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Some of the land includes alpine tundra, arctic tundra, taiga, lake and wetland complexes, large river deltas, open grass and sedge meadows, and previously glaciated mountains and river valleys. Rolling, vegetated sand dunes were formed by the last retreat of the glaciers .
The arctic tundra often lacks sunshine. Summer days last 24 hours, yet the sun remains low on the horizon. During the winter, the opposite occurs, and the entire landscape is dark.
The ecoregion stretches 1,200 km from the Great Slave Lake in the south to the mouth of the Mackenzie River at the Arctic Ocean in the north. [2] The river valley is one of broad lowlands, with plateaus on the edges and highlands in the southwest. The median elevation is 348 metres (1,142 ft), and the highest point is 2,208 metres (7,244 ft). [3]
Subarctic and tundra climates prevail in north Canada and north Alaska, and desert and semiarid conditions are found in interior regions cut off by high mountains from rain-bearing westerly winds. [12] However, most of the continent has temperate climates very favorable to settlement and agriculture.
The Arctic is rapidly changing from the climate crisis, with no "new normal," scientists warn.. Wildfires and permafrost thaw are making the tundra emit more carbon than it absorbs. From beaver ...
We tag along with a group from PBI to search for bears on the sub-Arctic tundra - just a few miles from town. The team travels in a tundra buggy, a type of off-road bus with huge tyres.
The Peary caribou (Rangifer arcticus pearyi) is a subspecies of caribou found in the High Arctic islands of Nunavut and the Northwest Territories in Canada. They are the smallest of the North American caribou, with the females weighing an average of 60 kg (130 lb) and the males 110 kg (240 lb). [3]
With wildfires and increased warming, scientists say the Arctic’s tundra is now a carbon source. The region had been a carbon sink for thousands of years (NOAA Climate.gov; Arctic Report)