Subarctic lakes drying up at fastest rates since last 200 years

   Nov 28, 1:47 pm

Washington, Nov 28 (ANI): A new study suggests that subarctic lakes are drying up at a rate that has not been witnesses in 200 years.

The decrease in snowfall observed in recent years in Canada's subarctic regions has led to worrisome desiccation of the regions' lakes.

This is the conclusion arrived at by researchers from Universite Laval, Wilfrid Laurier University, Brock University and the University of Waterloo.

Researchers came to this conclusion after studying 70 lakes near Old Crow, Yukon, and Churchill, Manitoba . Most of the lakes studied are less than one metre deep.

According to the analysis, more than half of those located on relatively flat terrain and surrounded by scrubby vegetation show signs of desiccation.

The problem stems chiefly from a decline in meltwater; for instance, from 2010 to 2012 average winter precipitation in Churchill decreased by 76 mm compared to the averages recorded from 1971 to 2000.

The drying of some lakes, which first became visible to the naked eye in 2010, was even more pronounced in summer 2013.

"With this type of lake, precipitation in the form of snow represents 30 percent to 50 percent of the annual water supply," study lead author, Frederic Bouchard, a postdoctoral fellow at Universite Laval's Department of Geography and the Centre for Northern Studies, said.

The kind of desiccation seen by the researchers is without precedent in 200 years.

Isotopic analyses conducted on the remains of phytoplankton accumulated in lakebed sediment show that the lakes have maintained water balance for 200 years. This stability was abruptly disrupted a few years ago.

The study is published online in the scientific journal Geophysical Research Letters. (ANI)

Climate engineering may be only way to save coral reefs May 26, 6:21 pm
Washington, May 26 (ANI): A new study has indicated that geoengineering of the climate may be the only way to save coral reefs from mass bleaching.
Full Story
Time to explore Venus with 'inflatable aircraft' May 26, 5:04 pm
Washington, May 26 (ANI): Exploring Venus will now seem to be easier with Northrop Grumman's new idea of an inflatable aircraft.
Full Story
Madagascar's `colourful` panther chameleon actually comprises of 11 different species May 26, 3:11 pm
Washington, May 26 (ANI): A new study has brought panther chameleon into limelight in Madagascar which is actually composed of eleven different species.
Full Story
Scientist warns of humans-turned-robots taking over the world May 26, 2:25 pm
London, May 26 (ANI): A top boffin has warned that in the future, chances are that the world will be ruled by humans who have turned into cyborgs.
Full Story
Comments

LATEST STORIES
TOP VIDEO STORIES
PHOTO GALLERY