Instrumental measurements, proxy data, climate model projections

Pattern in coral
January 23, 2014

NOAA is an agency that enriches life through science. From the surface of the sun to the bottom of the ocean, NOAA advances scientific understanding of Earth's environment, climate, and weather.

Intermountain Power Plant
January 23, 2014

Yes, human activities have increased the abundance of heat-trapping gases in the atmosphere, which a large majority of climate scientists agree is the main reason for the 1.5°F (0.85°C) rise in average global temperature since 1880.

Map depicting length of heat wave season
October 4, 2018

From heat waves to heavy rain, the National Climate Assessment's recently updated collection of indicators shows how climate is changing.

July 24, 2017

Temperatures in the 90s and little to no rainfall have triggered exceptional drought in parts of the Northern Plains. Crops have been ravaged and fire risk is high in Montana, Wyoming, and parts of North and South Dakota.