Geography

Main featuresThe total surface area of Argentina (not including the Antarctic claim), is as follows:Total: 2,766,891 km²Land: 2,736,691 km²Water: 30,200 km²Argentina is nearly 3,700 km long from north to south, and 1,400 km from east to west (maximum values). It can roughly be divided into four parts: the fertile plains of the Pampas in the center of the country, the source of Argentina's agricultural wealth; the flat to rolling, oil-rich plateau of Patagonia in the southern half down to Tierra del Fuego; the subtropical flats of the Gran Chaco in the north, and the rugged Andes mountain range along the western border with Chile.The highest point above sea level in Argentina is located in Mendoza. Cerro Aconcagua, at 6,962 meters (22,834 feet), is the highest mountain in the Americas, the Southern, and Western Hemisphere. The lowest point is Laguna del Carbón in Santa Cruz, −105 meters (−344 ft) below sea level. This is also the lowest point on the South American continent. The geographic center of the country is located in south-central La Pampa province.The country has a territorial claim over a portion of Antarctica (unrecognized by any other country), where, from 1904, it has maintained a constant presence.Geographic regionsThe country is traditionally divided into several major geographically distinct regions:PampasThe plains west and south from Buenos Aires. Called the Humid Pampa, they cover most of the provinces of Buenos Aires and Córdoba, and big portions of the provinces of Santa Fe and La Pampa. The western part of La Pampa and the province San Luis also have plains (the Dry Pampa), but they are drier and used mainly for grazing. The Sierra de Córdoba in the homonymous province (extending into San Luis), is the most important geographical feature of the pampas.Gran ChacoThe Gran Chaco region in the north of the country is seasonal dry/wet, mainly cotton growing and livestock raising. It covers the provinces of Chaco and Formosa. It is dotted with subtropical forests, scrubland, and some wetlands, home to a large number of plant and animal species. The province of Santiago del Estero lies in the drier region of the Gran Chaco.MesopotamiaThe land between the Paraná and Uruguay rivers is called Mesopotamia and it is shared by the provinces of Corrientes and Entre Ríos. It features flatland apt for grazing and plant growing, and the Iberá Wetlands in central Corrientes. Misiones province is more tropical and belongs within the Brazilian Highlands geographic feature. It features subtropical rainforests and the Iguazú Falls.PatagoniaThe steppes of Patagonia, in the provinces of Neuquén, Río Negro, Chubut and Santa Cruz, are of Tertiary origin. Most of the region is semiarid in the north to cold and arid in the far south, but forests grow in its western fringes which are dotted with several large lakes. Tierra del Fuego is cool and wet, moderated by oceanic influences. Northern Patagonia (roughly Río Negro south of the homonymous river, and Neuquén) can also be referred as the Comahue region .CuyoWest-central Argentina is dominated by the imposing Andes Mountains. To their east is the arid region known as Cuyo. Melting waters from high in the mountains form the backbone of irrigated lowland oasis, at the center of a rich fruit and wine growing region in Mendoza and San Juan provinces. Further north the region gets hotter and drier with more geographical accidents in La Rioja province.NOA or NorthwestThis region is the highest in average elevation. Several parallel mountain ranges, several of which have peaks higher than 20,000 feet (6,000 m), dominate the area. These ranges grow wider in geographic extent towards the north. They are cut by fertile river valleys, the most important being the Calchaquí Valleys in the provinces of Catamarca, Tucumán, and Salta. Farther north the province of Jujuy near Bolivia lies mainly within the Altiplano plateau of the Central Andes. The Tropic of Capricorn goes through the far north of the region.Rivers and lakesMajor rivers in Argentina include the Pilcomayo, Paraguay, Bermejo, Colorado, Río Negro, Salado, Uruguay and the largest river, the Paraná. The latter two flow together before meeting the Atlantic Ocean, forming the estuary of the Río de la Plata. Regionally important rivers are the Atuel and Mendoza in the homonymous province, the Chubut in Patagonia, the Río Grande in Jujuy, and the San Francisco River in Salta.There are several large lakes in Argentina, many of them in Patagonia. Among these are lakes Argentino and Viedma in Santa Cruz, Nahuel Huapi in Río Negro and Fagnano in Tierra del Fuego, and Colhué Huapi and Musters in Chubut. Lake Buenos Aires and O'Higgins/San Martín Lake are shared with Chile. Mar Chiquita, Córdoba, is the largest salt water lake in the country. There are numerous reservoirs created by dams. Argentina features various hot springs, such as those at Termas de Río Hondo with temperatures between 30 °C and 65 °C.Coastal areas and seasArgentina has 4,665 km (2,899 mi) of coastline. The continental platform is unusually wide; in Argentina this shallow area of the Atlantic Ocean is called Mar Argentino. The waters are rich in fisheries and suspected of holding important hydrocarbon energy resources. Argentina's coastline varies between areas of sand dunes and cliffs. The two major ocean currents affecting the coast are the warm Brazil Current and the cold Falkland Current (Spanish: corriente antártica or corriente de las Malvinas). Because of the uneveness of the coastal landmass, the two currents alternate in their influence on climate and do not allow temperatures to fall evenly with higher latitude. The southern coast of Tierra del Fuego forms the north shore of the Drake Passage.ClimateBecause of longitudinal and elevation amplitudes, Argentina is subject to a variety of climates. As a rule, the climate is predominantly temperate with extremes ranging from subtropical in the north to subpolar in the far south. The north of the country is characterized by very hot, humid summers with mild drier winters, and is subject to periodic droughts. Central Argentina has hot summers with thunderstorms (in western Argentina producing some of the world's largest hail), and cool winters. The southern regions have warm summers and cold winters with heavy snowfall, especially in mountainous zones. Higher elevations at all latitudes experience cooler conditions.The hottest and coldest temperature extremes recorded in South America have occurred in Argentina. A record high temperature of 49.1 °C(120.4 °F), was recorded at Villa de María, Córdoba on January 2, 1920. The lowest temperature recorded was −39 °C (−38.2 °F) at Valle de los Patos Superior, San Juan, July 17, 1972.Major winds in Argentina include the cool Pampero blowing on the flat plains of Patagonia and the Pampas after a cold front; the Viento Norte, a warm wind that can blow from the north in mid and late winter creating mild conditions; and the Zonda, a hot and dry wind (see also Föhn wind), affecting west-central Argentina. Squeezed of all moisture during the 6,000 meter descent from the Andes, Zonda winds can blow for hours with gusts up to 120 km/h, fueling wildfires and causing damage. When the Zonda blows (June-November), snowstorms and blizzard (viento blanco) conditions usually affect the higher elevations.The Sudestada (literally “southeastern”) could be considered similar to the Noreaster, though snowfall is rarely involved (but is not unprecedented). Both are associated with a deep winter low pressure system. The sudestada usually moderates cold temperatures but brings very heavy rains, rough seas, and coastal flooding. It is most common in late autumn and winter along the coasts of central Argentina and in the Río de la Plata estuary.The southern regions, particularly the far south, experience long periods of daylight from November to February (up to nineteen hours), and extended nights from May to August. All of Argentina uses UTC-3 time zone. The country does observe daylight saving time occasionally, the last summertime being started at 0:00 December 30, 2007.Extremities Argentina's eastermost continental point is northeast of the town of Bernardo de Irigoyen, Misiones (26°15′S, 53°38′W), the westernmost in the Mariano Moreno Range in Santa Cruz (49°33′S, 73°35′W). The northernmost point is located at the confluence of the Grande de San Juan and Mojinete rivers, Jujuy (21°46′S, 66°13′W), and the southernmost is Cape San Pío in Tierra del Fuego (55°03′S, 66°31′W).Enclaves and exclavesThere is one Argentine exclave, the Martín García Island (co-ordinates 34°11′S, 58°15′W). It is near the confluence of the Paraná and Uruguay rivers, a kilometer (0.62 mi) inside Uruguayan waters, and 3.5 kilometres (2.1 mi) from the Uruguayan coastline near the small town of Martín Chico (itself halfway between Nueva Palmira and Colonia del Sacramento).An agreement reached by Argentina and Uruguay in 1973 reaffirmed Argentine jurisdiction over the island, ending a century-old dispute. Under the terms of the agreement, Martín García is to be devoted exclusively as a natural preserve. Its area is about 2 square kilometres (500 acres), and its population is about 200 people.