Descrição
In this investigation, we analyzed expressive daily accumulated of pluvial precipitation that occurred in March 2019 in the State of Ceará, in order to identify if they were considered extreme (from the Statistical Methodology of the Maximum Precipitation), and to analyze the atmospheric systems that started such events and possible damage caused by them. The ten largest daily accumulations of March recorded in the posts of the Foundation for Metereological and Hydric Resources of Ceará State (FUNCEME) were selected. At the same time, the atmospheric systems that contributed to these pluviometric episodes were identified from satellite images provided by the National Institute of Space Research (INPE). Daily accruals were at least one of the three largest already registered at the stations (five were records) and were associated with joint performance of two or more atmospheric systems. Atlantic TMSM (near the coast) showed a favorable pattern for precipitation. The daily accumulations were punctual and allowed a considerable contribution only in some water reserves of the Ceará State, because the rain did not present a homogeneous spatial/temporal distribution.||Nesta investigação, foram analisados acumulados diários expressivos de precipitação pluvial que ocorreram em março de 2019 no estado do Ceará, com o intuito de identificar se os mesmos foram considerados extremos (a partir da Metodologia Estatística dos Máximos de Precipitação), além de analisar os sistemas atmosféricos que deflagraram tais eventos e possíveis danos ocasionados. Foram selecionados os dez maiores acumulados diários de março registrados nos postos da Fundação Cearense de Meteorologia e Recursos Hídricos - FUNCEME e identificados os sistemas atmosféricos atuantes que contribuíram para tais episódios pluviométricos a partir de imagens de satélites disponibilizadas pelo Instituto Nacional de Pesquisas Espaciais - INPE. Os acumulados diários foram, ao menos, um dos três maiores já registrados nos postos (cinco foram recordes) e estavam associados à atuação conjunta de dois ou mais sistemas atmosféricos. As TSMs do Atlântico (próximo à costa) apresentaram um padrão favorável à ocorrência de precipitações. Os acumulados diários foram pontuais e contribuíram para um considerável aporte de água apenas em algumas reservas hídricas do estado, pois as chuvas não apresentaram uma distribuição espaço-temporal homogênea.
Abstract
EXTREME EVENTS IN THE STATE OF CEARÁ, BRAZIL: A STATISTICAL ANALYSIS OF RAINFALL EPISODES IN MARCH 2019
In this investigation, we analyzed expressive daily accumulated of pluvial precipitation that occurred in March 2019 in the State of Ceará, in order to identify if they were considered extreme (from the Statistical Methodology of the Maximum Precipitation), and to analyze the atmospheric systems that started such events and possible damage caused by them. The ten largest daily accumulations of March recorded in the posts of the Foundation for Metereological and Hydric Resources of Ceará State (FUNCEME) were selected. At the same time, the atmospheric systems that contributed to these pluviometric episodes were identified from satellite images provided by the National Institute of Space Research (INPE). Daily accruals were at least one of the three largest already registered at the stations (five were records) and were associated with joint performance of two or more atmospheric systems. Atlantic TMSM (near the coast) showed a favorable pattern for precipitation. The daily accumulations were punctual and allowed a considerable contribution only in some water reserves of the Ceará State, because the rain did not present a homogeneous spatial/temporal distribution.
