气候变化领域集成服务门户(CCPortal): Inter-comparison and evaluation of mixed-convection schemes in RegCM4 for Indian summer monsoon simulation

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DOI	10.1016/j.atmosres.2018.09.002
	Inter-comparison and evaluation of mixed-convection schemes in RegCM4 for Indian summer monsoon simulation
	Sinha P.; Maurya R.K.S.; Mohanty M.R.; Mohanty U.C.
发表日期	2019
ISSN	0169-8095
起始页码	239
结束页码	252
卷号	215
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.
英文关键词	Indian Summer Monsoon; Mixed-convection scheme; Regional climate model; Statistical methods
语种	英语
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
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162228
作者单位	School of Earth, Ocean and Climate Sciences (SEOCS), Indian Institute of Technology (IIT) Bhubaneswar, India
推荐引用方式 GB/T 7714	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],2019,215.
APA	Sinha P.,Maurya R.K.S.,Mohanty M.R.,&Mohanty U.C..(2019).Inter-comparison and evaluation of mixed-convection schemes in RegCM4 for Indian summer monsoon simulation.Atmospheric Research,215.
MLA	Sinha P.,et al."Inter-comparison and evaluation of mixed-convection schemes in RegCM4 for Indian summer monsoon simulation".Atmospheric Research 215(2019).