Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case Hugo Ahlenius, UNEP/GRID-Arendal)
Arctic Land-Surface Air Temperature: 1930-2004 Gridded Monthly Time Series, v1.03, by Matsuura and Willmott et al, University of Delaware: http://climate.geog.udel.edu/~climate/
CAFF Secretariat. 2010. CAFF area.
Uploaded on Tuesday 21 Feb 2012
The Arctic, as defined by summer temperature
Hugo Ahlenius, UNEP/GRID-Arendal
The Arctic is a region not easily delineated by one boundary or definition - it includes the Arctic Ocean and the land areas around it, including Greenland, Eurasia and North America. A climate definition of the Arctic is the 10 centigrade July isotherm. This limit roughly coincides with the treeline and represents a change in growing conditions for plants. As visible in the map, this also includes mountainous and alpine areas. The map also presents the Arctic circle at 66°33′ North - the limit of the midnight sun and polar night. The Conservation of Arctic Flora and Fauna (CAFF) area presented in the map is the area covered by CAFF working group under the Arctic Council.