Droughts in 2009/2010 and 2015/2016 increased tree mortality rate in Amazon forests , while productivity showed no consistent change; some authors reported a drop in productivity , while others found no significant changes . Nevertheless, the combined effect of increasing tree mortality with variations in growth results in a long- term decrease in C stocks in forest biomass, compromising the role of these forests as a C sink   . Under the RCP8.5 scenario for 2070, drought will increase the conversion of rainforest to savannah  . The transformation of rainforest into savannah will bring forth biodiversity loss and alterations in ecosystem functions and services  . In the Amazon basin, the synergistic effects of deforestation, fire, expansion of the agricultural frontier, infrastructure development, extractive activities, climate change and extreme events may exacerbate the risk of savannisation  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report