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A partir das series climatologicas normais de 1931-1960 e 1961-1990 dos elementos meteorologicos realizaram-se os calculos do balanco hidrico climatologico, a classificacao e as analises das indicacoes de mudancas climaticas no municipio de Sobral, estado do Ceara, utilizando O programa do BHnorm elaborado em planilhas eletronicas no pacote Excel por Sentelhas et al. (1999) e a metodologia de calculo do Balanco Hidrico Climatico de Thornthwaite & Mather (1955) e a classificacao de Thornthwaite (1955), com o objetivo de contribuir para a sustentabilidade do homem no campo. Identificou-se que o clima da area de estudo classifica-se como Megatermico semiarido e o tipo climatico passou do tipo dw 2 w 2 d’ para dw 2 Dd’ com reducoes da temperatura minima e com oscilacoes de -0,1 a -0,8oC e temperatura maxima com variacoes de -1,7 a 2,1oC. A umidade relativa do ar ocorreu flutuacoes positivas de 0,3 a 3,4%. A evapotranspiracao potencial oscilou em -71,0 mm em relacao aos periodos para o mes de outubro. Os indices de umidade; aridez e hidricos demonstraram valores de 28,6%, -23,9% e -47,5%, respectivamente. Observou-se que todas estas variabilidades ocorreram devido aos efeitos causados pelo homem na estrutura da cidade. Palavras-chave: Meteorologia. Balanco Hidrico Climatico. Clima. Classification and Analysis of Indications of Climate Change in the City of Sobral – Ceara ABSTRACT From the series 1931-1960 climatological normal from 1961-1990 and meteorological elements were carried out calculations of the climatic water balance, classification and analysis of the indications of climate change in the city of Sobral, Ceara State, using the program BHnorm prepared in Excel spreadsheets in the package by Sentelhas et al. (1999) and the methodology of calculation of the Climatic Water Balance of Thornthwaite & Mather (1955) and the classification of Thornthwaite (1955), in order to contribute to the sustainability of the man in the field. It was found that the climate of the study area is classified as megathermal semiarid climate and the type has type dw2w2d 'to dw2Dd' with reductions in the minimum temperature fluctuations and from -0.1 to -0.8 o C and maximum temperature variations with 2.1 to -1.7 ° C. The relative humidity was positive fluctuations of 0.3 to 3.4%. The potential evapotranspiration fluctuated -71.0 mm for the periods for the month of October. The contents of moisture, drought and water showed values ​​of 28.6% -23.9% and -47.5%, respectively. It was observed that all these effects occurred due to variability caused by man in the structure of the city. Keywords: Meteorology. Climatic Water Balance. Climate.

revista brasileira de geografia física

Classificação e Análises das Indicações de Mudanças Climáticas no Município de Sobral - Ceará (Classification and Analysis of Indications of Climate Change in the City of Sobral – Ceará)