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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 observational data collected at surface stations and on certain ships for the period from 1968 to 2019 based on monthly mean data submitted to WDCGG by September 2020. Observational data and the results of related analysis indicate that concentrations 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 410.5±0.2 ppm, 1,877±2 ppb and 332.0±0.1 ppb in 2019, corresponding to 148, 260 and 123% of pre-industrial levels, respectively.

No Release Date Details PDF(EN)/HTML
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