气候变化领域集成服务门户(CCPortal): Does convection-permitting simulate better rainfall distribution and extreme over Guinean coast and surroundings?

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DOI	10.1007/s00382-018-4308-y
	Does convection-permitting simulate better rainfall distribution and extreme over Guinean coast and surroundings?
	Kouadio K.; Bastin S.; Konare A.; Ajayi V.O.
发表日期	2020
ISSN	0930-7575
起始页码	153
结束页码	174
卷号	55
英文摘要	This research work focuses on the problem of climate simulation of rainfall over West Africa and particularly over coastal countries of the Gulf of Guinea by Regional Climate Models. The sensitivities of Weather Research and Forecasting (WRF) Model were tested for changes in horizontal resolution (convection permitting versus parameterized) on the replication of West African monsoon for the year 2014. Sensitivity test was also performed for response of rainfall to changes in microphysics (MP) and planetary boundary layer (PBL) schemes. Generally, the result shows that WRF is able to replicates rainfall distribution with an adequate representation of the dynamical features of West African monsoon system. The high-resolution (wrf-4km) shows dry bias along the coast of the Gulf of Guinea but generally outperforms wrf-24km run especially in replication of the extreme rainfall distribution. The dry bias along the coastal area is suggested to not to be only related to convection but mostly to microphysics and PBL parameterisation schemes. Differences were noticed between the dynamics of WRF and ERA-interim outputs despite the use of spectral nudging in the experiment which then suggest strong interactions between scales. These differences were observed to be restricted mainly to the low-layer monsoon flow in JJA. Both runs at 24 and 4 km hardly simulate the typical diurnal distribution of rainfall. The sensitivity of WRF to MP (only sophisticated MP were tested) and PBL reveals a stronger impact of PBL than MP on rainfall distribution and the most significant added value over the Guinean coast and surroundings area was provided by the configurations using non-local PBL scheme (as ACM2). The changes in MP and PBL schemes in general seem to have less effect on the explicit runs (wrf-4km) in the replication of the rainfall over the Gulf of Guinea and the surroundings seaboard. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Convection permitting; High resolution; Parameterization; Rainfall; West Africa monsoon; WRF
语种	英语
scopus关键词	atmospheric convection; climate modeling; climate variation; computer simulation; extreme event; monsoon; rainfall; regional climate; spatial distribution; Atlantic Ocean; Guinea; Gulf of Guinea
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/145421
作者单位	Laboratoire de Physique de l’Atmosphère et Mécanique des Fluides (LAPA-MF), UFR SSMT, Université Felix Houphouët-Boigny, Abidjan, Cote d'Ivoire; LATMOS/IPSL, UVSQ Université Paris-Saclay, UPMC Univ. Paris 06, CNRS, Guyancourt, France; WASCAL Graduate Research Program on West African Climate System (WACS), Federal University of Technology, Akure (FUTA), Akure, Nigeria
推荐引用方式 GB/T 7714	Kouadio K.,Bastin S.,Konare A.,et al. Does convection-permitting simulate better rainfall distribution and extreme over Guinean coast and surroundings?[J],2020,55.
APA	Kouadio K.,Bastin S.,Konare A.,&Ajayi V.O..(2020).Does convection-permitting simulate better rainfall distribution and extreme over Guinean coast and surroundings?.Climate Dynamics,55.
MLA	Kouadio K.,et al."Does convection-permitting simulate better rainfall distribution and extreme over Guinean coast and surroundings?".Climate Dynamics 55(2020).