Alterações na temperatura e umidade do ar e precipitação em três localidades do Estado da Paraíba.

Abstract

In this work, the changes in temperature and relative humidity and precipitation caused by the impact of urbanization in the cities of João Pessoa, Campina Grande and São Gonçalo were evaluated. In the development of the research were used data of temperature and relative humidity and precipitation, corresponding to the period from 1963 to 1998, granted by the Laboratory of Meteorology Water Resources and Remote Sensing of Paraíba and the National Institute of Meteorology, aiming at show the variations of these parameters, which are fundamental to climate characterization urban. Thus, bugfixes and corrections of temperature and relative humidity and precipitation; After these corrections, the period of The data (1963-98) was divided into subperiods corresponding to the submultiples of that period, that is, distributed into series of 6, 9 and 12 years. Then, the trends of temperature and relative humidity and precipitation were evaluated by moving averages obtained by the arithmetic sequences. The results were analyzed considering the sub periods according to the series already mentioned; for purposes of Comparison of these temperature and relative humidity and precipitation averages between the subperiods, a statistical analysis was performed by the Student's test / method and the population growth data of the cities were used to characterize the urban growth. The results showed that in João Pessoa, Campina Grande and São Gonçalo there was a significant increase in air temperature of approximately 0.6 ° C, 0.9 ° C and 0.6 ° C, respectively in the 1987-98 subperiods. 1987-98 and throughout the period (1963-98). The relative humidity of the air was virtually unchanged in João Pessoa, having decreased significantly from 79.6% to 74.4% in the 1993-98 cm Campina Grande sub-period and approximately 6% in the 1975-98 cm São Gonçalo sub-period. . Regarding precipitation, it was found that there was a decrease in João Pessoa, in the 1987-98 sub-period, of approximately 300 mm; in Campina Grande there were reductions in precipitation ranging from 140 mm to 180 mm, depending on the series used; precipitation decreased significantly in São Gonçalo, ranging from 130 mm to 170 mm, also due to the use of the series. With respect to climate, it was found that according to the method proposed by Koppen, there was practically no change, so it can be considered as climate change.