Tundra regions of the world are typically defined as having no?
Tundra Tundra In physical geography, tundra () is a type of biome where the tree growth is hindered by low temperatures and short growing seasons. The term "tundra" comes through Russian (') from the Kildin Sami word (') meaning "uplands", "treeless mountain tract". Tundra vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. Scattered trees grow in some tundra regions. The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline. There are three regions and associated types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra.. Arctic tundra
Altai alpine meadow and tundra Because these mountains are at a relatively high latitude compared to other Central Asian mountains, the alpine regions begin at lower altitudes. The treeline at its highest is , and the zone of rocks and glaciers at . The region has a Tundra (Koppen classification ET). This climate is defined as having at least one month warm enough to melt snow (average greater than 0 degrees C), but no month averaging over . The high Altai region receives mean precipitation of about 294 mm/year. The mean temperature is in January, and in July. Overall, the plant life of the Altai