Identificação e caracterização de ambientes homogêneos de eventos de seca/umidade com base em simulações climáticas regionais
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Data
2012
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Resumo
The objective of this study was to identify and characterize homogeneous environments based on the probability of drought/
wet occurrence in the central-northern Brazil, considering Rondônia, Mato Grosso, Goiás and Tocantins States. The drought
index denominated the moisture anomaly Z-index (Z-index) was used. The input climate data for the drought index was gener-
ated by the regional climate model RegCM3 for the period from 1975 to 1989. As result of cluster analysis, it was identified
13 homogeneous environments. These environments were characterized based on the probability of drought/wet, relative
density of drought/wet occurrence, annual rainfall variability and probability of drought occurrence during the rainy season
(October to March). The Mato Grosso State had the highest number of homogeneous environments and the environment 11,
located at southwest of this State had the highest probability of drought occurrence, 9%. The environment 10, located at
the extreme east of Goiás State, showed the lowest median for the total annual rainfall. The climatic event with the highest
probability of occurrence in the study area is close to normal or normality moisture.
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Palavras-chave
Seca, Modelo climático regional, Índice de anomalia de umidade de Palmer (Z-index), Drought, Palmer moisture anomaly index (Z-index), Regional climate model
Citação
FERNANDES, Diego Simões; KRUGER, Luiz Fernando; HEINEMANN, Alexandre Bryan; ROCHA, Rosmeri Porfírio da. Identificação e caracterização de ambientes homogêneos de eventos de seca/umidade com base em simulações climáticas regionais. Bragantia, Campinas, v. 71, n. 2, p. 290-298, 2012.