DOI: 10.1002/joc.5851
Scopus记录号: 2-s2.0-85053049500
论文题名: Simulation of extreme Indian summer monsoon years in Coupled Model Intercomparison Project Phase 5 models: Role of cloud processes
作者: Chaudhari H.S. ; Hazra A. ; Pokhrel S. ; Saha S.K. ; Talluri S.S.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 2 起始页码: 901
结束页码: 920
语种: 英语
英文关键词: cloud hydrometeors
; CMIP5 models
; Indian summer monsoon
Scopus关键词: Atmospheric thermodynamics
; Rain
; Cloud hydrometeors
; Coupled climate model
; Coupled Model Intercomparison Project
; Indian summer monsoon
; Large-scale circulation
; Rainfall characteristics
; Thermodynamical process
; Tropospheric temperature
; Climate models
; atmospheric dynamics
; CMIP
; extreme event
; hydrometeorology
; monsoon
; parameterization
; precipitable water
; rainfall
; summer
; thermodynamics
; troposphere
; India
英文摘要: The Indian summer monsoon (ISM) is a climate coupled system where cloud processes play a significant role in modulating the thermodynamics and dynamics of the atmosphere. The realistic representation of cloud by coupled model becomes indispensable for the simulation of the rainfall variability dictating the extreme ISM rainfall years. This study pinpoints the importance of correct representation of cloud processes and different types of rainfall in coupled climate model for the realistic simulation of monsoon extreme rainfall years. The study has used historical runs of Coupled Model Intercomparison Project Phase 5 (CMIP5) models. It provided best opportunity to investigate the ISM rainfall characteristics in case of anomalous monsoon and associated physical processes responsible for the modulation of large-scale circulation. The study has identified the mechanism behind the better simulation of anomalous years. Relatively more cloud condensate at upper level and middle level is present in excess monsoon years. Pertaining to phase changes and thermodynamical processes, there will be relatively more tropospheric temperature gradient and it will be conducive for strong monsoon. Proper representation of convective and stratiform rain is seen during extreme years. Precipitable water is also relatively more during excess monsoon years. As a result, total rainfall also enhances and it leads to excess monsoon. In contrast, during deficient monsoon relatively less cloud condensate at upper level and middle level is present. Therefore, the correct representation of cloud condensate vertical profile and stratiform/convective rain are crucial for the better simulation of excess and deficient monsoon, which may further improve the variability of ISM in climate model. This study connotes the urgent need of the improvement of cloud parameterization in coupled climate models for the betterment of monsoon variability and realistic representation of deficient/excess monsoon rainfall patterns over Indian subcontinent. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116581
Appears in Collections: 全球变化的国际研究计划
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作者单位: Indian Institute of Tropical Meteorology, Pune, India
Recommended Citation:
Chaudhari H.S.,Hazra A.,Pokhrel S.,et al. Simulation of extreme Indian summer monsoon years in Coupled Model Intercomparison Project Phase 5 models: Role of cloud processes[J]. International Journal of Climatology,2019-01-01,39(2)