Climatic aspects and vertical structure circulation associated with the severe drought in Northeast Brazil (2012–2016)
作者： Felipe Jeferson de Medeiros , Cristiano Prestrelo de Oliveira , Roger Rodrigues Torres
DOI: 10.1007/S00382-020-05385-1
关键词: Precipitation 、 Climatology 、 Walker circulation 、 South Atlantic Convergence Zone 、 Subsidence (atmosphere) 、 Wet season 、 Intertropical Convergence Zone 、 Atmospheric circulation 、 Geology 、 Sea surface temperature 、 Atmospheric Science
摘要: This study provides an updated dynamical analysis of the observed climate conditions during longest, most severe and continuous drought (2012–2016) ever recorded in Northeast Brazil (NEB). investigation was carried out based on temperature, precipitation, sea surface outgoing long-wave radiation, ERA-Interim reanalysis data from 1981 to 2016. done by first looking for area NEB where severe, then calculating main rainy season anomalies atmospheric parameters 2012 2016 relation climatological (1981–2010). Results show this event influenced mainly two distinct oceanic that induced anomalous circulation patterns. The negative precipitation were firstly related northward displacement Intertropical Convergence Zone (ITCZ), followed upward motion over Western Amazon, as well deficit along South Atlantic Zone, slightly displaced southward position. From 2015 subsidence linked descending branch Walker circulation, strong flow convection ITCZ Africa Gulf Mexico.
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