CO2 measurements from 1970-2015 at Mauna Loa, Barrow, Samoa, and South Pole

Monthly averages of atmospheric CO2 measured at Mauna Loa, Barrow Alaska, American Samoa, and the South Pole from 1970 to 2015.  The annual cycle differs between sites, but the ever-increasing trend is the same at all sites.

Source:  NOAA 


SkS Resources that use this Graphic


Images


Creative Commons License The Skeptical Science website by Skeptical Science is licensed under a Creative Commons Attribution 3.0 Unported License.