DOI: 10.3354/cr01386
Scopus记录号: 2-s2.0-85008646040
论文题名: Sensitivity of Southeast Asia rainfall simulations to cumulus and air-sea flux parameterizations in RegCM4
作者: Juneng L. ; Tangang F. ; Chung J.X. ; Ngai S.T. ; Tay T.W. ; Narisma G. ; Cruz F. ; Phan-Van T. ; Ngo-Duc T. ; Santisirisomboon J. ; Singhruck P. ; Gunawan D. ; Aldrian E.
刊名: Climate Research
ISSN: 0936577X
出版年: 2016
卷: 69, 期: 1 起始页码: 59
结束页码: 77
语种: 英语
英文关键词: Rainfall
; RegCM
; Regional climate modelling
; Simulation validation
; Southeast Asia
Scopus关键词: air-sea interaction
; annual variation
; atmospheric forcing
; climate modeling
; flux measurement
; model validation
; numerical method
; rainfall
; sensitivity analysis
; surface temperature
; temperature anomaly
; Indochina
英文摘要: We investigated the performance of RegCM4 in simulating rainfall over Southeast Asia with different combinations of deep-convection and air-sea flux parameterization schemes. Four different gridded rainfall datasets were used for the model assessment. In general, the simulations produced dry biases over the equatorial region and slightly wet biases over mainland Indo-China, except those experiments with the MIT Emanuel cumulus schemes, in which large positive rainfall biases were simulated. However, simulations with the MIT schemes were generally better at reproducing annual rainfall variations. The simulations were not sensitive to the treatment of air-sea fluxes. While the simulations generally produced the rainfall climatology well, all simulations showed stronger inter-annual variability compared to observations. Nevertheless, the time evolution of the inter-annual variations was well reproduced, particularly over the eastern Maritime Continent. Over mainland Southeast Asia, all simulations produced unrealistic rainfall anomaly responses to surface temperature. The lack of summer air-sea interactions in the model resulted in enhanced oceanic forcing over the regions, leading to positive rainfall anomalies during years with warm ocean temperature anomalies. This shortcoming in turn caused much stronger atmospheric forcing on the land surface processes compared to that of the observation. A robust score-ranking system was designed to rank the simulations according to their performance in reproducing different aspects of rainfall characteristics. The results suggest that the simulation with the MIT Emanuel convective scheme and the BATS1e air-sea flux scheme performs better overall compared to the rest of the simulations. © Inter-Research 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116383
Appears in Collections: 气候减缓与适应
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Recommended Citation:
Juneng L.,Tangang F.,Chung J.X.,et al. Sensitivity of Southeast Asia rainfall simulations to cumulus and air-sea flux parameterizations in RegCM4[J]. Climate Research,2016-01-01,69(1)