Global water resources face new challenges in the coming decades that entail a renewed role for water policy analysis. Scarcity, growing populations, and massive water development projects have led to keen competition over water resources. Climate change is expected to further reduce the availability of water resources and increase the variability in water supplies in some regions...

The Operational Land Imager (OLI) on Landsat 8 acquired this image of an interesting sea ice edge on June 21, 2014, the first day of summer. The scene shows a part of the Amundsen Gulf, between Canada’s Victoria Island and the mainland, that opens to the Beaufort Sea to the west. The gulf forms the westernmost section of the Northwest Passage, which opened during the low-ice year of 2007, but remained ice-bound in 2014.