气候变化领域集成服务门户(CCPortal): Investigation of the 2016 March to May extreme rainfall over Rwanda

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DOI	10.1007/s11069-021-04697-7
	Investigation of the 2016 March to May extreme rainfall over Rwanda
	Umutoni M.A.; Japheth L.P.; Lipiki E.J.; Kebacho L.L.; Limbu P.T.S.; Makula E.K.
发表日期	2021
ISSN	0921030X
起始页码	607
结束页码	618
卷号	108 期号:1
英文摘要	This paper investigates the features of extreme rainfalls and associated floods during March to May (MAM) season in 2016 over Rwanda and the atmospheric circulation influencing these rainfalls. All stations over the study area received above the average rainfall during MAM (long rain) season in 2016. Among all the months in this season, the rainiest month was April when most parts of the country received highest amounts of rainfall (≥ 180 mm). The presence of anomalous high pressure over the southwestern Indian Ocean, with the help of intense Mascarene high, advected warm moist air through southeasterly winds toward the study area. During this rainy season, the study area was characterized by convergence (divergence) in the lower (upper) troposphere, implying ascending (descending) motion. The ascending moist air at lower level enhanced convection and hence enhanced rainfall over Rwanda. This is associated with more convective activities over central Indian Ocean, and central to eastern Pacific Ocean due to vertical stretching. Moreover, the heavy rainfall events occurred in 2016 are strongly connected to Indian Ocean Dipole Modoki and El Niño due to observed above normal Sea Surface Temperature anomalies over the central Indian Ocean and central to eastern Pacific Ocean, respectively. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	Extreme rainfall Flood MAM Rwanda Sea surface temperature
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206618
作者单位	College of Atmospheric Sciences, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing, Jiangsu Province 210044, China; Rwanda Meteorology Agency, P.O. Box 898, Kigali, Rwanda; Tanzania Meteorological Authority, P.O. Box 3056, Dar es Salaam, Tanzania; Physics Department, University of Dar Es Salaam, P.O. Box 35063, Dar es Salaam, Tanzania
推荐引用方式 GB/T 7714	Umutoni M.A.,Japheth L.P.,Lipiki E.J.,et al. Investigation of the 2016 March to May extreme rainfall over Rwanda[J],2021,108(1).
APA	Umutoni M.A.,Japheth L.P.,Lipiki E.J.,Kebacho L.L.,Limbu P.T.S.,&Makula E.K..(2021).Investigation of the 2016 March to May extreme rainfall over Rwanda.Natural Hazards,108(1).
MLA	Umutoni M.A.,et al."Investigation of the 2016 March to May extreme rainfall over Rwanda".Natural Hazards 108.1(2021).