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WDCGG Data Submission and Dissemination Guide (PDF 1.2Mbyte)

WDCGG leaflet (PDF 2.7MByte, July 2008)

Global mean mole fractions

Updated : 2014/09/09 (Next update scheduled for Nov. 2015)

Contents of this page correspond to WMO Greenhouse Gas Bulletin No. 10 : September 2014.
(http://www.wmo.int/pages/prog/arep/gaw/ghg/GHGbulletin.html)

CONTENTS:

NOTICE:
Global mean mole fractions data can be updated retrospectively due to
recalibration or other quality control procedures of the source data.
Usually expected changes are minor, but WDCGG recommends using the latest release.

Global annual mean mole fractions

Download csv data files
  CO2
CH4
N2O
Data
(csv file)
Mole fraction,
Uncertainty
Mole fraction,
Uncertainty
Mole fraction,
Uncertainty

  CO2 [ppm] CH4 [ppb] N2O [ppb]
MeanUnc. MeanUnc. MeanUnc.
  1980     -     -     -     -     300.6     0.1  
  1981     -     -     -     -     301.2     0.1  
  1982     -     -     -     -     302.6     0.1  
  1983     -     -     -     -     303.1     0.1  
  1984     344.3     0.1     1653     1     303.6     0.1  
  1985     345.7     0.1     1666     1     304.0     0.1  
  1986     347.2     0.1     1678     1     304.9     0.1  
  1987     349.0     0.1     1691     2     305.6     0.1  
  1988     351.3     0.1     1702     2     306.5     0.1  
  1989     353.0     0.1     1713     1     307.5     0.1  
  1990     354.1     0.1     1723     1     308.6     0.1  
  1991     355.4     0.1     1734     1     309.3     0.1  
  1992     356.1     0.1     1742     1     309.9     0.1  
  1993     357.0     0.1     1745     1     310.2     0.1  
  1994     358.5     0.1     1750     1     310.8     0.1  
  1995     360.3     0.1     1757     1     311.4     0.1  
  1996     362.0     0.1     1761     2     312.1     0.1  
  1997     363.3     0.1     1764     2     313.1     0.1  
  1998     366.0     0.1     1773     1     313.9     0.1  
  1999     368.0     0.1     1781     1     314.7     0.1  
  2000     369.4     0.1     1782     1     315.6     0.1  
  2001     370.9     0.1     1781     1     316.4     0.1  
  2002     372.9     0.1     1783     1     317.0     0.1  
  2003     375.3     0.1     1786     2     317.7     0.1  
  2004     377.1     0.1     1786     2     318.4     0.1  
  2005     379.2     0.1     1785     2     319.1     0.1  
  2006     381.3     0.1     1785     2     320.0     0.1  
  2007     383.1     0.1     1791     1     320.7     0.1  
  2008     385.2     0.1     1798     1     321.6     0.1  
  2009     386.8     0.1     1803     1     322.3     0.1  
  2010     388.9     0.1     1808     2     323.1     0.1  
  2011     390.9     0.1     1813     2     324.2     0.1  
  2012     393.1     0.1     1818     2     325.1     0.1  
  2013     396.0     0.1     1824     2     325.9     0.1  
CO2

CH4

N2O

References ( about uncertainty ) :
A Technical Memorandum for uncertainty information about the global mean values in the WMO Greenhouse Gas Bulletins


Global monthly mean mole fractions

Download csv data files
  CO2
CH4
N2O
Data
(csv file)
Mole fraction,
Growth rate
Mole fraction,
Growth rate
Mole fraction,
Growth rate

  CO2
CH4
N2O
Mole fraction
Growth rate

References:
Y. Tsutsumi, K. Mori, T. Hirahara, M. Ikegami, and T. J. Conway, (2009),
Technical Report of Global Analysis Method for Major Greenhouse Gases by the World Data Center for Greenhouse Gases,GAW Report No.184


Global analysis in WDCGG

Since 2006, WMO has published an annual GREENHOUSE GAS BULLETIN, which reports the latest atmospheric abundances and their rates of change for the most important long-lived greenhouse gases (LLGHGs) — carbon dioxide, methane, nitrous oxide, CFC-12, and CFC-11 — and provides a summary of the contributions of the lesser gases. Submission of the original measurement data from WMO GAW partners all over the world make it possible for WDCGG to perform global analyses of the major greenhouse gases as the official data centre of the WMO/GAW Programme in support of GHG Bulletin preparation.

This page provides access to globally averaged data and plots of CO2, CH4 and N2O that are used in the Bulletins. Content of this page is updated annually based on newly submitted measurement data.

The global analysis in WDCGG is conducted after careful screening of measurement data and only using data from stations using WMO traceable scales. The details of the global analysis method are given in GAW report No.184(1).

NOAA/ESRL, the largest data contributor to WDCGG, also calculates globally averaged mole fractions of major greenhouse gases(2). The major difference of the global analysis methods between NOAA and WDCGG is the site selection process. NOAA/ESRL traditionally uses greenhouse gas data recorded in the Marine Boundary Layer (MBL) to represent the background atmosphere. In addition to MBL data, the WDCGG uses data from inland stations(3) after careful evaluation of their representativeness and traceability to WMO GAW standard scales.

Because of this difference in site selection, globally averaged mole fractions of CO2 calculated by the WDCGG are about 0.4 ppm greater than those from NOAA/ESRL. However CO2 trends and interannual variability are similar for both approaches.

References:
(1) Y. Tsutsumi, K. Mori, T. Hirahara, M. Ikegami, and T. J. Conway, (2009),
Technical Report of Global Analysis Method for Major Greenhouse Gases by the World Data Center for Greenhouse Gases
(2) Trends in Atmospheric Carbon Dioxide by NOAA/ESRL
http://www.esrl.noaa.gov/gmd/ccgg/trends/global.html
(3) Station distribution map for the WDCGG global analysis


Information about citation

Figures and data in this page can be freely used with a citation, for instance:
"WMO Greenhouse Gas Bulletin, No.10, 2014."


List of contributors

The global analyses can be impossible without the data contributors who conduct accurate measurements and submit the precious data to the WDCGG. The following table contains the contributors of the data actually have been used in the global analyses after screening process, for last three years.
Organization Acronym Country/Territory
Advanced Global Atmospheric Gases Experiment Science Team(AGAGE) AGAGE science team
Center for Environmental Science in Saitama Saitama Japan
China Meteorological Administration CMA China
Commonwealth Bureau of Meteorology BoM Australia
Commonwealth Scientific and Industrial Research Organisation CSIRO Australia
Czech Hydrometeorological Institute CHMI Czech Republic
Department of Applied Environmental Science, Stockholm University ITM Sweden
Direcion Nacional del Antartico- Istituto Antartico Argentino, Buenos Aires, Argentina DNA-IAA Argentina
Earth System Research Laboratory, NOAA NOAA/ESRL United States of America
Environment Canada EC Canada
Federal Environment Agency Austria UBA Austria
Federal Environmental Agency Germany UBA Germany
Finnish Meteorological Institute FMI Finland
Hong Kong Observatory HKO Hong Kong, China
Hungarian Meteorological Service HMS Hungary
International Center for Earth Sciences - CNR, Institute of Acoustics and Sensors CNR-ICES Italy
Italian Air Force Meteorological Service IAFMS Italy
Italian National Agency for New Technology, Energy and the Environment ENEA Italy
Izana Atmospheric Research Center,Meteorological State Agency of Spain AEMET Spain
Japan Meteorological Agency JMA Japan
Laboratoire des Sciences du Climat et de l'Environnement LSCE France
Main Geophysical Observatory MGO Russian Federation
Meteorological Research Institute, JMA MRI Japan
National Institute for Environmental Studies NIES Japan
National Institute of Environmental Research NIER Republic of Korea
National Institute of Meteorological Research, KMA NIMR Republic of Korea
National Institute of Water & Atmospheric Research Ltd. NIWA New Zealand
National Research Council, Institute of Atmospheric Sciences and Climate ISAC Italy
Physics Institute, Climate and Environmental Physics, University of Bern KUP Switzerland
Ricerca sul Sistema Energetico - RSE S.p.A. RSE Italy
South African Weather Service SAWS South Africa
Swiss Federal Laboratories for Materials Testing and Research Empa Switzerland


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in cooperation with the World Meteorological Organization
(Created : 2013/07/17    Updated : 2014/09/09)

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