Evidências de mudanças climáticas na região de transição Amazônia-Cerrado no Estado do Maranhão

Abstract

The Amazon-Savanna transition zone is characterized by high diversity of ecosystems, biodiversity and climatic conditions. This work aims to investigate evidences of climate change on precipitation and temperature in the Maranhão state. The climatological normal data from 1977 to 2014 provided from 12 meteorological stations of National Meteorological Institute distributed in state area was used to build the climatic time series. This dataset was divided in two groups according to climate stations, dry and rain seasons. The Mann-Kendall test was applied to detect increase and decrease trends regarding complete time series and both, dry and rain season series. The results show a strong climate change in air temperature. In the amazon biome, Bacabal and Zé Doca stations registered increase and decrease tendencies, respectively. In the savanna biome, in Carolina and Colinas stations presented increase and decrease tendencies, respectively. The results presented in this work shows that climate change occurred differently in Maranhão state, not influenced necessarily by biome.