DOI: 10.1175/JCLI-D-13-00188.1
Scopus记录号: 2-s2.0-84896077818
论文题名: Improving the simulation of the West African monsoon using the MIT regional climate model
作者: Im E.-S. ; Gianotti R.L. ; Eltahir E.A.B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 6 起始页码: 2209
结束页码: 2229
语种: 英语
Scopus关键词: Climatology
; Clouds
; Energy balance
; Interfacial energy
; Rain
; Solar radiation
; Surface measurement
; Convective parameterization
; Integrated biosphere simulators
; Land surface modeling
; Massachusetts Institute of Technology
; Model evaluation/performance
; Rainfall characteristics
; Regional climate modeling
; Regional model
; Climate models
; atmospheric circulation
; boundary layer
; climate modeling
; climatology
; cloud cover
; computer simulation
; convective cloud
; energy balance
; land surface
; monsoon
; rainfall
; regional climate
; surface energy
; West Africa
英文摘要: This paper presents an evaluation of the performance of the Massachusetts Institute of Technology (MIT) regional climate model (MRCM) in simulating the West African monsoon. The MRCM is built on the Regional Climate Model, version 3 (RegCM3), but with several improvements, including coupling of Integrated Biosphere Simulator (IBIS) land surface scheme, a new surface albedo assignment method, new convective cloud and convective rainfall autoconversion schemes, and a modified scheme for simulating boundary layer height and boundary layer clouds. To investigate the impact of these more physically realistic representations when incorporated into MRCM, a series of experiments were carried out implementing two land surface schemes [IBIS with a new albedo assignment, and the Biosphere-Atmosphere Transfer Scheme (BATS)] and two convection schemes (Grell with the Fritsch-Chappell closure, and Emanuel in both the default form and modified with the new convective cloud cover and a rainfall autoconversion scheme). The analysis primarily focuses on comparing the rainfall characteristics, surface energy balance, and large-scale circulations against various observations. This work documents significant sensitivity in simulation of the West African monsoon to the choices of the land surface and convection schemes. Despite several deficiencies, the simulation with the combination of IBIS and the modified Emanuel scheme with the new convective cloud cover and a rainfall autoconversion scheme shows the best performance with respect to the spatial distribution of rainfall and the dynamics of the monsoon. The coupling of IBIS leads to representations of the surface energy balance and partitioning that show better agreement with observations compared to BATS. The IBIS simulations also reasonably reproduce the dynamical structures of the West African monsoon circulation. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51336
Appears in Collections: 气候变化事实与影响
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作者单位: Singapore-MIT Alliance for Research and Technology, Center for Environmental Sensing and Modeling, Singapore; Ralph M. Parsons Laboratory, Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Im E.-S.,Gianotti R.L.,Eltahir E.A.B.. Improving the simulation of the West African monsoon using the MIT regional climate model[J]. Journal of Climate,2014-01-01,27(6)