Using a Simple Methodology to Assess the Acceleration in Daily Precipitation Extreme Events in the São Paulo Metropolitan Region

Osvaldo Luiz Leal de Moraes ()
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Osvaldo Luiz Leal de Moraes: National Center for Monitoring and Early Warning of Natural Disasters–CEMADEN, Estrada Dr Altino Biondessan 500, São José dos Campos 12247-016, Brazil

Geographies, 2022, vol. 2, issue 4, 1-10

Abstract: This article analyses a near-centennial time series of daily precipitation in the Metropolitan Region of São Paulo, Brazil, in order to quantify the detectable increase in intensity and/or frequency of extreme events. This area is the most populated in the southern hemisphere, and heavy or extreme precipitation events, mainly those related with hydro-meteorological disasters, have important effects on its society. Indexes derived from daily precipitation data through a simple methodological approach are able to quantify changes at decadal and annual time scales. The analysis was carried out for five thresholds, i.e., daily precipitation higher than 50, 60, 70, 80, and 90 mm. The indexes exhibited statistically trends in both precipitation intensity and frequency for all thresholds, indicating significant changes in daily extreme events in the study period.

Keywords: daily precipitation; extreme precipitation events; metropolitan region of São Paulo (search for similar items in EconPapers)
JEL-codes: Q1 Q15 Q5 Q53 Q54 Q56 Q57 (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jgeogr:v:2:y:2022:i:4:p:44-733:d:975281

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