DOI: 10.1007/s00382-017-3827-2
Scopus记录号: 2-s2.0-85026442844
论文题名: Performance evaluation of regional climate model to simulate sub-seasonal variability of Indian Summer Monsoon
作者: Umakanth U. ; Kesarkar A.P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-09-10 起始页码: 3595
结束页码: 3612
语种: 英语
英文关键词: Active and break conditions
; Intraseasonal variability of the monsoon
; Regional climate model
; Seasonal mean monsoon
; Slab ocean model
Scopus关键词: climate modeling
; computer simulation
; experimental study
; monsoon
; performance assessment
; precipitation (climatology)
; regional climate
; sea surface temperature
; seasonal variation
; summer
; vertical profile
; Bay of Bengal
; India
; Indian Ocean
英文摘要: The study aims to evaluate the regional climate model (RegCM) over South Asian (SA) CORDEX domain to represent seasonal and sub-seasonal variability of Indian Summer Monsoon (ISM). The model’s ability is evaluated by conducting two sets of experiments using one-tier approach of coupling the RegCM with a simple mixed-layer slab ocean model (SOM) and the two-tier approach of prescribing sea surface temperature (SST) to RegCM. Two model experiments are initialized at 1st January 2000 for a period of 13 year continuous simulation at a spatial resolution of 50 km. It is found that, one-tier approach realistically represents the spatial distribution of precipitation with significant improvement noticed over central India (CI) and head Bay of Bengal (BoB) regions. In addition, it also fairly reproduced the observed mean meridional circulation response to the diabatic heating produced during ISM. Most importantly, in one-tier approach the model could able to represent the observed SST and precipitation (P) relationship with significant improvement in correlation and model response time. An important result is the representation of northwest-southeast tilt of precipitation anomalies during active/break phase of monsoon. Additionally, the lagged response of vertical profiles of specific humidity, omega, vorticity and divergence over CI with respect to peak rainfall anomaly (active phase) are relatively better represented in one-tier approach. In brief, coupling improves the performance of RegCM in simulating the space–time characteristics of monsoon ISO mode. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109336
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: National Atmospheric Research Laboratory, Gadanki, Andhra Pradesh 517112, India; Indian Institute of Tropical Meteorology, Pune, Maharastra 411008, India
Recommended Citation:
Umakanth U.,Kesarkar A.P.. Performance evaluation of regional climate model to simulate sub-seasonal variability of Indian Summer Monsoon[J]. Climate Dynamics,2018-01-01,50(2018-09-10)