Environment Counts | WMO reports atmospheric CO2, CH4, N2O reach new highs in 2012 :
The latest observation from the WMO Global Atmosphere Watch (GAW) Program shows that CO2, CH4, and N2O concentrations continued to increase from 2011 to 2012.
|Global abundance in 2012||393.1ppm||1819ppb||325.1ppb|
|2012 abundance relative to 1750||141%||260%||120%|
|Mean annual increase during last decade||2.02ppm/yr||3.7ppb/yr||0.80ppb/yr|
The NOAA Annual Greenhouse Gas Index shows that from 1990 to 2012 radiative forcing by long-lived greenhouse gases increased by 32%, with CO2 accounting for 80% of this increase.
WMO Greenhouse Gas Bulletin 6 Nov 2013