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 site the following: CAFF. 2010. Arctic Biodiversity Trends: Selected indicators of change
Labrecque, S., Lacelle, D., Duguay, C., Lauriol, B. & Hawkings, J. 2009. Contemporary (1951) Evolution of Lakes in the Old Crow Basin, Northern Yukon, Canada: Remote Sensing, Numerical Modelling, and Stable Isotope Analysis. Arctic. 62:225-238.
Uploaded on Tuesday 21 Feb 2012
Disappearing lakes - Old Crow Basin, Canada (1951-2001)
Hugo Ahlenius, GRID-Arendal & CAFF
The Arctic contains a variety of types of lakes but overall, it is thermokarst lakes and ponds that are the most abundant and productive aquatic ecosystems in the Arctic. They are found extensively in the lowland regions of western and northern Alaska, Canada and Siberia. These (i.e., thaw) lakes are most commonly formed by the thaw of ice-rich permafrost, which leads to the collapse of ground levels and ponding of surface water in the depression. Continued thawing of the permafrost can lead to the drainage and eventual disappearance of these lakes, as can erosion and lake coalescence. This figure presents the trends in the Old Crow Flats Basin of Northern Canada.