Impacto do Plantio de Soja e do Oceano Pacífico Equatorial na Precipitação e Temperatura na Cidade de Chapadinha-MA (Impact of Soybean Planting and Equatorial Pacific Ocean Temperature and Precipitation in the City of Chapadinha-MA)
| Autor: | Valner da Silva Nogueira, Magaly de Fatima Correia, Virgínia de Fátima Bezerra Nogueira |
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| Jazyk: | portugalština |
| Rok vydání: | 2012 |
| Předmět: |
lcsh:GE1-350
Atmospheric Science Geography Planning and Development Climatologia impacto ambiental soja variabilidade interanual Sowing Mineralogy Forestry Pacific ocean Geophysics Geography Precipitation Computers in Earth Sciences lcsh:GB3-5030 lcsh:Physical geography lcsh:Environmental sciences Earth-Surface Processes General Environmental Science |
| Zdroj: | Revista Brasileira de Geografia Física, Vol 5, Iss 3, Pp 708-724 (2012) |
| ISSN: | 1984-2295 |
| Popis: | O Estado do Maranhao possui uma economia voltada para a agropecuaria que engloba atividades relevantes como a criacao de bovinos e o cultivo de arroz. Recentemente ocorreram mudancas importantes no sistema de producao agricola pela introducao da soja substituindo areas de cerrado. Neste trabalho e feita uma analise da variabilidade climatica na regiao de Chapadinha MA utilizando dados mensais de precipitacao e das temperaturas maximas e minimas. Na quantificacao do impacto da soja na variabilidade da precipitacao, as analises foram concentradas no periodo de 1977 a 2009. A tecnica da analise de variância e o teste t -Student foram usadas como principais ferramentas estatisticas na analise dos dados. Os resultados mostram que as alteracoes na cobertura e uso da terra afetaram o clima local. As principais mudancas foram observadas na temperatura minima. Palavras - chave: Climatologia, impacto ambiental, soja, variabilidade interanual Impact of Soybean Planting and Equatorial Pacific Ocean Temperature and Precipitation in the City of Chapadinha-MA ABSTRACT The State of Maranhao has an economy facing agriculture encompassing relevant activities such as cattle and rice cultivation. Recently there were major changes in agricultural production system by introducing soy replacing grassland areas. This paper presents an analysis of climate variability in the region of MA Chapadinha using monthly data of precipitation and maximum and minimum temperatures. In quantifying the impact of soy on rainfall variability, the analyzes were concentrated in the period from 1977 to 2009. The technique of analysis of variance and t-Student test were used as the main statistical tools for data analysis. The results show that changes in land use and cover affected the local climate. The major changes were observed in the minimum temperature. Keywords: Climatology, environmental impact, soybeans, interannual variability |
| Databáze: | OpenAIRE |
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