Implications of climate change on water availability in a seasonally dry tropical forest in the Northeast of Brazil

Abstract

Climate change is already affecting life on Earth and mitigation measures must be taken, which require proper iden - tification of the regions most vulnerable to these changes. This study assesses the impact of climate change on water availability (water surplus, water deficit and precipitation minus evapotranspiration) and climate classification across the Caatinga biome, located within the Brazilian semiarid region. To obtain the water surplus and water deficit, the water balance of Thornthwaite & Matther (1955) was applied considering the current scenario (historical series from 1961 to 2015); the optimistic scenario, considering the Representative Concentration Pathway (RCP) for a radiative forcing of 4.5 W.m -2 (RCP4.5), i