Iceland’s Eyjafjallajökull Volcano roared to life on April 14, 2010, injecting billowing clouds of steam and volcanic ash into the atmosphere.
Instruments located high atop NOAA’s Boulder Atmospheric Observatory tower help scientists track carbon emissions and air quality in Colorado.
Improved computer models help scientists understand Earth’s ocean.
What Scientists Know Today About Climate
October 22, 2009
The Southern Oscillation Index tracks differences in air pressure between the eastern and western sides of the tropical Pacific.
Earth's surface temperature has risen about 2 degrees Fahrenheit since the start of the NOAA record in 1850. It may seem like a small change, but it's a tremendous increase in stored heat.
Earth had another record-warm month. It was also the second-wettest January on record.
In a record going back to 1850, Earth hasn't had a year colder than the 20th-century average since 1976—almost half a century.
From record-high summer heat to the greening of the Arctic, this collection of images highlights several key "vital signs" of the Arctic.
An explainer about the international climate meeting known as “COP.”