Análise Das Séries Temporais De Precipitação Do Semiárido Paraibano Em Um Período De 100 Anos - 1911 A 2010 (Analysis Of The Time Series Of Precipitation Of The Paraiba Semi Arid In A Period Of 100 Years - 1911 To 2010)
DOI:
https://doi.org/10.26848/rbgf.v6i4.233058Keywords:
Pluviometria, Tendências, ODPAbstract
O estado da Paraíba apresenta cerca de 76% do seu território abrangido pela região semiárida do Nordeste brasileiro, incluindo 170 dos 223 municípios, dentre estes, estão os municípios de Antenor Navarro atual São João do Rio do Peixe, Princesa Isabel, Catolé do Rocha e Soledade que se sobressaem como importantes polos agrícolas e econômicos do estado, e que frequentemente são afetados pela alta variabilidade climática. Neste trabalho, foi analisado para estes 4 municípios a distribuição pluviométrica num período de cem anos (de 1911 até o ano de 2010) verificando as variações e/ou tendências nas suas séries temporais e investigando se existe uma relação entre a Oscilação Decenal do Pacífico (ODP) com a pluviometria anual das 4 localidades. A partir dos resultados obtidos, verificou-se que São João do Rio do Peixe tem a maior média pluviométrica, porém a tendência de sua série temporal apresentando-se negativa, em contraposto aos outros municípios que apresentaram médias pluviométricas menores, porém com tendências positivas. A investigação da influência da ODP na precipitação anual normalizada das séries analisadas mostrou que uma parcela da ODP influência na variabilidade pluviométrica, porém depende da sua intensidade e de outros fatores tais como o dipolo do Atlântico Tropical e eventos de El Niño/La Niña, indicando que maiores investigações devem ser feitas. A B S T R A C T The state of Paraíba has about 76% of its territory covered by the semi-arid region of Northeast Brazil, including 170 of the 223 municipalities, among these are the municipalities of Antenor Navarro current São João do Rio do Peixe, Princesa Isabel, Soledade and Catolé that stand out as important agricultural and economic centers of the state, which are often affected by high climatic variability. This work was analyzed for these four counties rainfall distribution over one hundred years (1911 until 2010) verifying the changes and / or trends in their series and investigating whether there is a relationship between the Pacific Decadal Oscillation ( ODP) with annual rainfall of 4 locations. From the results obtained, it was found that St. John's River Fish has the highest average rainfall, but the tendency of his series showed up negative in opposed to other municipalities that had lower average rainfall, but with positive trends. The investigation of the influence of PDO on normalized annual rainfall series analyzed, showed that a portion of the ODP influence on rainfall variability, but depends on their strength and other factors such as the Tropical Atlantic dipole and El Niño / La Niña, indicating that further investigations should be made.Downloads
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Copyright (c) 2013 Milla Nobrega de Menezes Costa, Carmem Terezinha Becker, José Ivaldo Barbosa de Brito

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