August 10, 2017

From greenhouse gases to tropical cyclones, and from the South Pole to the Sahara, the 37th issue of the annual State of the Climate report catalogs the climate in 2016.

August 2, 2016

In the 2015 edition of the State of the Climate report, climate and biology experts wrote about some dramatic impacts of warming on life in the ocean.

July 13, 2014

The annual average concentration of carbon dioxide (CO2) in the atmosphere stood at 395.3 parts per million (ppm) in 2013—a 27 percent increase compared to conditions before the Industrial Revolution. On May 9, 2013, the daily average concentration of CO2 surpassed 400 ppm for the first time at the Mauna Loa Observatory in Hawaii.