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WMO WDCGG Data Summary reports the annual results of global analyses of greenhouse and some related gas data submitted to WDCGG by contributing organizations.

The latest Data Summary covers monthly mean observational data collected at surface stations and on certain ships for the period from 1968 to 2021 and submitted to WDCGG by September 2022. Observational data and the results of related analysis indicate that mole fractions of major greenhouse gases (CO2, CH4, N2O, SF6 and certain HCFCs and HFCs) are increasing, while those of certain ozone-depleting substances (e.g., CFCs) are not. The globally averaged mole fractions of CO2, CH4 and N2O reached new highs of 415.7±0.2 ppm, 1908±2 ppb and 334.5±0.1 ppb in 2021, corresponding to 149, 262 and 124% of pre-industrial levels, respectively.

No Release Date Details PDF(EN)/HTML
WDCGG No.47 August 2023 103 pp., analysis based on data submitted by September 2022 PDF(11.3 MB)
WDCGG No.46 August 2022 105 pp., analysis based on data submitted by September 2021 PDF(10.2 MB)
WDCGG No.45 September 2021 97 pp., analysis based on data submitted by September 2020 PDF(16.3 MB)
WDCGG No.44 November 2020 95 pp., analysis based on data submitted by September 2019
Corrected on 18 March 2021. Please see the errata information for details.
PDF(9.7 MB)
WDCGG No.43 March 2020 91 pp., analysis based on data submitted by September 2018
Corrected on 3 June 2020. Please see the errata information for details.
PDF(9.4 MB)
WDCGG No.42 October 2018 97 pp., analysis based on data submitted by September 2017
Corrected on 19 February 2019. Please see the errata information for details.
PDF(10.4 MB)
WDCGG No.41 March 2017 95 pp., analysis based on data submitted by September 2016
Corrected on 31 August 2018. Please see the errata information for details.
PDF(11.8 MB)
WDCGG No.40 March 2016 134 pp., analysis based on data submitted by November 2015 PDF(20.8 MB)
WDCGG No.39 March 2015 130 pp., analysis based on data submitted by November 2014, except for the greenhouse gas species CO2, CH4, N2O, SF6 and halocarbons, for which the submission period ended in July 2014. PDF(23.4 MB)
WDCGG No.38 March 2014 116 pp., analysis based on data submitted by November 2013
Corrected on 24 June 2014. Please see the errata information for details.
PDF(19.2 MB)
WDCGG No.37 March 2013 112 pp., analysis based on data submitted by October 2012 PDF(31.7 MB)
WDCGG No.36 March 2012 100 pp., analysis based on data submitted by November 2011 PDF(10.9 MB)
WDCGG No.35 March 2011 98 pp., analysis based on data submitted by November 2010 PDF(9.4 MB)
WDCGG No.34 March 2010 95 pp., analysis based on data submitted by September 2009 PDF(7.5 MB)
WDCGG No.33 March 2009 99 pp., analysis based on data submitted by September 2008 PDF(13.9 MB)
WDCGG No.32 March 2008 95 pp., analysis based on data submitted by September 2007 PDF(15.2 MB)
WDCGG No.31 March 2007 96 pp., analysis based on data submitted by September 2006 PDF(12.9 MB)
WDCGG No.30 March 2006 88 pp., analysis based on data submitted by September 2005 PDF(10.7 MB)
WDCGG No.29 March 2005 85 pp., analysis based on data submitted by December 2004 PDF(14.4 MB)
WDCGG No.28 March 2004 98 pp., analysis based on data submitted by December 2003 HTML
WDCGG No.27 March 2003 92 pp., analysis based on data submitted by September 2002 HTML
WDCGG No.26 March 2002 92 pp., analysis based on data submitted by December 2001 HTML
WDCGG No.22 March 2000 84 pp., analysis based on data submitted by June 1999 HTML
WDCGG No.15 March 1998 223 pp., analysis based on data submitted by January 1998
WDCGG No.8 March 1995 94 pp., analysis based on data in the period from 1972 to 1993

 Animation

The latitude distribution of mole fractions in the figure on the left includes all observational data collected at surface stations and on particular ships for 1984 – 2021 based on monthly mean valid data submitted to WDCGG by September 2022. Values not on the WMO scale are not converted to this scale.
Globally averaged mole fractions in the figure on the right are based on WMO Greenhouse Gas Bulletin No.18 of 2022. The values used are from selected stations as described in the Bulletin.

These animations indicate increasing mole fractions for CO2, CH4 and N2O, with globally averaged figures reaching new greenhouse gas highs of 415.7±0.2 ppm, 1908±2 ppb and 334.5±0.1 ppb in 2021, respectively.

CO2
CH4
N2O
*These animations are not included in the Summary.
All data contribute to analysis on greenhouse gas distribution. See GAW report No. 184 for details of data selection and calculation.