October 22, 2009

Climate scientists discuss what they know about global climate change today, and how they know it.

August 30, 2009

The Southern Oscillation Index tracks differences in air pressure between the eastern and western sides of the tropical Pacific.

April 19, 2017

Temperatures measured on land and at sea for more than a century show that Earth's globally averaged surface temperature is rising.

March 15, 2017

A new analysis allows non-experts to view 2016 and year-to-date climate data for thousands of U.S. locations.