Atmospheric systems and rainfall typology in anomalous years without the occurrence of the ENOS in Guarapuava-PR

Abstract

Rainfall is one of the main climatological variables. When exceptional events of rainfall occur, how negative or positive deviation impact directly on society. Because of this, this work had as a main goal to analyze the atmospheric systems and the rainfall typology in anomalous years, but without the possible influence of the ENOS in Guarapuava-PR-Brazil. In order to analyze the active
systems and the rainfall typology were used IAPAR’s secondary data, from 1988 to 2018. The annual and monthly average were computed, and based on this averages the positive and negative
deviate standard were performed in Microsoft Excel. The IAC calculation was also done and analyzed its intensity to anomalous years definition. In order to view the active systems and the rainfall typology, which made possible the anomalous, it were used Marine’s synoptic letters and satellite images. The results showed that high pressure stagnant areas on Central Brazil region is the
major responsible by the dry days in Guarapuava, while the Cold Fronts advance on low pressure areas trigger systems that lift the rainfall rates.