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/time-series-of-freeze-up-and-
break-up-dates-from-selected-northern-hemisphere-lakes-and-r
ivers-1846-1995

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

  Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995. (June 2007). In UNEP/GRID-Arendal Maps and Graphics Library. Retrieved 18:21, February 9, 2010 from http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995.

• MLA style

  "Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995." UNEP/GRID-Arendal Maps and Graphics Library. June 2007. UNEP/GRID-Arendal. 9 Feb 2010 <http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995>.

• MHRA style

  UNEP/GRID-Arendal, 'Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995', UNEP/GRID-Arendal Maps and Graphics Library, June 2007, <http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995> [Accessed 9 February 2010]

• Chicago style

  UNEP/GRID-Arendal, Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995, UNEP/GRID-Arendal Maps and Graphics Library, http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995 (Accessed 9 February 2010)

• CBE/CSE style

  UNEP/GRID-Arendal. Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995 [Internet]. UNEP/GRID-Arendal Maps and Graphics Library; June 2007 [cited 2010 Feb 9]. Available from: http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995.

• Bluebook style

  Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995, http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995 (Last visited February 9, 2010).

• Bluebook: Harvard JOLT style

  See UNEP/GRID Arendal Maps and Graphics Library, Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995, http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995 (Optional description here) (as of Feb. 9, 2010, 17:21 UTC).

• AMA style

  UNEP/GRID-Arendal. Time series of freeze-up and break-up dates from selected Northern Hemisphere lakes and rivers, 1846–1995. UNEP/GRID-Arendal Maps and Graphics Library. June 2007. Available at: http://maps.grida.no/go/graphic/time-series-of-freeze-up-and-break-up-dates-from-selected-northern-hemisphere-lakes-and-rivers-1846-1995. Accessed February 09, 2010.