Índices de Detecção de Mudanças Climáticas Derivados da Precipitação Pluviométrica e das Temperaturas em Recife-PE (Detection Indexes Derived from Climate Change Rainfall and Temperatures in Recife-PE)
DOI:
https://doi.org/10.26848/rbgf.v5i1.232793Keywords:
Mudança climática, precipitação pluviométrica, temperaturas, RClimdex.Abstract
Este trabalho objetiva verificar as tendências dos índices de detecção de mudanças climáticas derivados da precipitação pluviométrica e das temperaturas máximas e mínimas em Recife, a partir do software RClimdex, com o propósito de averiguar se houve mudanças no comportamento dos elementos climáticos analisados. Foram utilizados dados diários da precipitação pluviométrica e das temperaturas (máximas e mínimas) no período de 1961 a 2008 em Recife, cedidos pelo INMET. Os resultados derivados da precipitação não apresentaram tendências significativas de redução. Por outro lado, diagnosticou-se aumento da frequência de eventos extremos de chuvas a partir da década de 80, com chuvas diárias superiores a 100 mm. Em relação aos índices associados às temperaturas, todos apontam tendências positivas, indicando aumento das temperaturas máximas e mínimas em torno de 1oC nos 47 anos analisados, com aumento da frequência de dias e noites mais quentes, constatando-se aumento de ondas de calor na região. Apesar dos resultados apresentarem mudanças nos índices climáticos, estas alterações não necessariamente estão associadas a uma mudança climática global, mas principalmente as ações antropogências através da modificação do espaço.
Palavras-chave: Mudança climática, precipitação pluviométrica, temperaturas, RClimdex.
Detection Indexes Derived from Climate Change Rainfall and Temperatures in Recife-PE
ABSTRACT
This study aims to determine the detection rates of climate change derived from rainfall and maximum and minimum temperatures in Recife, through the RClimdex software, with the purpose of investigate whether there were changes in the behavior of climatic elements analyzed. It used daily data of rainfall and temperatures (maximum and minimum) in the period 1961 to 2008 in Recife, assigned by INMET. The results derived from the precipitation did not show significant trends of reduction. On the other hand, was diagnosed with increasing frequency of extreme rainfall events from the 1980, with daily rainfall exceeding 100 mm. Compared to the temperatures associated with, all indicate positive trends, indicating an increase of the maximum and minimum temperatures around 1 °C in 47 years analyzed, with increased frequency of hot days and nights, it noted the increase in heat waves in the region . Although the results present changes in climate indices, these changes are not necessarily associated with global climate change, but mainly through the actions of anthropogenic modification of the space.
Keywords: Climate change, rainfall, temperatures, RClimdex.
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Copyright (c) 2012 Werônica Meira Souza, Pedro Vieira Azevedo
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