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North America's northernmost lake affected by global warmingContact: Jean-François Huppé
jean-francois.huppe@dap.ulaval.ca
418-656-7785
Université Laval
North America's northernmost lake affected by global warming
| Quote: | Quebec City, September 26, 2007—Analyses conducted by researchers from Université Laval’s Center for Northern Studies reveal that the continent’s northernmost lake is affected by climate change. In an article to be published in the September 28 edition of Geophysical Research Letters, the international research team led by Université Laval scientists Warwick Vincent and Reinhard Pienitz reports that aquatic life in Ward Hunt Lake, a body of water located on a small island north of Ellesmere Island in the Canadian Arctic, has undergone major transformations within the last two centuries. The speed and range of these transformations—unprecedented in the lake’s last 8,000 years—suggest that climate change related to human activity could be at the source of this phenomenon.
The researchers’ conclusions are based on the analysis of a sediment core extracted in the center of Ward Hunt Lake in August 2003. This 18 centimeter long sediment core containing algae pigments and diatom remnants was used by the researchers as a biological archive in order to determine the diversity and abundance of aquatic life-forms in the lake over the last 8,450 years. |
http://www.eurekalert.org/pub_releases/2007-09/ul-nan092607.php
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