Tundra hummocks

Tundra hummocks

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Credit: SIMON FRASER/SCIENCE PHOTO LIBRARY

Caption: Tundra hummocks against a background of mountains behind an inlet of the sea. Tundra is the flat, treeless Arctic region that lies between the polar regions of perpetual snow and ice and the northern limit of tree growth. The hummocks are a feature of the tundra, closely related to the presence of permanently frozen subsoil (permafrost). In the brief, warm summer weather, the surface layer of the permafrost thaws, leading to a short flowering season. The vegetation consists mostly of mosses, lichens and small dwarf shrubs. Photographed on Clavering Island, North East Greenland National Park, Greenland.

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Keywords: arctic, clavering island, climate, environment, geography, hummocks, inlet, lichen, mosses, mountains, national park, nature, north east greenland, permafrost, rocky, scenery, shrubs, stony, summer, tundra

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