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tundra, a major zone of treeless level or rolling ground found in cold regions, mostly north of the () or above the on high (alpine tundra). Tundra is known for large stretches of bare ground and and for patchy mantles of low vegetation such as , , herbs, and small shrubs. This surface supports a meagre but unique variety of . The Finns called their treeless northern reaches the tunturi, but the concept of a vast frozen plain as a special ecological realm called tundra was developed by the .One constant factor shaping the tundra is alternate freezing and thawing of the ground. Along with the factors mentioned above, this sets the tundra apart from two ecosystems frequently found adjacent to it—the icy on the one hand and the evergreen on the other. —perennially frozen ground—is a significant feature of the Arctic tundra; however, it does not typically occur in alpine regions. Distribution tundra biomeSouthern limit of Arctic tundra and approximate line of demarcation between Low and High Arctic.(more)The global extent of the tundra is considerable, accounting for roughly 10 percent of surface. The southern limit of Arctic tundra follows the northern edge of the belt. In this line lies above latitude 60° N, while in most of it occurs north of 70° N—except in eastern , where it extends southward to 60° N in . The northward bulge of in Eurasia is a result of the warmer summers that occur over that large contiguous landmass. Alpine tundra covers approximately 3 percent of Earth’s land surface, and it is mostly found in the Northern Hemisphere. This can be found in mountainous areas worldwide, occurring at high elevations where temperatures are too low and are too strong for the growth of trees. The average elevation where alpine tundra occurs is generally higher near the Equator than at the poles., Tundra, a cold region of treeless level or rolling ground found mostly north of the Arctic Circle or above the timberline on mountains. Tundra is known for large stretches of bare ground and rock and for patchy mantles of low vegetation such as mosses, lichens, herbs, and small shrubs., TUNDRA meaning: a large area of flat land in northern parts of the world where there are no trees and the ground is always frozen.

The tundra is a large, barren region with no trees. In fact, the word tundra comes from the Finnish word tunturia , which means “treeless plain.” Areas of tundra lie between the permanent ice of the far north and the northern forests of North America, Europe, and Asia., tundra, Treeless, level or rolling ground above the taiga in polar regions (Arctic tundra) or on high mountains (alpine tundra), characterized by bare ground and rock or by such vegetation as mosses, lichens, small herbs, and low shrubs., The tundra is an area of treeless, level or rolling ground found in cold regions. It accounts for roughly 10 percent of Earth’s surface. The two major tundra zones are the Arctic tundra, found mostly north of the Arctic Circle, and the alpine tundra, located above the timberline on high mountains (see Arctic regions)., tundra climate, major climate type of the Köppen classification characterized by sub-freezing mean annual temperatures, large annual temperature ranges (but not as large as in the adjacent continental subarctic climate), and moderately low precipitation., …of the Arctic Circle (Arctic tundra) or above the timberline on high mountains (alpine tundra). Tundra is known for large stretches of bare ground and rock and for patchy mantles of low vegetation such as mosses, lichens, herbs, and small shrubs., Tundra - Arctic, Permafrost, Climate: Tundra climates vary considerably. The most severe occur in the Arctic regions, where temperatures fluctuate from 4 °C (about 40 °F) in midsummer to –32 °C (–25 °F) during the winter months..

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