Freshwater, the most essential of our natural resources, is particularly susceptible to changes in climate. At CCSR, on-going research focuses on improving our understanding of the water-climate link. This work includes basin-level analyses of climate information from the Coupled Model Intercomparison Project Phase 5 (CMIP5) archives for key basins in Africa, Latin America, Arab States and Europe (funded by the United Nations Development Programme). Another key research project looks at the global trade of virtual water and its susceptibility to extreme weather events and shifts in climate. Other work at CCSR involves understanding the impacts of irrigation and groundwater on the climate system. Together these projects will advance our understanding of the connections between water resources and climate, ultimately informing policy-making efforts that promote sustainability.