Contribuição dos fluxos de umidade em evento de precipitação intensa ocorrido no leste do Nordeste do Brasil em maio de 2017: um estudo de caso

Abstract

The observation of spatial and temporal distribution of the rainfall regime of the Northeast of Brazil (NEB) becomes a challenge due to its great variability in time and space. In the period from May 25 to 29, 2017, heavy rains occurred in the eastern part of the NEB, mainly between the states of Alagoas and Pernambuco. Thus, the objective of this work was to verify the contribution of the moisture flow associated to the event of severe precipitation occurred in the eastern region of the NEB. Specifically, it is intended to ascertain the physical and synoptic characteristics of said event. In order to do so, we used data from automatic rain gauges of the National Center for Natural Disaster Monitoring and Alarms (CEMADEN), GOES-13 satellite images and reanalysis from the European Center for Medium-Range Weather Forecasts (ECMWF) ERA-5. The main results showed that the vertical moisture transport presented strong nuclei of moisture convergence in the Atlantic Ocean towards the study area, when the precipitation system was in the maturation stage