气候变化领域集成服务门户(CCPortal): Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016

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DOI	10.3724/SP.J.1226.2021.19059
	Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016
	Celestin, Sindikubwabo; Feng, Qi; Li, RuoLin; Cheng, WenJu; Ma, Jian; Telesphore, Habiyakare; Vincent, Nzabarinda
发表日期	2021
ISSN	1674-3822
起始页码	220
结束页码	233
卷号	13 期号:3
英文摘要	Rainfall variability dominates livelihoods in all countries of Saharan Africa. To better understand the processes involved in Sahara precipitation changes, we used the Global Precipitation Climatology Center (GPCC) dataset to examine dry and wet seasonal trends in the Sahara region from 1979 to 2016. We also used the European Centre for Medium-Range Weather Forecasts (ECMWF) to evaluate the general atmospheric circulation associated with seasonal change of Sahara precipitation. The Mann-Kendall test and Theil sens' slope estimator methods were adopted to test and estimate the significance and weight of precipitation trend, respectively. The results revealed that Sahara precipitation has increased significantly. The seasonal evaluation shows a positive trend of 0.42 mm/decade and 1.43 mm/decade in JAS (June, August, and September) seasons for the northern and southern Saharan Desert, respectively. Moreover, the JFMA (January, February, March, and April) period shows a negative trend but not statistically significant. An examination of the general circulation and moisture transport changes suggested an increase of rainfall in southern Sahara. The wet period is also driven by northward penetration of moisture originating from the Sahel region, African Easterly Jet (AEJ), and weakening in the upper tropospheric zonal wind. Summer rainfall has also been likely associated with positive anomalies of sea surface temperature (SST) in the North Tropical Atlantic (NTA) and the Mediterranean Sea.
英文关键词	Sahara; precipitation; variability; arid; Africa; climate
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS关键词	CLIMATE-CHANGE ; AFRICAN DROUGHT ; RAINFALL ; TREND ; TERM ; SATELLITE ; IMPACT ; WATER
WOS记录号	WOS:000686565700004
来源期刊	SCIENCES IN COLD AND ARID REGIONS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239438
作者单位	[Celestin, Sindikubwabo; Feng, Qi; Li, RuoLin; Cheng, WenJu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, 320 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China; [Celestin, Sindikubwabo; Cheng, WenJu; Telesphore, Habiyakare; Vincent, Nzabarinda] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, RuoLin] Qilian Mt Eco Environm Res Ctr, Lanzhou 730000, Gansu, Peoples R China; [Ma, Jian] Acad Water Resources Conservat Forests Qilian Mt, Zhangye 734000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Celestin, Sindikubwabo,Feng, Qi,Li, RuoLin,et al. Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016[J]. 中国科学院西北生态环境资源研究院,2021,13(3).
APA	Celestin, Sindikubwabo.,Feng, Qi.,Li, RuoLin.,Cheng, WenJu.,Ma, Jian.,...&Vincent, Nzabarinda.(2021).Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016.SCIENCES IN COLD AND ARID REGIONS,13(3).
MLA	Celestin, Sindikubwabo,et al."Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016".SCIENCES IN COLD AND ARID REGIONS 13.3(2021).