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)
Based on Magnuson, J.J., Robertson, D.M., Wynne, R.H., Benson, B.J., Livingstone, D.M., Arai, T., Assel, R.A., Barry, R.D., Card, V., Kuusisto, E., Granin, N.G., Prowse, T.D., Stewart K.M., and Vuglinski, V.S. (2000). Ice cover phenologies of lakes and rivers in the Northern Hemisphere and climate warming. Science, 289(5485), 1743-1746