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In Latin America, tierra fría (Spanish for ''cold land'') are mountain locations where high elevation results in a markedly cooler climate than that encountered in the lowlands at a comparable latitude. The combination of low latitude and high altitude — typically between approximately 6,000 ft (about 1,850 m) and 10,000 ft (about 3,600 m)〔(Brigitta Schütt (2005); Azonale Böden und Hochgebirgsböden )〕〔Zech, W. and Hintermaier-Erhard, G. (2002); Böden der Welt – Ein Bildatlas, Heidelberg, p. 98.〕〔Christopher Salter, Joseph Hobbs, Jesse Wheeler and J. Trenton Kostbade (2005); Essentials of World Regional Geography 2nd Edition. NY: Harcourt Brace. p.464-465.〕〔()〕 in locations within 10° of the equator — produces a climate that falls into the same category as many oceanic climates found along the west coasts of the continents within the temperate zones — mild temperatures all year round, with monthly averages ranging from about 10°C (50°F) in the coldest months to about 18°C (64.4°F) in the warmest months (at places further poleward the range of altitudes where this climate exists becomes progressively lower). Common crops grown in the tierra fría are potatoes, wheat, barley, oats, corn, rye, and maize. Beyond the ''tierra fría'' is a region known as the ''suni'', ''puna'', or ''páramos''; near the Equator this encompasses places with altitudes of between roughly 12,000 ft (3,600 m) and 15,000 ft (4,500 m), representing the treeline and the snow line respectively. Vegetation here resembles that found in the tundra of the polar regions. Still higher is the ''tierra nevada'', where permanent snow and ice prevail. The Peruvian geographer Javier Pulgar Vidal (Altitudinal zonation) used following altitudes: 2,300 m (end of the Cloud forest or ''Yunga fluvial''), 3,500 m (Treeline) and 4,800 m (Puna end).〔Pulgar Vidal, Javier: Geografía del Perú; Las Ocho Regiones Naturales del Perú. Edit. Universo S.A., Lima 1979. First Edition (his dissertation of 1940): Las ocho regiones naturales del Perú, Boletín del Museo de historia natural „Javier Prado“, n° especial, Lima, 1941, 17, pp. 145-161.〕 Some of Latin America's largest cities are found in the tierra fria, most notably Bogotá, Colombia, altitude 2,640 m, Mexico City, Mexico, altitude 2,240 m and Quito, Ecuador, altitude 2,850 m; all three cities are also the capitals of those respective countries. Agriculture in the region resembles that which is conducted in valley areas in the temperate zones, featuring such crops as barley and potatoes. == Literature == 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tierra fría」の詳細全文を読む スポンサード リンク
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