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DOI	10.1007/s00382-020-05438-5
	Characteristics and thermodynamics of Sahelian heatwaves analysed using various thermal indices
	Guigma, Kiswendsida H.; Todd, Martin; Wang, Yi
通讯作者	Guigma, KH ; Wang, Y
来源期刊	CLIMATE DYNAMICS
ISSN	0930-7575
EISSN	1432-0894
出版年	2020
卷号	55 期号:11-12 页码:3151-3175
英文摘要	Prolonged periods of extreme heat also known as heatwaves are a growing concern in a changing climate. Over the Sahel, a hot and semi-arid region in West Africa, they are still relatively poorly understood and managed. In this research, five multivariate thermal indices derived from the ERA5 database were used to characterize Sahelian heatwaves for statistical analysis and as a sampling basis to investigate their underlying thermodynamic causes. Results show that on average most locations in the Sahel suffer from one or two heatwaves a year lasting 3-5 days but with severe magnitude. The eastern Sahel is more at risk than the west, experiencing more frequent and longer lasting events. Despite similar statistics of intensity, duration and frequency across the heatwave indices, for a given diurnal phase, there is surprisingly low agreement in the timing of events. Furthermore daytime and nighttime heatwaves have little synchronicity. In terms of associated thermodynamic processes, heat advection and the greenhouse effect of moisture are identified as the main causes of Sahelian heatwaves. The processes are nevertheless sensitive to the indices, consequence of the distinctness of their respective samples. Therefore attention should be given to the choice of either index in operational monitoring and forecasting of heatwaves. This will allow to effectively target different exposed socio-economic groups and resultantly enhance the efficiency of early warning systems.
英文关键词	Heatwaves Sahel Thermal indices Simultaneousness Thermodynamic processes
类型	Article
语种	英语
开放获取类型	Green Accepted, hybrid
收录类别	SCI-E
WOS记录号	WOS:000565110600001
WOS关键词	HEAT WAVES ; SEASONAL EVOLUTION ; STRESS INDEX ; TEMPERATURE ; CLIMATE ; IMPACT ; WEATHER ; AFRICA ; HEALTH ; SUMMER
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325975
作者单位	[Guigma, Kiswendsida H.; Todd, Martin; Wang, Yi] Univ Sussex, Brighton, E Sussex, England
推荐引用方式 GB/T 7714	Guigma, Kiswendsida H.,Todd, Martin,Wang, Yi. Characteristics and thermodynamics of Sahelian heatwaves analysed using various thermal indices[J],2020,55(11-12):3151-3175.
APA	Guigma, Kiswendsida H.,Todd, Martin,&Wang, Yi.(2020).Characteristics and thermodynamics of Sahelian heatwaves analysed using various thermal indices.CLIMATE DYNAMICS,55(11-12),3151-3175.
MLA	Guigma, Kiswendsida H.,et al."Characteristics and thermodynamics of Sahelian heatwaves analysed using various thermal indices".CLIMATE DYNAMICS 55.11-12(2020):3151-3175.