DOI: 10.1002/joc.5945
Scopus记录号: 2-s2.0-85061429674
论文题名: How good is regional climate model version 4 in simulating the monsoon onset over Kerala?
作者: Pattnayak K.C. ; Panda S.K. ; Saraswat V. ; Dash S.K.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
语种: 英语
英文关键词: equitable threat score
; ERA-interim
; moisture Inflow
; monsoon onset over Kerala
; RegCM4
Scopus关键词: Atmospheric thermodynamics
; Moisture
; Rain
; Weather forecasting
; Correlation coefficient
; Equitable threat score
; Era interims
; European centre for medium-range weather forecasts
; Monsoon onset
; RegCM4
; Regional climate modeling
; Summer monsoon rainfall
; Climate models
英文摘要: This study assesses the performance of regional climate model version 4 (RegCM4) in simulating the monsoon onset over Kerala (MOK). It also examines any possible relationship between the onset dates with the summer monsoon rainfall over India as whole as well as each grid points of the India land points and also the moisture inflow into Indian subcontinent. A 30-year long simulation starting from 1979 till 2008 was carried out with the lateral boundary forcings provided by European Centre for Medium Range Weather Forecasts Reanalysis (ERA-interim) at 25 km horizontal resolution. The simulated climatological MOK date is found to be 28th May, while as per the India Meteorological Department, climatological normal onset date is 1st June. The model has performed well in simulating the inter-annual variation of MOK during the study period. The correlation coefficient between model simulated and observed MOK is 0.83 significant at 95% confidence level. In both model and observations, the MOK is weakly correlated with All India Summer Monsoon Rainfall. Again, the model skill was examined through equitable threat score (ETS). The ETS score is high for normal (0.48) and delayed (0.42) onset years, while the score is very low in early onset years. The spatial patterns of rainfall over central India are very similar in early and normal onset years. The model has performed well in reproducing the moisture inflow in to the Indian subcontinent from all the directions in most of the years, but there is no one-to-one relation between different categories of MOK years with total rainfall and net moisture inflow. Based on this study, it is found that RegCM4 reproduces different aspects of MOK reasonably well. © 2018 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116630
Appears in Collections: 全球变化的国际研究计划
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作者单位: Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, India; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Department of Atmospheric Science, Central University of Rajasthan, Ajmer, Rajasthan, India
Recommended Citation:
Pattnayak K.C.,Panda S.K.,Saraswat V.,et al. How good is regional climate model version 4 in simulating the monsoon onset over Kerala?[J]. International Journal of Climatology,2019-01-01