Abstract
The development of novel diagnostic tools for enhancing climate monitoring capabilities is being increasingly demanded by several important societal sectors, such as agriculture, energy production, and industry, among others. This study aims to contribute to such developments by characterizing the observed daily precipitation conditions within the climatic context for the austral summer months over the southeast region of the state of São Paulo, Brazil. The characterization was designed to quantify the climatological features of daily precipitation and of the number of rainy (or wet) days. The objective is to provide complementary information to the traditionally available monthly and annual precipitation monitoring. Such a diagnostic characterization can assist answering the following questions: How did daily precipitation behave in southeast São Paulo during the last two decades? What is the typical distribution of summer precipitation in southeast São Paulo? How many wet summer days are typically observed in southeast São Paulo? How many wet summer days were observed during the last two decades? What is the typical distribution of wet summer days in southeast São Paulo? How have the latest years been in terms of wet summer days? The daily precipitation and wet day characterization was performed using historical data for the 1998/1999 to 2017/2018 period. The representativeness of these characteristics was assessed using a four times longer time series from a meteorological station located within the investigated region. The analysis indicated that for the southeast region of the state of São Paulo, the 2013/2014 summer period presented values well below those previously recorded in association with exceptionally dry conditions established over this region, corroborating previous findings but now from the perspective of daily precipitation information.
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Acknowledgments
I.M.S. was supported by CNPq, process 303429/2016-0. The Brazilian National Meteorological Service (INMET), CPTEC/INPE, and the regional meteorological centers in Brazil are acknowledged for making their precipitation data records available for the research performed in this study. C.A.S.C. thanks Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) process 304586/2016-1 and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), process 2015/50687-8 (CLIMAX Project) for the support received for the development of this research. The Institute of Astronomy, Geophysics and Atmospheric Sciences (IAG) of the University of São Paulo (USP) is acknowledged for making their precipitation data records available for the research performed in this study. The constructive criticism, comments, and suggestions of anonymous reviewers helped to substantially improve the quality of this manuscript.
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Scricco, I.M., Coelho, C.A.S. Summer daily precipitation and wet day climatological features in southeast São Paulo, Brazil. Theor Appl Climatol 137, 1997–2010 (2019). https://doi.org/10.1007/s00704-018-2723-y
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DOI: https://doi.org/10.1007/s00704-018-2723-y