Temperatures colder than 50 degrees below zero in Northern Canada in past several weeks have caused a regrowth in the arctic sea ice.
Satellite images indicate that the expansion is almost 800,000 square miles compared to the coverage of the past three winters.
Forecasters at the Canadian Ice Service in Ottawa say the winter ice is 10 to 20 centimeters thicker than last year and that the ice could continue to expand through the remainder of this winter.
The arctic sea ice reached a record low in the Summer of 2007.