Dinâmica do uso e ocupação da terra e seu efeito na temperatura e na precipitação no bioma Caatinga (Floresta Tropical Sazonamente Seca) - Brasil

Land use and occupation dynamics and its effect on temperature and precipitation in the Caatinga biome (Seasonally Dry Tropical Forest) – Brazil

Abstract

The objective of this work was to evaluate the influence of the dynamics of land use and occupation in the Caatinga on precipitation and temperature. To determine the temperature, precipitation, number of days without rain and of the areas occupied by the classes, the Google Earth Engine platform was used. Precipitation variability was assessed by the Rainfall Anomaly Index. Trend analyzes were performed using the Mann-Kendall test. Pearson's Correlation Coefficient was calculated between climate variables and land use and land cover classes. The dynamics of land use and occupation between 1991 and 2020 demonstrated an advance in anthropized areas. The number of consecutive days without rain, which between 1981 and 1990 had its highest value in September, in subsequent decades, was observed in October. For temperature, an upward trend was observed between 1991 and 2020. It was not possible to establish a relationship between land use and occupation and precipitation. The reduction in the area occupied by larger formations increases the temperature in the region. The change in land use and occupation did not affect precipitation in the region but had a direct impact on air temperature.