CO2 Now

Atmospheric CO2 is accelerating upward from decade to decade.   

For the past ten years, the average annual rate of increase is 2.07 parts per million (ppm).   This rate of increase is more than double the increase in the 1960s.   

See the table below.  

Decade                 Total Increase        Annual Rate of Increase

2003   2012              20.74 ppm                     2.07 ppm per year 

1993  2002               16.73 ppm                     1.67 ppm per year 

1983   1992                15.24 ppm                     1.52 ppm per year 

1973   1982               13.68 ppm                     1.37 ppm per year 

1963   1972                 9.00 ppm                     0.90 ppm per year 

Source Data:

Data is calculated by CO2Now using measurements of the concentration of CO2 in the atmosphere (Mauna Loa Observatory) that were made and posted by the Scripps Institution of Oceanography's CO2 Program.  

Related Information:

CO2Now  |  Data for atmospheric CO2 (Mauna Loa Observatory)

CO2Now  |  Global carbon emissions

CO2Now  |  Annual CO2 concentrations

CO2Now  |  Global temperature

CO2Now  |  The Climate Sheet:  More "Big Picture" Data