CO2 Now


What the world needs to watch

Global warming is mainly the result of CO2 levels rising in the Earth’s atmosphere. Both atmospheric CO2 and climate change are accelerating. Climate scientists say we have years, not decades, to stabilize CO2 and other greenhouse gases.

To help the world succeed, makes it easy to see the most current CO2 level and what it means. So, use this site and keep an eye on CO2.  Invite others to do the same. Then we can do more to send CO2 in the right direction.

Watch CO2 now and know the score on global warming, practically in real time.

Annual Data | Atmospheric CO2 PDF Print E-mail

annual mean co2

Annual Atmospheric CO2 DataThe 2014 average annual concentration of CO2 in the atmosphere (Mauna Loa Observatory) is 398.55 parts per million (ppm).   The 2013 average is 396.48 ppm.  

For the past decade (2005-2014) the average annual increase is 2.1 ppm per year.  The average for the prior decade (1995-2004) is 1.9 ppm per year.    Annual data for 2014 was first posted January 6, 2015, by NOAA-ESRL in the United States. 

Since the 1958 start of high-precision instrument measurements of CO2 in the atmosphere, the annual mean concentration of CO2 has only increased from one year to the next.   The CO2 data below provide a simple view of the annual trend. 

Year        CO2 (ppm)           Notes

2014        398.55

2013        396.48

2012        393.82

2011        391.63

2010       389.85                   

2009       387.37                   Copenhagen Accord

2008       385.59                  

2007       383.76                

2006       381.90 

1997       363.71                   Kyoto Protocol

1992       356.38                   Earth Summit in Rio de Janeiro

1987       349.16                   The last year when the annual CO2 level was less than 350 ppm

1959       315.97                   The first year with a full year of instrument data 


Source Annual CO2 Data:   NOAA-ESRL Data File Created January 6, 2015


More Information:

Annual and monthly data for atmospheric CO2  |  1958 - present  |  MLO / Scripps & NOAA

Accelerating rise of atmospheric CO2

Seasonal fluctuation in atmospheric CO2

Monthly data for atmospheric CO2


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Klima font by Matthew Anderson


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