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Numerical simulations indicate specific changes in the precipitation patterns, mainly during the summer period, over South America due to deforestation scenarios of Amazonian forest: precipitation decrease over adjacent and deforested areas, and, on the other hand, precipitation increase over the eastern South America sector, what is associated with the intensification of high levels circulation. Observational studies indicate a dipole-like precipitation pattern over the eastern side of South America during the positive and negative PDO phases. Positive and negative precipitation anomalies are mostly observed over northeastern and southeastern South America, respectively, during the positive PDO phases. During the negative PDO phase, an opposite precipitation pattern is observed. This dipolar precipitation pattern during opposite PDO phases is associated with the atmospheric low frequency propagation from Equatorial Pacific through South America. Considering the mentioned findings, we propose in this study to verify the ability of the regional climatic model RegCM new version, RegCM4, in simulate the climatic impact over South America due to the extrapolated Amazon deforestation for the year 2050, for the distinct PDO phases. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA, CARLOS BATISTA; SILVA, MARIA ELISA SIQUEIRA; AMBRIZZI, TERCIO; PATUCCI, NATALIA NUNES; LIMA, BRUNA SIMOES; CORREA, WESLEY CAMPOS. Spatial distribution of spectral SST oscillations over the equatorial pacific in the period 1888-2014. INTERNATIONAL JOURNAL OF CLIMATOLOGY, v. 41, n. 7, p. 3841-3864, . (16/06654-0, 14/50848-9, 17/09308-9, 17/09659-6)
LIMBERGER, LEILA; SIQUEIRA SILVA, MARIA ELISA; PEREIRA, GABRIEL; CARDOZO, FRANCIELLE DA SILVA; VEROLA MATAVELI, GUILHERME AUGUSTO; LIMA, BRUNA SIMOES. Streamflow and precipitation trends in the Brazilian Amazon basin and their association with Pacific decadal oscillation and deforestation. THEORETICAL AND APPLIED CLIMATOLOGY, v. 146, n. 1-2, . (17/09308-9, 19/25701-8)
MATAVELI, GUILHERME AUGUSTO VEROLA; SILVA, MARIA ELISA SIQUEIRA; FRANCA, DANIELA DE AZEREDO; BRUNSELL, NATHANIEL ALAN; DE OLIVEIRA, GABRIEL; CARDOZO, FRANCIELLE DA SILVA; BERTANI, GABRIEL; PEREIRA, GABRIEL. Characterization and Trends of Fine Particulate Matter (PM2.5) Fire Emissions in the Brazilian Cerrado during 2002-2017. REMOTE SENSING, v. 11, n. 19, . (15/01389-4, 17/21164-2, 17/09308-9)
SILVA, MARIA ELISA SIQUEIRA; SILVA, CARLOS BATISTA; AMBRIZZI, TERCIO; DRUMOND, ANITA; PATUCCI, NATALIA NUNES. South America Climate During the 1970-2001 Pacific Decadal Oscillation Phases Based on Different Reanalysis Datasets. Frontiers in Earth Science, v. 7, . (08/57719-9, 17/09659-6, 17/09308-9)
SILVA, CARLOS BATISTA; SIQUEIRA SILVA, MARIA ELISA; KRUSCHE, NISIA; AMBRIZZI, TERCIO; FERREIRA, NELSON DE JESUS; DA SILVA DIAS, PEDRO LEITE. The analysis of global surface temperature wavelets from 1884 to 2014. THEORETICAL AND APPLIED CLIMATOLOGY, v. 136, n. 3-4, p. 1435-1451, . (15/50686-1, 17/09308-9)

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