18 Jul 2022
18 Jul 2022
Status: this preprint is open for discussion.

Technical note: The CAMS greenhouse gas reanalysis from 2003 to 2020

Anna Agusti-Panareda1, Jérôme Barré1, Sébastien Massart1, Antje Inness1, Ilse Aben2, Melanie Ades1, Bianca C. Baier3,4, Gianpaolo Balsamo1, Tobias Borsdorff2, Nicolas Bousserez1, Souhail Boussetta1, Michael Buchwitz5, Luca Cantarello1, Cyril Crevoisier6, Richard Engelen1, Henk Eskes7, Johannes Flemming1, Sébastien Garrigues1, Otto Hasekamp2, Vincent Huijnen7, Luke Jones1, Zak Kipling1, Bavo Langerock8, Joe McNorton1, Nicolas Meilhac6, Stefan Noel5, Mark Parrington1, Vincent-Henri Peuch1, Michel Ramonet9, Miha Ratzinger1, Maximilian Reuter5, Roberto Ribas1, Martin Suttie1, Colm Sweeney4, Jérôme Tarniewicz9, and Lianghai Wu10 Anna Agusti-Panareda et al.
  • 1European Centre for Medium Range Weather Forecasts, Shenfield Park, Reading RG2 9AX, United Kingdom
  • 2SRON Netherlands Institute for Space Research, Utrecht, the Netherlands
  • 3Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA
  • 4NOAA, Global Monitoring Laboratory, Boulder, CO, USA
  • 5Institute of Environmental Physics (IUP), University of Bremen, 28334 Bremen, Germany
  • 6Laboratoire de Météorologie Dynamique (LMD/IPSL), CNRS, Ecole polytechnique, 91128 Palaiseau Cedex, France
  • 7Royal Netherlands Meteorological Institute, Utrechtseweg 297, NL-3731 GA De Bilt, Netherlands
  • 8Royal Belgian Institute for Space Aeronomy, Avenue Circulaire 3, 1180 Uccle, Belgium
  • 9Laboratoire des Sciences du Climat et de l’Environnement (LSCE-IPSL), CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
  • 10Flemish Institute for Technological Research (VITO), Remote Sensing Unit, Boeretang 200, B-2400 Mol, Belgium

Abstract. The Copernicus Atmosphere Monitoring Service has recently produced a greenhouse gases reanalysis (version egg4) that covers almost two decades from 2003 to 2020 and will be extended in the future. This reanalysis dataset includes carbon dioxide (CO2) and methane (CH4). The reanalysis procedure combines model data with satellite data into a globally complete and consistent dataset using the European Centre for Medium-range Weather Forecasts’ Integrated Forecasting System (IFS). This dataset has been carefully evaluated against independent observations to ensure validity and point out deficiencies to the user. The greenhouse gas reanalysis can be used to examine the impact of atmospheric greenhouse gases concentrations on climate change, such as global and regional climate radiative forcing, assess intercontinental transport, and also serve as boundary conditions for regional simulations, among other applications and scientific studies. The caveats associated with changes in assimilated observations and fixed underlying emissions are highlighted, as well as their impact on the estimation of trends and annual growth rates of these long-lived greenhouse gases.

Anna Agusti-Panareda et al.

Status: open (until 29 Aug 2022)

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  • RC1: 'Comment on egusphere-2022-283', Anonymous Referee #2, 09 Aug 2022 reply

Anna Agusti-Panareda et al.

Data sets

CAMS global greenhouse gas reanalysis (EGG4) Copernicus Atmosphere Monitoring Service

Anna Agusti-Panareda et al.


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Short summary
We present a global dataset of atmospheric CO2 and CH4, the two most important human-made greenhouse gases, which covers almost two decades (2003–2020). It is produced by combining satellite data of CO2 and CH4 with a weather and air composition prediction model, and it has been carefully evaluated against independent observations to ensure validity and point out deficiencies to the user. This dataset can be used for scientific studies in the field of climate change and the global carbon cycle.