DOI: 10.1002/joc.5159
论文题名: Evaluation of the Regional Climate Model over the Loess Plateau of China
作者: Wang L. ; Cheung K.K.W. ; Tam C.-Y. ; Tai A.P.K. ; Li Y.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 1 起始页码: 35
结束页码: 54
语种: 英语
英文关键词: Loess Plateau
; model bias
; model evaluation
; regional climate model
; water and energy heat fluxes
Scopus关键词: Advection
; Atmospheric radiation
; Atmospheric temperature
; Budget control
; Heat flux
; Landforms
; Moisture
; Precipitation (meteorology)
; Reforestation
; Sediments
; Loess Plateau
; Model bias
; Model evaluation
; Regional climate modeling
; Water and energies
; Climate models
; air temperature
; climate modeling
; evaporation
; heat flux
; precipitation (climatology)
; reforestation
; regional climate
; semiarid region
; spatiotemporal analysis
; topographic effect
; water flow
; China
; Loess Plateau
英文摘要: This paper presents an evaluation study of the Regional Climate Model version 4.3 (RegCM4.3) over the Loess Plateau in northern China, which is a semi-arid region characterized by complex topography. During recent years, a series of reforestation programmes have been implemented across the region that might influence the local climate in complex ways. To better understand the local climate, the RegCM4.3 was applied to simulate the present-day conditions over the Loess Plateau. The simulation was carried out from 1990 to 2009 at the 50-km horizontal resolution, with lateral boundary conditions taken from the ECMWF-Interim reanalysis. A series of climate variables and processes were evaluated during the winter and summer seasons, such as 2-m air temperature, precipitation, wind circulation, surface energy balance, full moisture budget, and cloud radiative forcing (CRF). The possible origins of the simulation bias and the physical linkages with other model processes were examined. In general, RegCM4.3 is able to reproduce both the spatial and temporal features of the regional climate over the Loess Plateau. However, there are still biases in some meteorological variables including precipitation and 2-m air temperature. In particular, the model tends to produce cold biases during winter and underestimate precipitation during summer. Further analyses indicates that the cold biases in winter may have resulted from the deficiency of the downward longwave radiation fluxes, excessive ground heat fluxes, and negative temperature advection by the seasonal mean circulation. These processes are primarily triggered by deficiencies in CRF and excessive northwesterlies over the plateau. The underestimated precipitation during summer is associated with a weak southerly monsoon in the model. A full moisture budget analysis reveals that the dry bias in this region can be mainly attributed to model deficiency in moisture advection and convergence, and to a lesser extent to that in surface evaporation. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117175
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Sciences, Macquarie University, Sydney, Australia; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Hong Kong; Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong; Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters, School of Geography and Remote Sensing, Nanjing University of Information Science and Technology, China
Recommended Citation:
Wang L.,Cheung K.K.W.,Tam C.-Y.,et al. Evaluation of the Regional Climate Model over the Loess Plateau of China[J]. International Journal of Climatology,2018-01-01,38(1)