Open AccessEstudo das componentes do balanço hidrológico durante episódios de ZCAS
Author(s) -
Ana Paula da Silva Faggiani,
Mário Francisco Leal de Quadro,
Luis de Gonçalves de Gustavo Gonçalves,
Dirceu Luís Herdies
Publication year - 2020
Publication title -
ciência e natura
Language(s) - English
Resource type - Journals
eISSN - 2179-460X
pISSN - 0100-8307
DOI - 10.5902/2179460x55315
Subject(s) - evapotranspiration , precipitation , environmental science , humidity , amazon rainforest , climatology , atmosphere (unit) , morning , daytime , atmospheric sciences , water vapor , geography , meteorology , geology , ecology , biology , medicine
The South Atlantic Convergence Zone (SACZ) is one of the meteorological systems that plays a strong role in the rainfall regime in many regions of Brazil. This work aims to analyze the daytime cycle of the components of the hydrological balance during events of SACZ. Through the hourly data from the atmospheric reanalysis of Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA2) the variables evapotranspiration, precipitation, convergence of moisture flow and variation of moisture storage in the atmosphere with time during the periods were analyzed. from dawn, morning, afternoon and night throughout the region of the SACZ and therefore, specifically in the region of the Amazon and Southeast Brazil. The analysis of the regions separately shows that even during the night there is convective activity and divergence of water vapor in the Amazon, which allows the flow of steam to be transported to the southeast even during night periods. Over the Southeast region it is possible to verify that during the night the convergence of atmospheric humidity can explain almost entirely the precipitation during the night. During the hours of the day, much of the precipitation can be explained by the increase in evapotranspiration over the Southeast.