Using the graphics and referring to them is encouraged, and please use them in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include this link:
http://maps.grida.no/go/graphic/atmospheric-concentrations-of
-carbon-dioxide-co2-mauna-loa-or-keeling-curve

Please give the cartographer/designer/author credit (in this case Hugo Ahlenius, UNEP/GRID-Arendal) and give full recognition to the data sources used in the graphic.

Feel free to feature links to this page, or other pages on this site, but please refrain from linking to the actual graphics files directly, if possible (i.e. inline linking).

Re-publishing the full resolution version of the graphics (high-quality png and pdf), un-modified, as digital files for download requires approval from UNEP/GRID-Arendal (use this form).

We do appreciate if you have the possibility to send us a copy of any printed publications featuring our graphics. See the UNEP/GRID-Arendal contact page for mailing address.

Here are some suggestions for the the proper citation, in a number of styles that can just be copied and pasted into any documents. This is based on the template provided by Wikipedia. For reference to any printed material, please see the details of the collection or collections this graphic is published in, which may be published in paper format.

• APA style

  Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve. (February 2008). In UNEP/GRID-Arendal Maps and Graphics Library. Retrieved 17:22, February 8, 2012 from http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve.

• MLA style

  "Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve." UNEP/GRID-Arendal Maps and Graphics Library. February 2008. UNEP/GRID-Arendal. 8 Feb 2012 <http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve>.

• MHRA style

  UNEP/GRID-Arendal, 'Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve', UNEP/GRID-Arendal Maps and Graphics Library, February 2008, <http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve> [Accessed 8 February 2012]

• Chicago style

  UNEP/GRID-Arendal, Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve, UNEP/GRID-Arendal Maps and Graphics Library, http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve (Accessed 8 February 2012)

• CBE/CSE style

  UNEP/GRID-Arendal. Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve [Internet]. UNEP/GRID-Arendal Maps and Graphics Library; February 2008 [cited 2012 Feb 8]. Available from: http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve.

• Bluebook style

  Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve, http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve (Last visited February 8, 2012).

• Bluebook: Harvard JOLT style

  See UNEP/GRID Arendal Maps and Graphics Library, Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve, http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve (Optional description here) (as of Feb. 8, 2012, 16:22 UTC).

• AMA style

  UNEP/GRID-Arendal. Atmospheric concentrations of carbon dioxide (CO2) - Mauna Loa or Keeling curve. UNEP/GRID-Arendal Maps and Graphics Library. February 2008. Available at: http://maps.grida.no/go/graphic/atmospheric-concentrations-of-carbon-dioxide-co2-mauna-loa-or-keeling-curve. Accessed February 08, 2012.