DOI: 10.1007/s00382-017-3792-9
Scopus记录号: 2-s2.0-85025081206
论文题名: Assessment of two versions of regional climate model in simulating the Indian Summer Monsoon over South Asia CORDEX domain
作者: Pattnayak K.C. ; Panda S.K. ; Saraswat V. ; Dash S.K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-07-08 起始页码: 3049
结束页码: 3061
语种: 英语
英文关键词: CORDEX
; Indian summer monsoon
; Moisture flux
; Rainfall homogenous zones
; RegCM4.2
; RegCM4.3
; Surface net downward shortwave flux
英文摘要: This study assess the performance of two versions of Regional Climate Model (RegCM) in simulating the Indian summer monsoon over South Asia for the period 1998 to 2003 with an aim of conducting future climate change simulations. Two sets of experiments were carried out with two different versions of RegCM (viz. RegCM4.2 and RegCM4.3) with the lateral boundary forcings provided from European Center for Medium Range Weather Forecast Reanalysis (ERA-interim) at 50 km horizontal resolution. The major updates in RegCM4.3 in comparison to the older version RegCM4.2 are the inclusion of measured solar irradiance in place of hardcoded solar constant and additional layers in the stratosphere. The analysis shows that the Indian summer monsoon rainfall, moisture flux and surface net downward shortwave flux are better represented in RegCM4.3 than that in the RegCM4.2 simulations. Excessive moisture flux in the RegCM4.2 simulation over the northern Arabian Sea and Peninsular India resulted in an overestimation of rainfall over the Western Ghats, Peninsular region as a result of which the all India rainfall has been overestimated. RegCM4.3 has performed well over India as a whole as well as its four rainfall homogenous zones in reproducing the mean monsoon rainfall and inter-annual variation of rainfall. Further, the monsoon onset, low-level Somali Jet and the upper level tropical easterly jet are better represented in the RegCM4.3 than RegCM4.2. Thus, RegCM4.3 has performed better in simulating the mean summer monsoon circulation over the South Asia. Hence, RegCM4.3 may be used to study the future climate change over the South Asia. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109385
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: Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India; School of Geography, University of Leeds, Leeds, LS2 9JT, United Kingdom; Department of Atmospheric Science, Central University of Rajasthan, NH-8, Bandar Sindri, Rajasthan, India
Recommended Citation:
Pattnayak K.C.,Panda S.K.,Saraswat V.,et al. Assessment of two versions of regional climate model in simulating the Indian Summer Monsoon over South Asia CORDEX domain[J]. Climate Dynamics,2018-01-01,50(2018-07-08)