Map of northern hemisphere permafrost extent

Permafrost is land in which the mean annual temperature has been below freezing for at least two years.
Originally uploaded in Integrate:Teaching for Sustainability:InTeGrate Modules:Modeling Earth Systems:Student Materials.

Image 51184 is a 906 by 1388 pixel WebP
Uploaded: Nov20 14

Last Modified: 2016-08-17 11:14:29
Permanent URL: https://serc.carleton.edu/download/images/51184/map_northern_hemisphere_permaf.webp

The file is referred to in 1 page

Unit 7 Reading
https://serc.carleton.edu/integrate/teaching_materials/earth_modeling/student_materials/unit7_article1.html

Provenance
This map comes from a USGS website: http://pubs.usgs.gov/pp/p1386a/images/gallery-5/full-res/pp1386a5-fig03.jpg linked to from the following page: http://www.usgs.gov/blogs/features/usgs_top_story/permafrost-its-chill/

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and maybe reused freely without restriction.

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