The Lesser Antilles in the Caribbean including St Lucia and Grenada, and French Polynesia could be severely affected by water shortage
Many islands already face acute water scarcity due to limited catchment areas and demand from growing populations.
But precise forecasts for these small archipelago and atoll nations are in short supply, as they do not typically register in global climate models.
âUp until now if you lived in the middle of the ocean on a small island, you were without the information that rest of us on big land masses have of what to expect in the futureâ, said Kristopher Karnauskas at the University of Colorado-Boulder and author of the study.
The study calculates future levels of evaporation and combines them with precipitation forecasts. Karnauskas said that would help planners adapt infrastructure and agriculture to future imbalances in water.