globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-012-1387-z
Scopus记录号: 2-s2.0-84874298386
论文题名:
Climate simulation over CORDEX Africa domain using the fifth-generation Canadian Regional Climate Model (CRCM5)
作者: Hernández-Díaz L.; Laprise R.; Sushama L.; Martynov A.; Winger K.; Dugas B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期:2017-05-06
起始页码: 1415
结束页码: 1433
语种: 英语
英文关键词: Africa ; CORDEX ; Regional Climate Modelling ; West African Monsoon
英文摘要: The new fifth-generation Regional Climate Model (CRCM5) was driven by ERA reanalyses for the period 1984-2008 over the African continent following the CORDEX experimental protocol. Overall the model succeeds in reproducing the main features of the geographical distribution and seasonal cycle of temperature and precipitation, the diurnal cycle of precipitation, and the West African Monsoon (WAM). Biases in surface temperature and precipitation are discussed in relation with some circulation defects noted in the simulation. In the African regions near the equator, the model successfully reproduces the double peak of rainfall due to the double passage of the tropical rainbelt, although it better simulates the magnitude and timing of the second peak of precipitation. CRCM5 captures the timing of the monsoon onset for the Sahel region but underestimates the magnitude of precipitation. The simulated diurnal cycle is quite well simulated for all of the regions, but is always somewhat in advance for the timing of rainfall peak. In boreal summer the CRCM5 simulation exhibits a weak cold bias over the Sahara and the maximum temperature is located too far south, resulting in a southward bias in the position of the Saharan Heat Low. The region of maximum ascent in the deep meridional circulation of the Hadley cell is well located in the CRCM5 simulation, but it is somewhat too narrow. The core of the African Easterly Jet is of the right strength and almost at the right height, but it is displayed slightly southward, as a consequence of the southward bias in the position of the Saharan Heat Low and the thermal wind relationship. These biases appear to be germane to the WAM rainfall band being narrower and not moving far enough northward, resulting in a dry bias in the Sahel. © 2012 The Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54996
Appears in Collections:过去全球变化的重建

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作者单位: Centre ESCER (Étude et la Simulation du Climat à l'Échelle Régionale), Département des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal (UQAM), C.P. 8888, Succ. Centre-ville, Montreal, QC, H3C 3P8, Canada; Canada Research Chair in Regional Climate Modelling, Centre ESCER (Etude et la Simulation du Climat a l'Echelle Reionale), Dept. des sciences de la Terre et de l'atmosphere, Université du Quebec a Montreal (UQAM), Montreal, QC, Canada; Centre ESCER (Étude et la Simulation du Climat à l'Échelle Régionale), Recherche en Prévision Numérique, Environment Canada, Montreal, QC, Canada

Recommended Citation:
Hernández-Díaz L.,Laprise R.,Sushama L.,et al. Climate simulation over CORDEX Africa domain using the fifth-generation Canadian Regional Climate Model (CRCM5)[J]. Climate Dynamics,2013-01-01,40(2017-05-06)
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