气候变化领域集成服务门户(CCPortal): Revised cloud and convective parameterization in CFSv2 improve the underlying processes for northward propagation of Intraseasonal oscillations as proposed by the observation-based study

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DOI	10.1007/s00382-019-04657-9
	Revised cloud and convective parameterization in CFSv2 improve the underlying processes for northward propagation of Intraseasonal oscillations as proposed by the observation-based study
	Ganai M.; Mukhopadhyay P.; Krishna R.P.M.; Abhik S.; Halder M.
发表日期	2019
ISSN	0930-7575
起始页码	2793
结束页码	2805
卷号	53 期号:2020-05-06
英文摘要	The performance of revised climate forecast system version 2 (CFSv2) are evaluated on the simulation of the underlying cloud and convective processes associated with the strong and weak boreal summer intraseasonal oscillations (BSISOs) events. The revised version of the CFSv2 consists of a six-class Weather Research Forecasting single moment (WSM6) cloud microphysics scheme and the default version has Zhao and Carr (ZC) cloud microphysics scheme. Both the version uses revised simplified Arakawa-Schubert (RSAS) convection scheme. The study reveals that the revised version of CFSv2 (RSAS-WSM) is able to better simulate the northward propagation of BSISOs and associated dynamical and thermodynamical mechanism put forward by earlier observation-based studies. It is found that the large-scale organized northwest-southeast tilted structure of rain band is better captured in RSAS-WSM simulation as compared to the default version of CFSv2 (RSAS-ZC) during strong BSISO events. Further, the reasonable large-scale or stratiform rainfall associated with the northward propagating strong BSISO events is seen in RSAS-WSM while it is completely missing in RSAS-ZC simulation. The pressure-latitude profiles of cloud liquid water (CLW) and cloud ice (CLI) show more realistic steady northward propagation in RSAS-WSM simulation. Consistent with the CLW and CLI distribution and their influence on the large-scale heating structure, the large-scale condensation heating shows quasi-periodic northward propagation in RSAS-WSM whereas such type of distribution is not captured in RSAS-ZC simulation. The realistic representation of cloud processes in WSM leads to simulate reasonable dynamical and thermodynamical processes associated with the strong BSISO events which follows the observation-based hypothesis proposed by earlier studies. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	atmospheric convection; atmospheric dynamics; climate prediction; cloud microphysics; computer simulation; convective system; parameterization; rainband; rainfall; thermodynamics
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/146063
作者单位	Indian Institute of Tropical Meteorology (IITM), Dr. Homi Bhabha Road, Pashan, Pune, 411008, India; Savitribai Phule Pune University, Pune, India; Center for Prototype Climate Modeling, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates; Climate Research Section, Bureau of Meteorology, Melbourne, Australia; Allahabad University, Allahabad, 211002, India
推荐引用方式 GB/T 7714	Ganai M.,Mukhopadhyay P.,Krishna R.P.M.,et al. Revised cloud and convective parameterization in CFSv2 improve the underlying processes for northward propagation of Intraseasonal oscillations as proposed by the observation-based study[J],2019,53(2020-05-06).
APA	Ganai M.,Mukhopadhyay P.,Krishna R.P.M.,Abhik S.,&Halder M..(2019).Revised cloud and convective parameterization in CFSv2 improve the underlying processes for northward propagation of Intraseasonal oscillations as proposed by the observation-based study.Climate Dynamics,53(2020-05-06).
MLA	Ganai M.,et al."Revised cloud and convective parameterization in CFSv2 improve the underlying processes for northward propagation of Intraseasonal oscillations as proposed by the observation-based study".Climate Dynamics 53.2020-05-06(2019).