With new uncertainties about greenhouse gas emissions, research is more vital than ever.

Since the mid-1980s, the percentage of precipitation that becomes streamflow in the Upper Rio Grande watershed has fallen more steeply than at any point in at least 445 years.

A new analysis has found that the amount of dissolved oxygen contained in the water – an important measure of ocean health – has been declining for more than 20 years.

When engineers design roads, bridges, and other types of transportation infrastructure, they need to account for changing weather patterns.

The crippling wintertime droughts that struck California from 2013 to 2015, as well as this year's unusually wet California winter, appear to be associated with the same phenomenon: a distinctive wave pattern that emerges in the upper atmosphere and circles the globe.