Climatic characterization and temporal analysis of rainfall in the municipality of cruzeiro do sul-ac, Brazil

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Abstract

The Climatological Water Budget (CWB) determined by the Thornthwaite and Matter (1955) allows the temporal visualization of the variables that compose the climate, thus allowing the climatic characterization of a region. There-fore, this work aimed at identifying and quantifying the months of water surplus and deficit through CWB to characte-rize the climate for the municipality of Cruzeiro do Sul-AC, Brazil, and analyze the temporal distribution of rainfall for the municipality. We used daily precipitation and temperature values and procedures to fill in the database. We calcu-lated the potential evapotranspiration (ETP) using the Hargreaves Samani method (1985). Subsequently, we determined the periods of soil water storage (SWS), water deficiency (DEF), and water surplus (SUR) on a monthly scale. The climate of Cruzeiro do Sul, located in the northern region of Brazil, was characterized according to the Thornthwaite (1955) as B1rA'a' for a AWC of 140 mm, that is, a humid climate with annual rainfall average of 2227 mm and real evapotranspiration of 1660 mm, with small water deficiency in the months from June to October, with no thermal defi-ciency, and summer concentrated in three months with an average air temperature of 25 °C ranging between 18 °C and 32 °C.

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de Araujo, E. S., de Almeida, M. P., Leite, K. N., Silva, J. R. D. S., de Araújo, E. A., & de Sousa, G. G. (2020). Climatic characterization and temporal analysis of rainfall in the municipality of cruzeiro do sul-ac, Brazil. Revista Brasileira de Meteorologia, 35(4), 577–584. https://doi.org/10.1590/0102-77863540061

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