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Posts tagged Lake Nipigon

Lake Nipigon Near the Great Lakes, Canada

49.7N 88.6W

May 29th, 2013 Category: Lakes

Canada – May 28th, 2013

The Lake Nipigon basin lies north of the Lake Superior basin and was the hydrological link between glacial Lake Agassiz and the Great Lakes during part of the last deglaciation. A sequence of glaciolacustrine sediments, composed mainly of silt-clay rhythmites and sand, was deposited in the offshore waters of glacial Lake Nipigon by overflow from Lake Agassiz and meltwater from the retreating glacier margin. The timing of the linkage of Lake Agassiz with the Great Lakes, and the routing of meltwater to the oceans, is of considerable importance to global change (click here for more information).

Sediments in Black Bay of Lake Superior, USA and Canada

47.7N 86.9W

May 1st, 2012 Category: Lakes

USA and Canada - April 28th, 2012

Lake Superior, the largest of the five Great Lakes of North America, is bounded to the north by the Canadian province of Ontario and the U.S. state of Minnesota, and to the south by the U.S. states of Wisconsin and Michigan. Here, the lake appears mostly sediment free, with the exception of some greenish sediments visible in Black Bay, along the lake’s northern shores. Visible north of the bay is the rounded Lake Nipigon.

Lake Superior Perhaps Affected by Climate Change

47.7N 86.9W

April 4th, 2012 Category: Climate Change, Lakes

USA - April 3rd, 2012

Stretching across this image is Lake Superior, the largest of the five traditionally-demarcated Great Lakes of North America. Visible to its north, in the upper right corner, is the frozen Lake Nipigon.

Despite being the largest freshwater lake in the world by surface area, and the world’s third-largest freshwater lake by volume (it is deep enough to hold the combined water in all the other Great Lakes), over the last five years scientists have reported that Lake Superior is losing water and getting warmer. The changes to the lake could be signs of climate change, although scientists aren’t sure.

Superior’s level is at its lowest point in eight decades, and the average water temperature has surged 4.5 degrees since 1979, significantly above the 2.7-degree rise in the region’s air temperature during the same period.

Water levels also have receded on the other Great Lakes since the late 1990s. But the suddenness and severity of Superior’s changes worry many in the region. Shorelines are dozens of yards wider than usual, giving sunbathers wider beaches but also exposing mucky bottomlands and rotting vegetation.

 

Great Lakes of North Amerian Partially Surrounded by Snow

47.7N 86.9W

March 12th, 2012 Category: Lakes

USA - March 11th, 2012

This image focuses on the Great Lakes of North American, consisting of Lakes Superior, Michigan, Huron (from left to right), Erie (lower right corner), and Ontario (far right in the full image), they form the largest group of freshwater lakes on Earth comprising 21% of the world’s surface fresh water.

The lakes are shared by the USA and Canada. Of the five lakes, Lake Michigan is the only one that is located entirely within the United States. Here, snow can be seen dusting the landscape around the lakes, particularly on the Canadian side of the border. In the full image, a few bays in the northern parts of Lakes Superior, Michigan and Huron are frozen. Lake Nipigon, a smaller, rounded lake in Canada north of Lake Superior, is also covered in ice.

Frozen Lake Nipigon and Thawed Lake Superior, Canada

49.7N 88.6W

April 28th, 2011 Category: Lakes

USA - April 15th, 2011

The Canadian terrain north of Lake Superior is lightly dusted in snow in this spring image. While Lake Superior appears to have mostly thawed out, with the exception of a few bays along the northern shoreline, Lake Nipigon (small and rounded, above) is still completely frozen.

Lake Nipigon is the largest lake entirely within the boundaries of the Canadian province of Ontario (since four of the five Great Lakes are split between the US and Canada). It has a total area (including islands within the lake) of 4848 km2, and a maximum depth of 165 m.