DOI: 10.1007/s00382-016-3271-8
Scopus记录号: 2-s2.0-84979220632
论文题名: Impact of increased horizontal resolution in coupled and atmosphere-only models of the HadGEM1 family upon the climate patterns of South America
作者: de Souza Custodio M. ; da Rocha R.P. ; Ambrizzi T. ; Vidale P.L. ; Demory M.-E.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-09-10 起始页码: 3341
结束页码: 3364
语种: 英语
英文关键词: Atmospheric
; Coupled
; Resolution
; South America
英文摘要: This study investigates the impact of increased horizontal resolution in coupled and atmosphere-only global climate models on the simulation of climate patterns in South America (SA). We analyze simulations of the HadGEM1 model family with three different horizontal resolutions in the atmosphere—N96 (~135 km at 50°N), N144 (~90 km) and N216 (~60 km)—and two different resolutions in the ocean—1° and 1/3°. In general, the coupled simulation with the highest resolution (60 km in the atmosphere and 1/3° in the ocean) has smaller systematic errors in seasonal mean precipitation, temperature and circulation over SA than the atmosphere-only model at all resolutions. The models, both coupled and atmosphere-only, properly simulate spatial patterns of the seasonal shift of the Intertropical Convergence Zone (ITCZ), the formation and positioning of the South Atlantic Convergence Zone (SACZ), and the subtropical Atlantic and Pacific highs. However, the models overestimate rainfall, especially in the ITCZ and over the western border of high-elevation areas such as southern Chile. The coupling, combined with higher resolution, result in a more realistic spatial pattern of rain, particularly over the Atlantic ITCZ and the continental branch of the SACZ. All models correctly simulate the phase and amplitude of the annual cycle of precipitation and air temperature over most of South America. The overall results show that despite some problems, increasing the resolution in the HadGEM1 model family results in a more realistic representation of climate patterns over South America and the adjacent oceans. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53238
Appears in Collections: 过去全球变化的重建
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作者单位: Departamento de Física, Universidade Estadual Paulista and Centro de Meteorologia de Bauru (IPMet), Bauru, São Paulo, Brazil; Departamento de Ciências Atmosféricas, Universidade de São Paulo, São Paulo, Brazil; Department of Meteorology, National Centre for Atmospheric Science, University of Reading, Reading, United Kingdom
Recommended Citation:
de Souza Custodio M.,da Rocha R.P.,Ambrizzi T.,et al. Impact of increased horizontal resolution in coupled and atmosphere-only models of the HadGEM1 family upon the climate patterns of South America[J]. Climate Dynamics,2017-01-01,48(2017-09-10)