DOI: 10.1016/j.atmosres.2018.09.002
Scopus记录号: 2-s2.0-85053780923
论文题名: Inter-comparison and evaluation of mixed-convection schemes in RegCM4 for Indian summer monsoon simulation
作者: Sinha P. ; Maurya R.K.S. ; Mohanty M.R. ; Mohanty U.C.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 215 起始页码: 239
结束页码: 252
语种: 英语
英文关键词: Indian Summer Monsoon
; Mixed-convection scheme
; Regional climate model
; Statistical methods
Scopus关键词: Atmospheric thermodynamics
; Clouds
; Mixed convection
; Precipitation (meteorology)
; Statistical methods
; Storms
; Convective instabilities
; Department of Energy
; Indian summer monsoon
; Initial and boundary conditions
; National centers for environmental predictions
; Regional climate modeling
; Seasonal mean precipitation
; Surface air temperatures
; Climate models
; atmospheric convection
; climate modeling
; cumulus
; monsoon
; precipitation (climatology)
; regional climate
; statistical analysis
; summer
英文摘要: The present study evaluates the performances of mixed-convection schemes (MCSs) in which different cumulus schemes are activated over the land and ocean separately to simulating the Indian Summer Monsoon (ISM). The regional climate model RegCM4.4 is used and the initial and boundary conditions are derived from the National Centers for Environmental Prediction (NCEP) and Department of Energy (DOE) reanalysis version 2 (NCEP-R2). The NCEP-R2 and the Indian Meteorological Department (IMD) precipitation analysis at 0.25° × 0.25° are used to evaluate the model simulated results. The four cumulus schemes Grell, MIT-Emanuel, Tiedtke, and Kain and Fritsch have been used to setting ten different combinations of MCSs. The MCSs having Tiedtke/Emanuel scheme over the land and the Grell scheme over the ocean (L:Ti_O:Gr; L:Em_O:Gr) are found qualitatively and quantitatively better to simulating the semi-permanent characteristics of the ISM. These MCSs are effectual in predicting seasonal mean precipitation intensity and distribution during the ISM and closer to IMD precipitation analysis than any other MCSs. It is found that the MCS having Grell scheme over the land and ocean, spatial gradient of precipitation is reasonably well when compared to IMD precipitation analysis. The representation of precipitation over the central India is poor in all the MCSs; this is probably due to increased cloud cover in RegCM4 which in turn, leads to reducing surface air temperature over land and thus reduce convective instability in the model simulations. The present study proposes a statistically based screening method to identify the useful MCSs that have reasonable skills. The best performing MCSs examined for normal and deficit monsoon years are used to simulate 15 consecutive monsoon seasons (1982–1996). Simulations of several monsoon years confirm that the two MCSs namely L:Ti_O:Gr and L:Em_O:Gr are suitable to simulate the ISM. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109049
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Earth, Ocean and Climate Sciences (SEOCS), Indian Institute of Technology (IIT) Bhubaneswar, India
Recommended Citation:
Sinha P.,Maurya R.K.S.,Mohanty M.R.,et al. Inter-comparison and evaluation of mixed-convection schemes in RegCM4 for Indian summer monsoon simulation[J]. Atmospheric Research,2019-01-01,215