Journal metrics

Journal metrics

  • IF value: 4.252 IF 4.252
  • IF 5-year value: 4.890 IF 5-year 4.890
  • CiteScore value: 4.49 CiteScore 4.49
  • SNIP value: 1.539 SNIP 1.539
  • SJR value: 2.404 SJR 2.404
  • IPP value: 4.28 IPP 4.28
  • h5-index value: 40 h5-index 40
  • Scimago H index value: 51 Scimago H index 51
Discussion papers | Copyright
https://doi.org/10.5194/gmd-2018-164
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Development and technical paper 05 Jul 2018

Development and technical paper | 05 Jul 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

On the impact of recent developments of an atmospheric general circulation model on the simulation of CO2 transport

Marine Remaud, Frédéric Chevallier, Anne Cozic, Xin Lin, and Philippe Bousquet Marine Remaud et al.
  • Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Orme des Merisiers, Saint-Aubin, France

Abstract. The quality of the representation of greenhouse gas (GHG) transport in atmospheric General Circulation Models (GCMs) drives the potential of inverse systems to retrieve GHG surface fluxes to a large extent. In this work, the transport of CO2 is evaluated in the latest version of the LMDz GCM, developed for the Climate Model Intercomparison Project 6 (CMIP6) relative to the LMDz version developed for CMIP4. Several key changes have been implemented between the two versions; those include a more elaborate radiative scheme, new sub-grid scale parameterizations of convective and boundary layer processes, and a refined vertical resolution. We performed a set of simulations of LMDz with the different physical parameterizations, two different horizontal resolutions and different land surface schemes, in order to test the impact of those different configurations on the overall transport simulation. By modulating the intensity of vertical mixing, the physical parameterizations control the interhemispheric gradient and the amplitude of the seasonal cycle in the summer northern hemisphere, as emphasized by the comparison with observations at surface sites. However, the effect of the new parameterizations depends on the region considered, with a strong impact over South America (Brazil, Amazonian forest) but a smaller impact over Europe, Eastern Asia and North America. A finer horizontal resolution reduces the representation errors at observation sites near emission-hot spots or along the coastlines. In comparison, the sensitivities to the land surface model and to the increased vertical resolution are marginal.

Download & links
Marine Remaud et al.
Interactive discussion
Status: open (until 30 Aug 2018)
Status: open (until 30 Aug 2018)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Marine Remaud et al.
Marine Remaud et al.
Viewed
Total article views: 162 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
120 40 2 162 2 3
  • HTML: 120
  • PDF: 40
  • XML: 2
  • Total: 162
  • BibTeX: 2
  • EndNote: 3
Views and downloads (calculated since 05 Jul 2018)
Cumulative views and downloads (calculated since 05 Jul 2018)
Viewed (geographical distribution)
Total article views: 162 (including HTML, PDF, and XML) Thereof 162 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 15 Jul 2018
Publications Copernicus
Download
Short summary
We compare several versions of a global atmospheric transport model for the simulation of CO2. The representation of sub-grid-scale processes modulates the interhemispheric gradient and the amplitude of the seasonal cycle in the northern hemisphere. It has the largest impact over Brazil. Refining the horizontal resolution improves the simulation near emission hot-spots or along the coastlines. The sensitivities to the land surface model and to the increase vertical resolution are marginal.
We compare several versions of a global atmospheric transport model for the simulation of CO2....
Citation
Share