DOI: 10.1007/s00382-014-2089-5
Scopus记录号: 2-s2.0-84893828211
论文题名: Simulation of monsoon intraseasonal variability in NCEP CFSv2 and its role on systematic bias
作者: Goswami B.B. ; Deshpande M. ; Mukhopadhyay P. ; Saha S.K. ; Rao S.A. ; Murthugudde R. ; Goswami B.N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-09-10 起始页码: 2725
结束页码: 2745
语种: 英语
英文关键词: Convective heating tendency
; Coupling
; GCM
; MISO
英文摘要: We have evaluated the simulation of Indian summer monsoon and its intraseasonal oscillations in the National Centers for Environmental Prediction climate forecast system model version 2 (CFSv2). The dry bias over the Indian landmass in the mean monsoon rainfall is one of the major concerns. In spite of this dry bias, CFSv2 shows a reasonable northward propagation of convection at intraseasonal (30–60 day) time scale. In order to document and understand this dry bias over the Indian landmass in CFSv2 simulations, a two pronged investigation is carried out on the two major facets of Indian summer monsoon: one, the air–sea interactions and two, the large scale vertical heating structure in the model. Our analysis shows a possible bias in the co-evolution of convection and sea surface temperature in CFSv2 over the equatorial Indian Ocean. It is also found that the simulated large scale vertical heat source (Q1) and moisture sink (Q2) over the Indian region are biased relative to observational estimates. Finally, this study provides a possible explanation for the dry precipitation bias over the Indian landmass in the simulated mean monsoon on the basis of the biases associated with the simulated ocean–atmospheric processes and the vertical heating structure. This study also throws some light on the puzzle of CFSv2 exhibiting a reasonable northward propagation at the intraseasonal time scale (30–60 day) despite a drier monsoon over the Indian land mass. © 2014, Springer-Verlag Berlin Heidelberg. 资助项目: JPL, Jet Propulsion Laboratory
; MoES, Ministry of Earth Sciences
; NASA, National Aeronautics and Space Administration
; ONR, Office of Naval Research
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54435
Appears in Collections: 过去全球变化的重建
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作者单位: Indian Institute of Tropical Meteorology, Pune, India; University of Maryland, College Park, MD, United States
Recommended Citation:
Goswami B.B.,Deshpande M.,Mukhopadhyay P.,et al. Simulation of monsoon intraseasonal variability in NCEP CFSv2 and its role on systematic bias[J]. Climate Dynamics,2014-01-01,43(2017-09-10)