DOI: 10.1175/JCLI-D-17-0503.1
Scopus记录号: 2-s2.0-85047091436
论文题名: A Pan-African convection-permitting regional climate simulation with the met office unified model: CP4-Africa
作者: Stratton R.A. ; Senior C.A. ; Vosper S.B. ; Folwell S.S. ; Boutle I.A. ; Earnshaw P.D. ; Kendon E. ; Lock A.P. ; Malcolm A. ; Manners J. ; Morcrette C.J. ; Short C. ; Stirling A.J. ; Taylor C.M. ; Tucker S. ; Webster S. ; Wilkinson J.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 9 起始页码: 3485
结束页码: 3508
语种: 英语
英文关键词: Africa
; Atmosphere
; Climate models
; Convection
; Regional models
Scopus关键词: Earth atmosphere
; Heat convection
; Moisture control
; Parameterization
; Precipitation (meteorology)
; Surface waters
; Africa
; Convection parameterization
; Extreme precipitation
; Global atmospheric models
; Horizontal grid spacing
; Moisture conservation
; Regional climate simulation
; Regional model
; Climate models
英文摘要: A convection-permitting multiyear regional climate simulation using the Met Office Unified Model has been run for the first time on an Africa-wide domain. The model has been run as part of the Future Climate for Africa (FCFA) Improving Model Processes for African Climate (IMPALA) project, and its configuration, domain, and forcing data are described here in detail. The model [Pan-African Convection-Permitting Regional Climate Simulation with the Met Office UM (CP4-Africa)] uses a 4.5-km horizontal grid spacing at the equator and is run without a convection parameterization, nested within a global atmospheric model driven by observations at the sea surface, which does include a convection scheme. An additional regional simulation, with identical resolution and physical parameterizations to the global model, but with the domain, land surface, and aerosol climatologies of CP4-Africa, has been run to aid in the understanding of the differences between the CP4-Africa and global model, in particular to isolate the impact of the convection parameterization and resolution. The effect of enforcing moisture conservation in CP4-Africa is described and its impact on reducing extreme precipitation values is assessed. Preliminary results from the first five years of the CP4-Africa simulation show substantial improvements in JJA average rainfall compared to the parameterized convection models, with most notably a reduction in the persistent dry bias in West Africa, giving an indication of the benefits to be gained from running a convection-permitting simulation over the whole African continent. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111554
Appears in Collections: 气候减缓与适应
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作者单位: Met Office, Exeter, United Kingdom; Centre for Ecology and Hydrology, Wallingford, United Kingdom
Recommended Citation:
Stratton R.A.,Senior C.A.,Vosper S.B.,et al. A Pan-African convection-permitting regional climate simulation with the met office unified model: CP4-Africa[J]. Journal of Climate,2018-01-01,31(9)