干旱区生态环境知识资源中心(Arid): Heat wave occurrences over Senegal during spring: Regionalization and synoptic patterns

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DOI	10.1002/joc.6220
	Heat wave occurrences over Senegal during spring: Regionalization and synoptic patterns
	Sambou, Marie-Jeanne G.1,2; Janicot, Serge 2; Pohl, Benjamin 3; Badiane, Daouda 1; Dieng, Abdou Lahat 1; Gaye, Amadou 1
通讯作者	Sambou, Marie-Jeanne G.
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2020
卷号	40 期号:1 页码:440-457
英文摘要	Based on 12 Senegalese stations of the Global Summary of the Day (GSOD) database (1979-2014), heat waves (HW) are defined for each station in spring (March-April-May, the hottest season in Senegal) as the daily maximum temperature (Tx), minimum temperature (Tn), or average apparent temperature of the day (AT), exceeding the corresponding 95% mobile percentile for at least three consecutive days. A hierarchical cluster analysis used to regionalize HW in these 12 stations is applied to simultaneous occurrences of daily temperature peaks over their 95% mobile percentiles. Three homogeneous zones of four stations each are identified (Zone 1, Zone 2 and Zone 3), from west (Atlantic coastline) to east (inland Senegal). Atmospheric circulation associated with HW is assessed through composites of ERA-Interim deseasonalized anomalies, with the start date of each HW in each zone used as a reference. The main pattern controlling the presence of HW in Senegal consists in positive pressure anomalies centred around the strait of Gibraltar, promoting easterly to northeasterly wind anomalies. This causes higher temperatures in the three zones of Senegal, and lower temperatures and drier air over the central Sahel. This pattern is opposite to that characteristic of HW in the central Sahel shown in previous studies. From Zone 1 to Zone 3, the temperature and moisture patterns are shifted to the east while pressure anomalies weaken drastically. Night-time Tn-HW are characterized by higher water vapour contents than daytime Tx-HW, corroborating and complementing previous studies over the Sahel. These HW patterns are close to the canonical mode of intra-seasonal atmospheric variability over Senegal.
英文关键词	atmospheric circulation heat wave regionalization Senegal temperature
类型	Article
语种	英语
国家	Senegal ; France
收录类别	SCI-E
WOS记录号	WOS:000478738600001
WOS关键词	CLIMATE EXTREMES ; TEMPERATURE ; TRENDS ; WEATHER ; MORTALITY ; DESERT ; SCALE
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216388
作者单位	1.Univ Cheikh Anta Diop, LPAO SF, Lab Phys Atmosphere & Ocean Simeon Fongang, Dakar 5085, Senegal; 2.Sorbonne Univ UPMC, CNRS, MNHN, IRD,LOCEAN, Paris, France; 3.Univ Bourgogne Franche Comte, CNRS, CRC, UMR6282 Biogeosci, Dijon, France
推荐引用方式 GB/T 7714	Sambou, Marie-Jeanne G.,Janicot, Serge,Pohl, Benjamin,et al. Heat wave occurrences over Senegal during spring: Regionalization and synoptic patterns[J]. French National Research Institute for Sustainable Development,2020,40(1):440-457.
APA	Sambou, Marie-Jeanne G.,Janicot, Serge,Pohl, Benjamin,Badiane, Daouda,Dieng, Abdou Lahat,&Gaye, Amadou.(2020).Heat wave occurrences over Senegal during spring: Regionalization and synoptic patterns.INTERNATIONAL JOURNAL OF CLIMATOLOGY,40(1),440-457.
MLA	Sambou, Marie-Jeanne G.,et al."Heat wave occurrences over Senegal during spring: Regionalization and synoptic patterns".INTERNATIONAL JOURNAL OF CLIMATOLOGY 40.1(2020):440-457.