Greenhouse Gases

Atmospheric Greenhouse Gas Abundances

Carbon Dioxide (CO2)

Long-Term Annual Means with IPCC Scenarios

Figure in PDF. Figure with IPCC 2013 comparisons in PDF. Data: CO2 (Data through 2019, Last updated 2020/03/06)

Recent Mauna Loa CO2

Figure in PDF (Data through August 2020, Last updated 2020/09/11)
Data Source: Dr. Pieter Tans, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends/) and Dr. Ralph Keeling, Scripps Institution of Oceanography (scrippsco2.ucsd.edu/)

Recent Global CO2

Figure in PDF (Data through July 2020, Last updated 2020/10/06)

Data Source: Ed Dlugokencky and Pieter Tans, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends/) and Dr. Ralph Keeling, Scripps Institution of Oceanography (scrippsco2.ucsd.edu/)

ERL (2013) Fig. 2 and PLOS ONE (2013) Fig. 6 Update

Annnual change of CO2 (globally since 1980 and at Mauna Loa before that) compared with the annual increase of the global mean surface temperature and Nino 3.4 temperature data. Figure in PDF (Data through July 2020, Last updated 2020/10/06)

"Burden" (2017) Fig. 6 Update

Left: Annnual change of CO2. Right: Correlation between the annual change of CO2 (using only global mean data) and annual change of the global mean surface temperature. Figure in PDF (Data through October 2019, Last updated 2020/01/13)

CO2 Emissions and Airborne Fraction

PDF, another version in PDF (last updated 2020/06/24)

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Methane (CH4)

Long-Term Annual Means with IPCC Scenarios

Figure in PDF. Figure with IPCC 2007 and 2013 comparisons in PDF. Data: CH4 (Data through 2019, Last updated 2020/04/06)

Recent Global CH4

Figure in PDF (Data through June 2020, Last updated 2020/10/06)

Data Source: Ed Dlugokencky, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends_ch4/)

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Nitrous Oxide (N2O)

Long-Term Annual Means with IPCC Scenarios

Figure in PDF. Figure with IPCC 2007 and 2013 comparisons in PDF. Data: N2O (Data through 2019, Last updated 2019/04/23)

Recent Global N2O

Figure in PDF (Data through June 2020, Last updated 2020/10/06)
Data Source: 1978-2000, NOAA/GMD Halocarbon Network. 2001-2020, Ed Dlugokencky, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends_n2o/)

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Other Trace Gases


mixing ratios: 1900-1990 (2016/07/02), 1992-2018 (2019/12/10), 2015-2100 (2018/03/26).

Figure in PDF. (Last modifies 2019/12/10)
forcings: 1900-1990 (2016/07/09), 1992-2018 (2019/12/10) 2015-2100 (2016/07/04).

Recent Forcing and Its Growtha

Figure in PDF (Data through 2018, Last updated 2019/12/12)

Data source: NOAA ESRL HATS Total_Cl_Br, NOAA GMD HATS SF6 pages.

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Greenhouse Gas Forcing Compared with Future Scenarios

Figure also available in PDF. Data through 2018. (Last modified: 2019/04/21)

Digital data for Scenarios A, B and C. The original figure is Fig. 2 in Hansen, Fung, Lacis, et al. 1988, "Global Climate Changes as Forecast by Goddard Institute for Space Studies Three-Dimensional Model", JGR 93, 9341-9364.

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Greenhouse Gas Forcing Growth Rates

The curves are 5-year running means with annual means for 2018 and 2019.
Figure also available in PDF. (Last modified: 2020/04/24)

The original figure is Fig. 4 in Hansen and Sato 2004, "Greenhouse gas growth rates" PNAS 101, 16109-16114.