State of Our Climate
​Atmospheric Greenhouse Gas Concentrations
Scripps daily CO2
Preindustrial GHG
​concentrations (WMO)

CO2 278 ppm ​
Methane ​722 ppb
Nitrous oxide​ 270 ppb
Atmospheric GHG concentrations tell us what the future higher 'committed' (locked in) global warming is. 
It is about another 70% of global temperature increase (IPCC AR5)​
WMO 2017 GHG Bulletin.  Rate of atmospheric CO2 increase is without any known precendent, and all three atmospheric GHG levels increased more than their 10 year annual average.
Global Carbon Budget Dec 2016 Methane Budget​
Dec 2016. Press release and links CO2 rate of atmospheric CO2
​increase is unprecedented in Earth history at 3 ppm/year 2015 and 2016.
Atmospheric CO2 concentration history: it is the highest in 5 million years.​
Dec 2016 GRL Methane radiative heat forcing is 25% higher. 
Nov 2016 Nonlinear climate sensitivity Climate sensitivity to CO2 X2  is ​4.88C (likely range, 4.29 to 5.44C per CO2 doubling for warm phases (as now).
2018 Very Strong Atmos Methane Growth FEEDBACK
Copernicus CAMS atmospheric satellite Charts
May 2020 Trends in global CO2 and total greenhouse gas emissions
PBL Netherlands Environmental Assessment Agency

Spring 2020 NOAA Greenhouse gas Index  CO2 equivalent  (includes other GHGs) 500 ppm