DOI: 10.1007/s00382-013-1997-0
Scopus记录号: 2-s2.0-84899937903
论文题名: The sensitivity of the tropical circulation and Maritime Continent precipitation to climate model resolution
作者: Schiemann R. ; Demory M.-E. ; Mizielinski M.S. ; Roberts M.J. ; Shaffrey L.C. ; Strachan J. ; Vidale P.L.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-09-10 起始页码: 2455
结束页码: 2468
语种: 英语
英文关键词: Boundary conditions
; Climate model bias
; Coastal tiling
; GCM
; Maritime Continent
; Precipitation
; Resolution
; Walker circulation
英文摘要: The dependence of the annual mean tropical precipitation on horizontal resolution is investigated in the atmospheric version of the Hadley Centre General Environment Model. Reducing the grid spacing from about 350 km to about 110 km improves the precipitation distribution in most of the tropics. In particular, characteristic dry biases over South and Southeast Asia including the Maritime Continent as well as wet biases over the western tropical oceans are reduced. The annual-mean precipitation bias is reduced by about one third over the Maritime Continent and the neighbouring ocean basins associated with it via the Walker circulation. Sensitivity experiments show that much of the improvement with resolution in the Maritime Continent region is due to the specification of better resolved surface boundary conditions (land fraction, soil and vegetation parameters) at the higher resolution. It is shown that in particular the formulation of the coastal tiling scheme may cause resolution sensitivity of the mean simulated climate. The improvement in the tropical mean precipitation in this region is not primarily associated with the better representation of orography at the higher resolution, nor with changes in the eddy transport of moisture. Sizeable sensitivity to changes in the surface fields may be one of the reasons for the large variation of the mean tropical precipitation distribution seen across climate models. © 2013 The Author(s). 资助项目: NCAS, Natural Environment Research Council
; NERC, Natural Environment Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54346
Appears in Collections: 过去全球变化的重建
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作者单位: NCAS-Climate, Department of Meteorology, University of Reading, Earley Gate, PO Box 243, Reading, RG6 6BB, United Kingdom; Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, United Kingdom
Recommended Citation:
Schiemann R.,Demory M.-E.,Mizielinski M.S.,et al. The sensitivity of the tropical circulation and Maritime Continent precipitation to climate model resolution[J]. Climate Dynamics,2014-01-01,42(2017-09-10)