气候变化领域集成服务门户(CCPortal): Improved climatological precipitation characteristics over West Africa at convection-permitting scales

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DOI	10.1007/s00382-019-04759-4
	Improved climatological precipitation characteristics over West Africa at convection-permitting scales
	Berthou S.; Rowell D.P.; Kendon E.J.; Roberts M.J.; Stratton R.A.; Crook J.A.; Wilcox C.
发表日期	2019
ISSN	0930-7575
起始页码	1991
结束页码	2011
卷号	53 期号:2020-03-04
英文摘要	The West African climate is unique and challenging to reproduce using standard resolution climate models as a large proportion of precipitation comes from organised deep convection. For the first time, a regional 4.5 km convection permitting simulation was performed on a pan-African domain for a period of 10 years (1997–2006). The 4.5 km simulation (CP4A) is compared with a 25 × 40 km convection-parameterised model (R25) over West Africa. CP4A shows increased mean precipitation, which results in improvements in the mature phase of the West African monsoon but deterioration in the early and late phases. The distribution of precipitation rates is improved due to more short lasting intense rainfall events linked with mesoscale convective systems. Consequently, the CP4A model shows a better representation of wet and dry spells both at the daily and sub-daily time-scales. The diurnal cycle of rainfall is improved, which impacts the diurnal cycle of monsoon winds and increases moisture convergence in the Sahel. Although shortcomings were identified, with implications for model development, this convection-permitting model provides a much more reliable precipitation distribution than its convection-parameterised counterpart at both daily and sub-daily time-scales. Convection-permitting scales will therefore be useful to address the crucial question of how the precipitation distribution will change in the future. © 2019, The Author(s).
语种	英语
scopus关键词	atmospheric convection; climate modeling; climatology; mesoscale meteorology; monsoon; precipitation (climatology); Sahel [Sub-Saharan Africa]; West Africa
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/146126
作者单位	Hadley Centre, Met Office, FitzRoy Rd, Exeter, United Kingdom; Met Office, FitzRoy Rd, Exeter, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Institut des Géosciences de l’Environnement (IGE), Université Grenoble Alpes, Grenoble, France
推荐引用方式 GB/T 7714	Berthou S.,Rowell D.P.,Kendon E.J.,et al. Improved climatological precipitation characteristics over West Africa at convection-permitting scales[J],2019,53(2020-03-04).
APA	Berthou S..,Rowell D.P..,Kendon E.J..,Roberts M.J..,Stratton R.A..,...&Wilcox C..(2019).Improved climatological precipitation characteristics over West Africa at convection-permitting scales.Climate Dynamics,53(2020-03-04).
MLA	Berthou S.,et al."Improved climatological precipitation characteristics over West Africa at convection-permitting scales".Climate Dynamics 53.2020-03-04(2019).