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/permafrost-extent-in-the-nort
hern-hemisphere

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

  Permafrost extent in the Northern Hemisphere. (June 2007). In UNEP/GRID-Arendal Maps and Graphics Library. Retrieved 04:29, November 21, 2009 from http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere.

• MLA style

  "Permafrost extent in the Northern Hemisphere." UNEP/GRID-Arendal Maps and Graphics Library. June 2007. UNEP/GRID-Arendal. 21 Nov 2009 <http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere>.

• MHRA style

  UNEP/GRID-Arendal, 'Permafrost extent in the Northern Hemisphere', UNEP/GRID-Arendal Maps and Graphics Library, June 2007, <http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere> [Accessed 21 November 2009]

• Chicago style

  UNEP/GRID-Arendal, Permafrost extent in the Northern Hemisphere, UNEP/GRID-Arendal Maps and Graphics Library, http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere (Accessed 21 November 2009)

• CBE/CSE style

  UNEP/GRID-Arendal. Permafrost extent in the Northern Hemisphere [Internet]. UNEP/GRID-Arendal Maps and Graphics Library; June 2007 [cited 2009 Nov 21]. Available from: http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere.

• Bluebook style

  Permafrost extent in the Northern Hemisphere, http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere (Last visited November 21, 2009).

• Bluebook: Harvard JOLT style

  See UNEP/GRID Arendal Maps and Graphics Library, Permafrost extent in the Northern Hemisphere, http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere (Optional description here) (as of Nov. 21, 2009, 03:29 UTC).

• AMA style

  UNEP/GRID-Arendal. Permafrost extent in the Northern Hemisphere. UNEP/GRID-Arendal Maps and Graphics Library. June 2007. Available at: http://maps.grida.no/go/graphic/permafrost-extent-in-the-northern-hemisphere. Accessed November 21, 2009.