气候变化领域集成服务门户(CCPortal): Sensitivity of diurnal cycle of simulated rainfall to cumulus parameterization during Indian summer monsoon seasons

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DOI	10.1007/s00382-019-04716-1
	Sensitivity of diurnal cycle of simulated rainfall to cumulus parameterization during Indian summer monsoon seasons
	Bhate J.; Kesarkar A.
发表日期	2019
ISSN	0930-7575
起始页码	3431
结束页码	3444
卷号	53 期号:2020-05-06
英文摘要	The sensitivity of simulation of the diurnal cycle (DC) to cumulus parameterisation is studied by using nine combinations (3 over Ocean × 3 over land) of cumulus schemes viz. Tiedtke, Emanuel, and Grell schemes for years 2008–2012 in the regional climate model RegCM4.4. The harmonic analysis is used to analyze the DC of rainfall simulated by the nine combinations of CPSs. It is seen that Emanual scheme predicts the spatial distribution of amplitude of the first harmonic and the variance of the diurnal cycle more appropriately compared to other CPSs. However, all schemes advanced the phase of the DC of rainfall by 3–6 h which is the result of the development of early convection in the model. The analysis of the development of rapid convection in the model suggests that sensible heat flux and vertically integrated moisture flux convergence peaks 3 to 6 h earlier compared to the phase of DC of rainfall estimated from TRMM rainfall. The early development of convection in the model may result in the inappropriate representation of condensation and evaporation cycle and hence DC of rainfall. The study emphasize that improvement in the phase of triggering of convection by cumulus parameterization schemes is essential to improve DC rainfall simulated by regional climate models. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Diurnal variation of convection and rainfall; Harmonic analysis; Moisture flux convergence; Regional climate; Sensible heat flux
语种	英语
scopus关键词	atmospheric convection; climate modeling; cumulus; diurnal variation; harmonic analysis; moisture flux; monsoon; parameterization; rainfall; regional climate; sensible heat flux; sensitivity analysis; India
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146017
作者单位	Department of Space, National Atmospheric Research Laboratory, Government of India, Gadanki, Andhra Pradesh 517112, India
推荐引用方式 GB/T 7714	Bhate J.,Kesarkar A.. Sensitivity of diurnal cycle of simulated rainfall to cumulus parameterization during Indian summer monsoon seasons[J],2019,53(2020-05-06).
APA	Bhate J.,&Kesarkar A..(2019).Sensitivity of diurnal cycle of simulated rainfall to cumulus parameterization during Indian summer monsoon seasons.Climate Dynamics,53(2020-05-06).
MLA	Bhate J.,et al."Sensitivity of diurnal cycle of simulated rainfall to cumulus parameterization during Indian summer monsoon seasons".Climate Dynamics 53.2020-05-06(2019).