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Winter is upon us and the cold is here to last, with double-digit negative temperatures forecasted for the next week. Is there a bright side to any of this? Not really. But we offer the tiniest of silver linings! To accompany this cold snap, we’re introducing a new short-term daily feature: Cold Facts.
Ice covered 9.4 per cent of the Great Lakes’ total surface by Wednesday of this week. That’s a fast start to freeze-up, with much more ice than there was on the same date a year ago (three per cent of the surface area) or two years ago (less than one per cent.)
A satellite called MODIS takes regular ice images.
Last year ice covered about 20 per cent of the lakes’ surface by midwinter and then receded. In some winters it can cover the lakes almost completely. The record was set in 1979, with 94.7 per cent of the surface frozen. They came close to that in both 2014 and 2015.
Source: Great Lakes Surface Environmental Analysis
tspears@postmedia.com
twitter.com/TomSpears1
查看原文...
Ice covered 9.4 per cent of the Great Lakes’ total surface by Wednesday of this week. That’s a fast start to freeze-up, with much more ice than there was on the same date a year ago (three per cent of the surface area) or two years ago (less than one per cent.)
A satellite called MODIS takes regular ice images.
Last year ice covered about 20 per cent of the lakes’ surface by midwinter and then receded. In some winters it can cover the lakes almost completely. The record was set in 1979, with 94.7 per cent of the surface frozen. They came close to that in both 2014 and 2015.
Source: Great Lakes Surface Environmental Analysis
tspears@postmedia.com
twitter.com/TomSpears1
查看原文...
