A few storms found their way to the drought-stricken California coast late this winter, but they barely made a dent in the state's huge water deficits. As the North Pacific winter storm season recedes, there is little likelihood for substantial drought recovery.

Federal law may protect the river habitat in the name of endangered fish, but on land, grapevines are king. This article is the first in a two-part series about how scientists are helping find compromise amid local tensions over water supplies.

Persistent cold temperatures in the Midwest this winter almost completely frozen over many of the Great Lakes. The Great Lakes Environmental Research Laboratory (GLERL) reported that 88 percent of the Great Lakes were frozen as of mid-February.

Among the questions triggered by the entrapment of a Russian ship near Antarctica on Christmas Eve were whether the ice conditions were out of the ordinary, and, if so, whether long-term climate change was playing a role.

The Arctic Oscillation describes simultaneous, geographically “choreographed” shifts in multiple features of the polar vortex: air pressure, temperature, and the location and strength of the jet stream. They all follow the hemisphere-wide oscillation of atmospheric mass back and forth between the Arctic and the middle latitudes, sort of like water sloshing in a bowl.

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