Dinâmica espaço-temporal das anomalias de precipitação em uma região semiárida, Nordeste do Brasil

Abstract

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Climate Indices-Based Analysis of Rainfall Spatiotemporal Variability in Pernambuco State, Brazil

“…Furthermore, our results agree with those found by Santos et al (2014) [84], Alves et al (2016) [85], Mendonça (2016) [86], Pereira et al (2017) [83], Silva et al (2018) [87], and Costa et al (2021) [82], who in their studies in the state of Pernambuco proved that the rainy season in the mesoregions of Metropolitana do Recife, Zona da Mata, and Agreste Pernambucano occurs mainly in June and July and that in the mesoregions of Sertão Pernambucano and Sertão do São Francisco, the rains are predominant in February and March. According to Araújo et al (2009) [88], the month of March is the most significant in terms of rainfall in the state's interior due to the ITCZ's activity, which reaches its maximum in that month when it becomes prominent in the region.…”

“…It is also worth noting that, in the state of Pernambuco, most years with below-average rainfall were associated with the El Niño phenomenon and/or the positive phase of the SST Anomaly Gradient in the Tropical Atlantic [82]. According to Pereira et al (2017), [83] in the driest years, several municipalities in the state, especially those located in the mesoregions of Agreste, Sertão, and Sertão do São Francisco, declared a state of public calamity and/or emergency, where rural areas were the ones that suffered the greatest impacts, with great losses in agriculture and livestock.…”

“…Based on the results presented, it was found that the annual rainfall in the state of Pernambuco is not uniformly distributed. According to Souza et al (2021) [89], this result may be related to the fact that the spatial variability of the climate considerably influences the average PCI of a given location. In their studies, Sangüesa et al (2018) [52] found that the annual PCI tends to decrease by up to 30% when moving from an arid/semi-arid zone to a humid/sub-humid zone.…”