气候变化领域集成服务门户(CCPortal): On the sensitivity of seasonal and diurnal precipitation to cumulus parameterization over CORDEX-EA-II

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DOI	10.1007/s00382-019-05010-w
	On the sensitivity of seasonal and diurnal precipitation to cumulus parameterization over CORDEX-EA-II
	Niu X.; Tang J.; Wang S.; Fu C.; Chen D.
发表日期	2020
ISSN	0930-7575
起始页码	373
结束页码	393
卷号	54 期号:2020-01-02
英文摘要	The ability of the Weather Research and Forecasting (WRF) model in simulating the seasonal and diurnal cycles of rainfall over the Coordinated Regional Climate Downscaling Experiment East Asia Phase II (CORDEX-EA-II) domain is validated against the Tropical Rainfall Measuring Mission (TRMM) datasets. A focus is placed on the role of convective parameterization (CP) schemes. A set of numerical experiments at a 25 km resolution for 1998–2009, using six different CPs, is performed to evaluate the physics-dependency of simulation results. All CPs simulate realistic summer mean precipitation and its northward propagation, with the best performance in the Simplified Arakawa-Schubert (SAS). The biases in the seasonal evolution of rainfall are related to the deficiency in simulated low-level winds and the northward propagation of the cyclonic vorticity. The simulated earlier peak time in other CPs is delayed by about 1–2 h by the Kain-Fritsch with a modified trigger function (KFMT), although this scheme shows a disadvantage in the magnitude. The performance of different CPs in simulating diurnal rainfall cycles is dependent on regions, and none of them performs better than the others for all the sub-regions. The initiation of simulated convection is weakly physics-dependent. However, the timing and magnitude of stratiform precipitation differ among the six experiments. A further analysis shows that the dry biases over the lower Yangtze River basin are a result of the weakened southwesterly water vapor transport, while the excessive afternoon rainfall in the Kain-Fritsch (KF) simulation is attributed to the largest positive perturbation in the lower level atmosphere, especially the enhanced vertical transport of humidity. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Convective parameterization schemes; Convective precipitation; CORDEX-EA-II; Stratiform precipitation; WRF regional model
语种	英语
scopus关键词	convective cloud; cumulus; diurnal variation; parameterization; precipitation (climatology); seasonal variation; stratiform cloud; weather forecasting; China; Yangtze Basin
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/145771
作者单位	Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing, China; Jiangsu Collaborative Innovation Center for Climate Change, Nanjing, China; Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
推荐引用方式 GB/T 7714	Niu X.,Tang J.,Wang S.,et al. On the sensitivity of seasonal and diurnal precipitation to cumulus parameterization over CORDEX-EA-II[J],2020,54(2020-01-02).
APA	Niu X.,Tang J.,Wang S.,Fu C.,&Chen D..(2020).On the sensitivity of seasonal and diurnal precipitation to cumulus parameterization over CORDEX-EA-II.Climate Dynamics,54(2020-01-02).
MLA	Niu X.,et al."On the sensitivity of seasonal and diurnal precipitation to cumulus parameterization over CORDEX-EA-II".Climate Dynamics 54.2020-01-02(2020).