气候变化领域集成服务门户(CCPortal): Long-term simulation of daily rainfall across India: Performance of cumulus convection schemes in regional climate model during southwest and northeast monsoon

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DOI	10.1016/j.atmosres.2021.105675
	Long-term simulation of daily rainfall across India: Performance of cumulus convection schemes in regional climate model during southwest and northeast monsoon
	Dutta R.; Sunanda N.; Patra A.; Maity R.
发表日期	2021
ISSN	0169-8095
卷号	259
英文摘要	The performance of Cumulus Convection Schemes (CCSs) in Regional Climate Model (RCM) is investigated for the long-term (34 years) simulation of daily rainfall over different Homogeneous Monsoon Regions (HMRs) of India. Characteristics of both southwest monsoon (aka summer monsoon) and northeast monsoon (aka winter monsoon or return monsoon) are analysed while assessing the performance. Indian monsoon is largely affected by climate change and studies demand a long-term (climatological scale) simulation and analysis. Furthermore, the vast study area consists of wide variation of topography and climatology that cause variation in best performing CCS across the HMRs. Month-wise and season-wise performances of different CCSs, namely Grell, and its combinations with Emmanuel as mixed schemes, such as Grell over Ocean and Emmanuel over Land (GOEL), and Grell over Land and Emmanuel over Ocean (GLEO) are assessed by using these schemes in the Regional Climate Model Version 4.4 (RegCM4.4) over a span of 34 years (1982 to 2015). The spatio-temporal variation of bias, investigated using the observed and simulated rainfall, shows more realistic performance for the peak monsoon months and positive bias during onset and retreating monsoon. Additionally, the spatio-temporal variation over the HMRs is investigated and the best possible CCS or a combination of CCSs is recommended. The better ability of mixed schemes in simulating the summer monsoon is noticed, particularly late monsoon, as compared to the early monsoon. Furthermore, GOEL performs best as compared to others to capture the spatial variation including peninsular India. The spatial distribution of observed rainfall during return monsoon is also well captured by the mixed schemes. However, GLEO scheme is found to be the best during return monsoon. © 2021 Elsevier B.V.
英文关键词	Cumulus convective schemes; Homogeneous monsoon regions; long-term simulation; Northeast monsoon; Regional climate model version 4.4 (RegCM4.4); Southwest monsoon
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/236706
作者单位	Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India; Centre for Oceans, Rivers, Atmosphere and Land Sciences, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India; School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea
推荐引用方式 GB/T 7714	Dutta R.,Sunanda N.,Patra A.,et al. Long-term simulation of daily rainfall across India: Performance of cumulus convection schemes in regional climate model during southwest and northeast monsoon[J],2021,259.
APA	Dutta R.,Sunanda N.,Patra A.,&Maity R..(2021).Long-term simulation of daily rainfall across India: Performance of cumulus convection schemes in regional climate model during southwest and northeast monsoon.Atmospheric Research,259.
MLA	Dutta R.,et al."Long-term simulation of daily rainfall across India: Performance of cumulus convection schemes in regional climate model during southwest and northeast monsoon".Atmospheric Research 259(2021).