Aplicação do teste sazonal de Mann-Kendall na análise de tendência da temperatura e umidade relativa do ar – Goiânia-GO: série histórica 1961 a 2008

Abstract

In winter, the characteristic climate of Goiânia is related to synoptic conditions and in this period corresponds mainly to the influence of the central action of the South Atlantic Anticyclone, individualized air mass while Tropical Atlantic (Ta). This system provides atmospheric atmospheric stability, sunny day and no precipitation. Heatstroke reaches its maximum, around 270 hours in the month (CAMPOS, et al., 2003). This implies that, with temperatures that Goiânia In winter, the characteristic climate of Goiânia is related to synoptic conditions and in this period mainly corresponds to the Influence of the central action of the South Atlantic Anticyclone, individualized air mass while Tropical Atlantic (Ta). This system provides atmospheric atmospheric stability, sunny day and no precipitation. Heatstroke reaches its maximum, around 270 hours in the month (CAMPOS, et al., 2003). This implies that, Goiânia that shows temperatures during this time accompanied by the situation of low relative humidity. However, the activities of society have brought about change in the behavior of climate, particularly in relation to air temperature and relative humidity. Since the conditions offered by the action of atmospheric systems operating in South America, the physicogeographical, stands out here continentality effect, Goiânia is naturally conducive to elevated temperature and low humidity. Upon removal of vegetation, growth of the city, sealing surfaces, vehicle traffic automores, among others, of course which represents climatic condition of hot, dry weather through human intervention there is an power increase in temperature and relative humidity decrease in the air. Thus, this paper presents analysis hipóstes weather trend, in order to contribute to the understanding of the trends indicated for the parameters of the climate and temperature of the air relative humidity, to the city of Goiânia-GO. It was contemplated series of 48 years, using data from climatological station main Goiânia, linked to the network of the National Institute of Meteorology (INMET), 10th District of Meteorology Goiás, Tocantins (10th DISME), located at 16 ° 40'S and 49 ° 15 'W and 741.48 m above sea level for the period 1961 to 2008. The tests of hypotheses were applied simple linear regression analysis and nonparametric Mann-Kendall Seasonal according to Hirsch et al. (1982). The results show forthe the last 48 years, a positive trend towards air temperature range, between 0.8 to 2.4 °C in air power increase temperature (maximum and minimum) and negative trend series for relative humidity, indicating a possible decrease of 6,9%.