer-Verlag.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54987
Appears in Collections:过去全球变化的重建

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作者单位: Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC), University of Tasmania, Private Bag 80, Hobart, TAS 7000, Australia; Centre for Australian Weather and Climate Research (CAWCR), CSIRO Marine and Atmospheric Research, Aspendale, VIC, Australia; Institute of Marine and Antarctic Studies (IMAS), University of Tasmania, Private Bag 129, Hobart, TAS 7001, Australia; CSIRO Land and Water, Graham Road, Highett Melbourne, VIC 3190, Australia; Centre for Australian Weather and Climate Research (CAWCR), Bureau of Meteorology, c/o CSIRO Marine and Atmospheric Research, Castray Esplanade, Hobart, TAS 7000, Australia; Centre for Australian Weather and Climate Research (CAWCR), CSIRO Marine and Atmospheric Research, Castray Esplanade, Hobart, TAS 7000, Australia

Recommended Citation:
Grose M.R.,Corney S.P.,Katzfey J.J.,et al. A regional response in mean westerly circulation and rainfall to projected climate warming over Tasmania, Australia[J]. Climate Dynamics,2013-01-01,40(2017-07-08)
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