气候变化领域集成服务门户(CCPortal): Climatic aspects and vertical structure circulation associated with the severe drought in Northeast Brazil (2012

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DOI	10.1007/s00382-020-05385-1
	Climatic aspects and vertical structure circulation associated with the severe drought in Northeast Brazil (2012–2016)
	de Medeiros F.J.; de Oliveira C.P.; Torres R.R.
发表日期	2020
ISSN	0930-7575
起始页码	2327
结束页码	2341
卷号	55
英文摘要	This study provides an updated dynamical analysis of the observed climate conditions during the longest, most severe and continuous drought (2012–2016) ever recorded in Northeast Brazil (NEB). This investigation was carried out based on temperature, precipitation, sea surface temperature, outgoing long-wave radiation, and ERA-Interim reanalysis data from 1981 to 2016. This was done by first looking for the area of the NEB where the drought was most severe, and then calculating the main rainy season anomalies and atmospheric parameters from 2012 to 2016 in relation to the climatological conditions (1981–2010). Results show this drought event was influenced mainly by two distinct oceanic conditions that induced anomalous atmospheric circulation patterns. The observed negative precipitation anomalies were firstly related to the northward displacement of the Intertropical Convergence Zone (ITCZ), followed by an anomalous upward motion over the Western Amazon, as well as the anomalous precipitation deficit along the South Atlantic Convergence Zone, that was slightly displaced southward of the climatological position. From 2015 to 2016 the subsidence over NEB Brazil was linked to the descending branch of the Walker circulation, as well as to the strong anomalous flow induced by convection in the ITCZ over Africa and Gulf of Mexico. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate variability; Drought dynamics; ENSO; Precipitation; Subsidence
语种	英语
scopus关键词	air-sea interaction; atmospheric deposition; atmospheric structure; climate effect; climate variation; drought; El Nino-Southern Oscillation; intertropical convergence zone; longwave radiation; precipitation (climatology); sea surface temperature; subsidence; Walker circulation; Atlantic Ocean; Atlantic Ocean (South); Brazil
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/145306
作者单位	Graduate Program in Climate Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil; Department of Atmospheric and Climate Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil; Natural Resources Institute, Federal University of Itajubá (UNIFEI), Itajubá, Minas Gerais, Brazil
推荐引用方式 GB/T 7714	de Medeiros F.J.,de Oliveira C.P.,Torres R.R.. Climatic aspects and vertical structure circulation associated with the severe drought in Northeast Brazil (2012–2016)[J],2020,55.
APA	de Medeiros F.J.,de Oliveira C.P.,&Torres R.R..(2020).Climatic aspects and vertical structure circulation associated with the severe drought in Northeast Brazil (2012–2016).Climate Dynamics,55.
MLA	de Medeiros F.J.,et al."Climatic aspects and vertical structure circulation associated with the severe drought in Northeast Brazil (2012–2016)".Climate Dynamics 55(2020).