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Lecture 3 physiography, geography and climate of l.a
Latin America contains many notable physical landmarks including the longest mountain range in the world (the Andes), the world's highest volcanoes, largest rainforest (Amazon), and driest desert (Atacama). The climate of most of Latin America is tropical, with little seasonal temperature variation but distinct wet and dry seasons. Elevation strongly influences climate, with five altitudinal zones ranging from hot lowlands to cold mountain peaks. Major physical features include the Andes Mountains, Mexican plateau, Central American volcanic arc, and lowland river basins of the Amazon, Orinoco, and Rio de la Plata.
Lecture 3 physiography, geography and climate of l.a
- 1. Physiography, Geography and Climate of Latin America (Lecture 3)
- 2. Natural Landmarks inLatin America World's longest and second highest mountain range, and the world's highest active volcanoes. Biggest river in the world. World's driest desert. World's largest rainforest, and is the world's greatest storehouse of species World's greatest reserve of potential agricultural land. It is a great storehouse of minerals, with enormous potential production.
- 3. Landscape of Contrast: Patagonia: lakes, penguins, continental ice
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- 5. Pico de Orizaba(Volcano Citlaltépetl), México's highest peak and North America's highest volcano.
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- 7. Rainforest canopy, andAmazon River Continuous Fields Tree Cover Project
- 8. Climate Most ofLatin America is located in the tropics – Land located between the Tropic of Cancer (23.5o N) and the Tropic of Capricorn (23.5o S) – In the tropics there is not much seasonal variation in temperature; seasonal differences are manifested in rainfall variations.
- 9. Dallas USA 100 25 80 20 Temperature (F) Precipitation (in) 60 40 15 The Tropical 20 10 Climate: Little 0 5 variation in annual -20 J F M A M J J A S O N D 0 temperature Annual Precip: 34.6 in. Max Temp. Ave. Temp. Ave. Precip. Rowntree, Lewis, and Price. Diversity and Globalization: World Regions, Environment, Development, 2nd edition (2002).
- 10. Air temperature –yearly changes
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- 12. Altitudinal Zonation – Muchof the temperature variation in the tropics is seen with changes in elevation rather than changes in latitude As elevation increases, temperature decreases at an average rate of 3.5oF/1,000 ft. Five climate zones: Caliente (hot), Templada (warm), Fria (cold), Helada (frozen), and Paramos.
- 13. 0 – 499m 500 – 999 m Tierra Caliente “Hot Land” below 900 meters - 3,000’ in elevation, coastal plains and foothills Hot days, warm nights Tropical agricultural products – sugar cane, tropical fruits (bananas), & lowland tubers
- 14. 0 – 499m 500 – 999 m 1000 – 1999 m Tierra Templada Cloud Forest Nicaragua, coffee plantation –Temperate Land 900 m (3,000’)– 1800m (6,000’) in elevation, intermediate mountain slopes Mild days and cool nights Most populous zone Agricultural products include – Coffee, maize, vegetables, cut flowers.
- 15. 0 – 499m 500 – 999 m 1000 – 1999 m 2000 – 2999 m Tierra Fria Potato harvest, Bolivia “Cold Land” 1800m (6,000’) – 3600m (12,000’) in elevation, mountainous areas More common in South America Warm days and cold nights Wheat, barley, maize, tubers (Peruvian Andes), sheep, guinea pigs, Llama, Alpaca (hardier or highland crops and animals
- 16. 0 – 499m 500 – 999 m 1000 – 1999 m 2000 – 2999 m 3000 – 3999 m Tierra Helada 4000 – 4999 m –“Frozen Land” Above 3600m (12,000’) in elevation, highest mountain peaks Cool days and cold nights Highland grains and tubers, sheep, guinea pigs, Llama, Alpaca
- 17. 0 – 499m 500 – 999 m 1000 – 1999 m 2000 – 2999 m 3000 – 3999 m Paramos 4000 – 4999 m 5000 – 5999 m – Above 4600 m (15,000’) in elevation, highest mountain peaks Just below snow line characterized by tussock grasses, shrubs and cushion plants
- 18. Glaciers and theSnowline: LA has glaciers near the equator Latin America
- 19. Physical Geography Latin Americaand the Caribbean can be divided in three topographic zones: Lowlands ( less than 500 meters) Highlands (500-2000 meters) – Plateaus: flat top highland regions Mountain (greater than 2000 meters)
- 20. Plateaus or highlands Mountains lowlands 1000 2000 3000 0m >5000 m
- 21. The Mighty Andes Northern,Central and Southern Andes – Run from northwestern Venezuela to the southern tip of Tierra del Fuego. Mountain chain formed by the subduction of the Pacific plate beneath South America. – Approximately 30 peaks that are over 20,000 feet high – The Andes are divided into three sub-regions Northern – Venezuela, Columbia, and Ecuador Central – Ecuador, Peru and Bolivia – high altitude plateaus (Altiplano) Southern – defines the border between Chile & Argentina – South of Santiago the mountains are lower.
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- 23. Relief of S.America
- 24. Highlands of Mexicoand Central America – Mexican plateau and the Central American volcanic arc – This area is home to the major cities of Mexico and Central America – Mexican Plateau lower (4,000’) in the north (near Juarez) and higher (8,000’) in the south (near Mexico City) This region is home to rich deposits of silver, copper & zinc – Central American Highlands Volcanic chain runs from Tehuantepec Isthmus, southern Guatemala, Costa Rica to Panama The volcanic eruptions has resulted in rich volcanic soil throughout much of Central America
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- 26. Middle America Physiography Mexico to Tehuantepec Cordilleran system of North America continues in Mexico with Sierra Madre Oriental and Occidental forming an intermontane plateau of 4,000 to 8,000 feet. Tehuantepec to Panama Highlands of volcanic origin containing high plateaus. Narrow coastal lowlands. The intermontane basins may contain lakes as Lake Nicaragua
- 27. Andes Mountains FlyoverVideo This computer animation simulates a high- altitude flight along the Andes.
- 28. South America Flyoverthe Andes http://www.jpl.nasa.gov/srtm/images/movies/AndesFlt_3201.MPG
- 29. Plateaus of SouthAmerica Brazilian Plateau Largest and more important in terms of natural resources and settlement Runs from the southern edge of the Amazon Basin to the Rio de la Plata Major population centers of Brazil are located along the coastal fringe of the Brazilian plateau. Patagonian Plateau Much of this area is steppe (dry grasslands) Guiana Plateau A sparsely settled region
- 31. River Basins andLowlands Within the major river basins there are vast interior lowlands Most of these lowlands are sparsely settled and offer little agricultural activity, with the exception of grazing livestock
- 32. Amazon lowlands Rio de la Plata lowlands
- 33. Rivers of Latin America: All ofthe Major Rivers are in South America
- 34. Continental Orinoco system Divide in S. Amazon system America is close to the Pacific Rio de la Plata system The Continental divide North America in a more central position Continental divide
- 35. Run off /Water Surplus
- 36. 3 Major Riversin S. America 1. Amazon 3 – Drains an area of approx. 2.4 million sq. miles – the 1 largest river in the world 2. Rio de La Plata – S. America’s second largest watershed 3. Orinoco River 2 – Third largest river basin in South America –
- 37. Natural Resources Becauseof its tropical location, there is a high degree of biodiversity in the region – Many varieties of plants and animals found nowhere else on earth – The region is home to the world’s largest rain forest There are also massive reserves of natural resources – natural gas and oil (South America as well as Mexico) – copper (Chile), silver (Mexico and Peru), Iron (Brazil).