DOI: 10.1007/s00382-011-1055-8
Scopus记录号: 2-s2.0-84856305039
论文题名: Uncertainties in simulating regional climate of Southern Africa: Sensitivity to physical parameterizations using WRF
作者: Crétat J. ; Pohl B. ; Richard Y. ; Drobinski P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期: 2017-03-04 起始页码: 613
结束页码: 634
语种: 英语
英文关键词: Physical parameterization
; Southern Africa
; Summer rainfall
; WRF regional climate model
英文摘要: This study aims at quantifying seasonal biases of regional climate model outputs during southern African summer, against a dense in situ measurement network (daily rain-gauge and surface air temperature records, and 12 h UTC radiosondes), and uncertainties associated with some physical parameterizations. Using the non-hydrostatic Advanced Research Weather Forecast (WRF) laterally forced by ERA40 reanalysis, twenty-seven experiments configured with three schemes of cumulus (CU), planetary boundary layer (PBL) and microphysics (MP), are performed at 35 km horizontal resolution during the core of a summer rainy season (December 1993 to February 1994 season) representative of the South African rainfall climatology. WRF simulates accurately seasonal large-scale rainfall patterns, as well as seasonal gradients of South African rainfall and 2-m temperature, and seasonal vertical profiles of the air temperature and humidity. However seasonal biases fluctuate strongly from an experiment to another, denoting considerable uncertainties generated by the physical package. Rainfall amounts are the most sensitive parameter to the tested schemes. Their geography, intensity, and intraseasonal characteristics are predominantly sensitive to CU schemes, and much less to PBL and MP schemes. Some CU-PBL combinations produce additive effects, which can dramatically either reduce or increase biases. Satisfactory configurations are found for South African climate, which would not have been possible without testing numerous physical parameterizations. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55370
Appears in Collections: 过去全球变化的重建
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作者单位: Centre de Recherches de Climatologie, CNRS UMR 5210, Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France; LMD, Institut Pierre Simon Laplace, Ecole Polytechnique, Palaiseau, France
Recommended Citation:
Crétat J.,Pohl B.,Richard Y.,et al. Uncertainties in simulating regional climate of Southern Africa: Sensitivity to physical parameterizations using WRF[J]. Climate Dynamics,2012-01-01,38(2017-03-04)