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A repercussao em funcao do aquecimento global tem causado preocupacao em todo planeta, pelas acoes de causa e consequencia que apontam perante o possivel aumento de temperatura. Porem, existe a hipotese da situacao-problema em que as mudancas climaticas podem ser resultantes naturais da variabilidade climatica. A pesquisa tem por objetivo verificar se ha algum indicio de mudanca climatica referente as realidades proximas do municipio de Juazeiro-BA (09°25’00’’S; 40°30’00’’W), encravado no Semiarido Nordestino. Foram analisados dados mensais e anuais de precipitacao, temperatura media, temperatura minima e temperatura maxima da estacao agrometeorologica de Mandacaru – BA. Os mesmos foram agrupados em decadas e determinados segundo as medidas de tendencia central (media e mediana), alem do desvio padrao (medida de dispersao). Os resultados foram apresentados para a cidade segundo as figuras de medias mensais e anuais (1975-2010) e medias anuais por decadas. Pode-se concluir com base nos resultados que diante dos parâmetros analisados houve um indicativo de variabilidade natural que caracteriza o Semiarido Brasileiro, ou seja, nao foi possivel observar alteracoes que estejam vinculadas as mudancas climaticas como indicado pela literatura. Palavras - chave: Mudancas Climaticas; Semiarido Nordestino; Juazeiro. Global Warming or Natural Climate Variability on Juazeiro Microregion in Bahia State? ABSTRACT The repercussions about global warming have caused concern around the globe, by the actions of cause and effect, that pointing to the possibility of increase in global temperatures. However, there is the chance that all observed changes are just the result of natural climate variability. The research aims to verify if there is any indication regarding the realities of climate changes near Juazeiro city in Bahia State, embedded in the semiarid region of Brazil. It were analyzed the monthly and annual precipitation, average temperature, minimum temperature and maximum temperature of agrometeorological station. It was grouped in decades according in to certain measures of central tendency (mean and median) and standard deviation (measure of dispersion). The results were presented according to the figures of monthly and annual average between 1975 and 2010 and decade averages. It was concluded, based on the results, that the analyzed parameters were an indication of natural variability that characterizes the Brazilian Semiarid, i. e., it was not possible to observed changes that are linked to climate changes as indicated by the literature. Keywords: Climate Change; Northeast Semiarid; Juazeiro.

Aquecimento Global ou Variabilidade Climática Natural na Microrregião de Juazeiro - BA? (Global Warming or Natural Climate Variability on Juazeiro Microregion in Bahia State?)