Earth Snapshot RSS Feed Twitter

Posts tagged Great Bear Lake

Global Warming and Sea Ice by Northern Canada

69.9N 120.1W

June 13th, 2013 Category: Climate Change MODISTerra

Canada – June 12th, 2013

Bodies of water in the Arctic, in Canada’s Northwest Territories and the province of Nunavut are covered in ice: the Great Bear Lake (below), Amundsen Gulf (upper left) and Queen Maud Gulf (upper right). Most of the sea ice breaks up in July during a normal year, with some areas only breaking up in August. Here, ice can be seen breaking up in Amundsen Gulf, near the left edge.

Ongoing changes in the climate of the Arctic include rising temperatures, loss of sea ice, and melting of the Greenland ice sheet. The Arctic ocean will likely be free of summer sea ice before the year 2100. Because of the amplified response of the Arctic to global warming, it is often seen as a high-sensitivity indicator of climate change.

Fires in Alberta, Canada, South of Great Slave Lake

58.4N 117.4W

July 18th, 2012 Category: Fires

USA – July 13th, 2012

Fires in the Canadian province of Alberta, just south of the border with the Northwest Territories (above), can be seen near the left edge and center of this image. A thick cloud of smoke released by the fires covers much of the lower half of the image. Visible in the Northwest Territories above the image center is the Great Slave Lake, tan and green from sediments. Upon opening the full image, the Great Bear Lake can also be seen, further north.

Mackenzie River Passing Great Bear Lake, Canada

66.1N 120.3W

July 6th, 2010 Category: Lakes, Rivers

Canada - June 2nd, 2010

Canada - June 2nd, 2010

The Mackenzie River carries brown sediments past the frozen Great Bear Lake (upper right) in Canada’s Northwest Territories, on its way towards the Beaufort Sea and Arctic Ocean. It is the longest river in Canada at 1,738 kilometres (1,080 mi).

Many other lakes dot the landscape near the river. Some are blue, having thawed during the warmer summer months, while many others are still frozen. The Mackenzie River itself generally freezes over in October and begins to thaw in May, meaning it is only navigable for approximately five months of the year.

Great Bear Lake and Great Slave Lake, Canada

61.6N 113.7W

July 3rd, 2010 Category: Lakes, Sediments

Canada - June 1st, 2010

Canada - June 1st, 2010

Many lakes, large and small, are dotted across Canada’s Northwest Territories. The largest two are the Great Bear Lake, upper left corner, and the Great Slave Lake, center.

The Great Bear Lake is the largest lake entirely within Canada (Lake Superior and Lake Huron straddling the Canada-US border are larger), the third largest in North America, and the seventh largest in the world. The lake has a surface area of 31,153 km² (12,028 mi²) and a total volume of 2,236 km³ (536 mi³). Here, it is still frozen over with ice and appears white in color.

The Great Slave Lake is the second-largest lake in the Northwest Territories, the deepest lake in North America at 614 m, and the ninth-largest lake in the world. It covers an area of 27200 km2 in the southern part of the territory. Its volume is 2090 km3. Some ice is visible on the surface, particularly in the northern and western parts, while the eastern portion shows colorful brown and green sediments.

Great Bear Lake on the Arctic Circle, Canada – May 28th, 2010

66.0N 121W

May 28th, 2010 Category: Image of the day, Lakes

Canada - April 27th, 2010

Canada - April 27th, 2010

Great Bear Lake, covered in ice, to the right, is the largest lake entirely within Canada (Lake Superior and Lake Huron straddling the Canada-US border are larger). It is the third largest in North America, and the seventh largest in the world.

The lake is situated on the Arctic Circle between 65 and 67 degrees of northern latitude and between 118 and 123 degrees western longitude, 186 m (610 ft) above sea level. It empties through the Great Bear River (Sahtúdé) into the Mackenzie River.

Great Bear Lake has a surface area of 31,153 km2 (12,028 sq mi) and a total volume of 2,236 km3 (536 cu mi). Its maximum depth is 446 m (1,463 ft) and its average depth 71.7 m (235 ft). The total shoreline is 2,719 km (1,690 mi) and the total catchment area of the lake is 114,717 km2 (44,292 sq mi).