Difference between revisions of "Earth Science 7-4 South America"

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	'''Mining Trends'''		'''Mining Trends'''
−	The mining in South America aren't all in the mountains, or all by the ocean, or all near rivers. Instead, the mining is spread out.	+	The mining in South America isn't all in the mountains, all by the ocean, or all near rivers. Instead, the mining is spread out.
	*Near rivers		*Near rivers
	**Magdalena River: gold, platinum		**Magdalena River: gold, platinum

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Revision as of 23:17, 22 February 2012

South America

By: Sunnie Liu, Arjun Guru, and Campbell Hinrichs

Earth Science 7-Regions

Countries

• Colombia
• Venezuela
• Guyana
• Suriname
• French Guiana
• Brazil
• Ecuador
• Peru
• Bolivia
• Paraguay
• Uruguay
• Argentina
• Chile

^[1]

Latitude and Longitude Ranges

• Latitude: 12˚N-55˚S
• Longitude: 81˚W-35˚W

^[2]

Elevation Range

• Lowest: 0 m (Sea Level)
• Highest: 6,960 m (Cerro Aconcagua, Argentina)

^[3]

Large Bodies of Water and Rivers

Seas

• Caribbean Sea
• Scotia Sea

Lakes

• Lake Titicaca (Peru)
• Lake Maracaibo (Venezuela)

Gulfs

• Gulf of San Jorge (Argentina)
• Gulf of San Matias (Argentina)
• Gulf of Penas (Chile)
• Gulf of Guayaguil (Ecuador)
• Gulf of Paria (Venzuela)
• Gulf of Venezuela (Venezuela)

Strait

• Strait of Magellan (Chile)

River

• Amazon River (Central/Eastern S. America, 2 mouths in northeastern Brazil)

Passage

• Drake Passage

^[4]

Major Topographic Features

Mountains

• The Andes Mountain Range
  • Aconcagua Mountain(Argentina)
    • It is the tallest mountain in the Western Hemisphere at 22,835 feet (6,960 meters).
    • The Aconcagua is part of the Andes Mountain Range.

Regions

• The Altiplano
  • This region is cold, windswept, and almost treeless.
• The Central Plains
  • These plains cover roughly three-fifths of South America.
  • They are divided into four areas
    • Llanos: rolling grasslands
    • Selva: lowland region covered with tropical rainforest
    • Gran Chaco: hardwood scrub forest in north-central Argentina, western Paraguay, and southeastern Bolivia
      • The other area of the Gran Chaco is the Pampas, a vast grassland of Argentina and Uruguay with fertile soil that supports many farms and ranches.
• The Eastern Highlands consist of two areas separated by the Amazon River Basin.
  • The Guiana Highlands rise north of the Amazon Basin.
    • They are 3,000-5,000 feet above sea level.
    • The Guiana Highlands is covered with Tropical forests and open grasslands.
    • They are thinly populated and largely underdeveloped.
  • The Brazilian Highlands stretch South of the Amazon region to Southeastern Brazil.
    • They cover nearly a fourth of the continent.
    • The highest mountain in this region at 9,482 feet is northeast of Rio de Janeiro and is called Pico de Bandera
    • But, most of the Brazilian Highlands consist of rounded hills and flat tablelands between 1,000 and 3,000 feet above sea level.
    • The Southern Brazilian Highlands have fertile farmland, sufficient cattle ranches, and rich mineral deposits.

Waterfalls

• Angel Falls (eastern Venezuela)
  • It is the largest waterfall in the world.
  • It also has the longest drop of 3,212 feet.
    • The water drops down a cliff, lands as mist, and drains into the Chúrun River.
• Cuquenán Falls (southeastern Venezuela)
  • It is the world’s second highest waterfall, with a drop of 2,000 feet (610 meters).
• Iguaçu Falls (are on the border between Argentina and Brazil)
  • Many people consider these falls the most magnificent natural sight in South America.
  • The Iguaçu River forms Iguaçu Falls as it plunges 237 feet (72 meters) along an arc about 2 miles (3.2 kilometers) wide.

Deserts

• A coastal desert extends from southern Ecuador, along the coast of Peru, and meets the Atacama Desert of northern Chile.
• A much smaller desert covers the northern part of Colombia’s border with Venezuela.
• Patagonia, in southern Argentina, is a semidesert region.
• The Sertão of northeastern Brazil is a dry area covered with thorny bushes and low trees.
  • Increasingly frequent droughts threaten to create a new desert there.

Tropical Rain Forests

• Tropical rain forests cover more than a third of South America.
  • Dense rain forests blanket most of the warm, wet Amazon River Basin and the northeast and northwest coasts of the continent.
    • Many valuable forest products come from the lush Amazon region.
  • Large areas of coastal rain forest in Brazil have been cleared for farming and ranching.
    • In these rain forests, most of the soil’s fertility comes from decaying leaves and causes the soil to be thin and poor.

Islands

• The Galapagos Islands
  • These islands belong to Ecuador and lie in the Pacific about 600 miles (970 kilometers) off the coast of that country.
• Marajo, an island at the mouth of the Amazon River, belongs to Brazil.
  • Herders raise water buffaloes on this flat, grassy island.
• The Tierra del Fuego
  • This group lies across the Strait of Magellan from the southernmost tip of the South American mainland.
  • Argentina and Chile own them.
• Juan Fernandez Islands
  • Chile also owns these islands in the Pacific, about 400 miles (640 kilometers) off Chile’s coast.
• The Falkland Islands
  • They are an overseas territory of the United Kingdom and lie in the South Atlantic about 320 miles (515 kilometers) east of the southern coast of Argentina.
  • Argentina also claims these islands and calls them the "Islas Malvinas."

^[5]

Bordering Oceans

• Pacific Ocean
• Atlantic Ocean

^[6]

Climate Zones

Af (tropical rainforest)

• Doesn't have a dry season
  • The driest month has at least 2.40’’ (61 mm) of rain.
• Rainfall is usually evenly distributed throughout the year.
• All average monthly temperatures are greater than 64˚F (18˚C).

Am (tropical monsoonal)

• Has a distinct wet season and a short dry season
  • One or more months have less than 2.40’’ (61 mm) of rain.
• All average monthly temperatures are greater than 64˚F (18˚C).
• The highest annual temperature precedes the rainy season.

Aw (tropical savanna)

• Has a dry winter season
• There are more than two months with less than 2.40’’ (61 mm) of rain.
• All average monthly temperatures are greater than 64˚F (18˚C).

Cfc (marine west coast)

• Is a mild mid-latitude climate
• Doesn't have a dry season
• Has a cool summer
• Average temperatures of all months are lower than 72˚F (22˚C).
  • 1-3 months with average temperatures over 50˚F (10˚C).
• Evenly distributed rainfall throughout the year

Csc

• Is a mild mid-latitude climate
• Has a dry and cool summer season

Cwc

• Is a mild mid-latitude climate
• Has a dry winter season and a cool summer

^[7]

Earthweek

Houston Chronicle 10-16-11

Over the recent weeks, the ozone hole over Antarctica has extended deeper into South America, causing hazardous amounts of ultraviolet radiation from the sun to reach the areas around Santiago, Chile. Three weeks ago, Santiago’s ultraviolet index hit an 8—the highest recorded for that specific time of the year since 2008. A 10% increase in ultraviolet radiation last January, with the ultraviolet index sometimes reaching above 12 was recorded for Chile’s capital city. According to Chile’s cancer institute, within the last decade, there has been an increase in the number of people that have skin cancer, which is directly associated with high ultraviolet levels.

Earth movements were felt in northern Argentina from the 6.1 magnitude earthquake of Bali, an Indonesian resort island.

Houston Chronicle 10-23-11

Up to 2,000 hammerhead, Galapagos, and whale sharks were massacred for their fins in Colombia’s territorial waters, around Malpelo Island. Costa Rica was asked by environmental authorities to help track down those responsible for the slaughter.

75 mph winds over Argentina whipped up volcanic ash clouds from the eruption by neighboring Chile’s Puyehue volcano. The fear that the debris could damage jet engines caused many airports in Argentina and Uruguay to shut down.

Houston Chronicle 11-6-11

Along the Peruvian central coast, a 6.9 magnitude earthquake injured 103 people. The same temblor wrecked over 1,000 adobe homes in the Inca region and an 18th century cathedral in the local capital.

In Chile, the Hudson volcano’s rumblings along with those of the Cordón Caulle volcano covered a huge part of neighboring Argentina in ash and upset air travel for many months. About 1,000 miles south of Santiago, Hudson ejected a column of steam and ash that shot up over 3 miles into the sky. Snow melted by the volcano’s interior heat caused the Aysen River to overflow its banks, forcing 119 people to evacuate.

In Chorro de Agua Caliente (“hot water jet”), an Argentine reservoir in the province of Córdoba with water that once cooled a nuclear power plant, a three-eyed fish was caught. The fishermen claim they will submit the fish for testing. The capture of the mutated fish inspired a Simpsons episode called “Two Cars in Every Garage and Three Eyes on Every Fish.”

In Mariscal Estigarribia, Paraguay, a record high of 110˚F was registered.

Houston Chronicle 11-13-11

In Chile’s Atacama Desert, wildflowers that bloomed during the area’s wettest winter in decades have emerged from the sand, around cacti, and out of cracks in rocks. 370 miles north of Santiago, Atacama Desert’s Llanos de Challes National Park is likely to be in springtime bloom until December. Over the past year, the near-record La Niña in the nearby tropical Pacific Ocean brought about 2 inches of rainfall to the park.

^[8]

Factors that Affect the Climate of South America

Latitude

Almost-vertical rays from the sun hit areas near the equator all throughout the year, causing the areas around the equator to have hot climates. Therefore, Ecuador, Colombia, Venezuela, Guyana, Suriname, French Guiana, northern Brazil, and northern Peru all have warm climates. The low-pressure areas of the intertropical convergence zone (ITCZ) and the mid-latitudes have plenty have precipitation. In July, the areas of South America that have the equator running through them are in the ITCZ, causing those areas to have precipitation. In January, the northern half of South America is in the ITCZ, causing that half to have precipitation. The air sinks in the horse latitudes, the areas between 20 and 30 degrees latitude. Since sinking air can hold very little precipitation, the horse latitudes are dry with little precipitation, causing many deserts to form in the horse latitudes. Because the horse latitudes run through the middle of South America, the central areas have little precipitation.

Elevation

As altitude increases, the air becomes thinner and less capable of absorbing and retaining heat. Therefore, at higher elevations, the temperatures are colder. Also, air contains less moisture at higher elevations. In South America, low-lying areas, like the coast of Brazil by the Atlantic Ocean, have relatively high temperatures and humid climates. Whereas in mountainous areas, such as Cerro Aconcagua, Argentina, have relatively low temperatures and dry climates.

Proximity to Water

Since water cools and heats slower than land, the temperature range for large bodies of water is small, causing coastal areas to have relatively mild climates while causing inland areas to have more extreme climates. Also, large bodies of water add water vapor to the air, causing a greater chance of precipitation for areas nearby. Cartagena, a coastal city of Colombia, has an average temperature range of 26.7˚C (80.1˚F) – 28.1˚C (82.6˚F) and a total yearly rainfall of 37.4 in. (950.7 mm). La Paz, an inland city of Bolivia, has an average temperature range of 7.3˚C (45.1˚F) – 10.9˚C (51.6˚F) and a total yearly rainfall of 24.0 in. (610.3 mm). ^{[9] [10]}

Ocean Currents

Warm ocean currents warm nearby coasts while cold currents cool nearby coasts. Warm currents, such as the South Equatorial Current, Equatorial Countercurrent, and Brazil Current, cause all of the northern coast, the northwestern coast, and most of the eastern coast of South America to have warmer climates than they would otherwise. Cold currents, like the Peru Current and West Wind Drift, cause most of the western coast and the southeastern coast of South America to have cooler climates than they would otherwise.

Topography

Since mountainous areas have higher altitudes, they usually have cooler climates. For example, Chile has a colder climate than it would otherwise because of the Andes Mountain Range. The air traveling up the windward side cools at the moist-adiabatic lapse rate (approximately 6˚C per kilometer) while the air traveling down the leeward side warms at the dry-adiabatic lapse rate (about 10˚C per kilometer). Thus, the leeward side of the Andes Mountains is warmer than the windward side. When wind reaches the windward side, it is forced to rise. Since air cools as it rises, some of the water vapor condenses and may fall as precipitation. The rain or snow removes moisture from the air on the windward side, causing the leeward side to be very dry. Therefore, the windward side of the Andes Mountains is wetter than the leeward side. Mountains also act as barriers to air masses. When a cool, moist air mass reaches the Andes Mountain Range, it is forced up the windward side, losing moisture as it rises. The air mass sinks on the leeward side, where it is compressed and warmed. The now hot, dry air is over the Atacama Desert, the driest desert on earth.

Prevailing Winds

Prevailing winds determine if air masses arrive from a warm or cool region. These winds also determine if air masses arrive from a wet or dry region. The prevailing northeasterlies bring moist air masses from the warm tropical ocean, such as the maritime tropical (mT), to the areas of South America north of the equator. The prevailing southeasterlies bring humid air masses from the warm tropical ocean, like the maritime tropical (mT), and dry air masses from warm inland areas near the 30˚S latitude to the middle regions of South America. The prevailing northwesterlies bring moist air masses from the South Pacific Ocean to the southern tip of South America.

Vegetation

The vegetation affects the amount of insolation the earth’s surface absorbs and how fast the surface heats or cools. In the Atacama Desert of South America, there is little vegetation. Therefore, the surface absorbs heat quickly but also cools quickly. In the daytime, the temperatures are scorching hot, and at night, the temperatures drop rapidly. The vegetation also releases water vapor into air through transpiration. This makes the air more humid, causing an area with plenty of vegetation to have a wet climate. Since the Amazon Rainforest in Brazil is home to over five million different species of plants, the climate there is very moist.

High and Low Pressure Zones

When the temperatures are lower, the air molecules clump together more closely. Thus, an area of high pressure indicates cooler temperatures. When the temperatures are higher, the air molecules spread farther apart. Therefore, an area of low pressure indicates warmer temperatures. Also, a high pressure zone usually has dry air and a low pressure zone usually has humid air. Because the equator is in a low pressure zone and Ecuador, southern Colombia, northern Brazil, and northern Peru are all along the equator, most of these areas all have humid, warm climates (tropical wet). Part of the Amazon Rainforest is along the equator and thus, in a low pressure area, accounting for its warm, moist climate. Since the 30° latitude line is in a high pressure zone and central Chile, northern Argentina, northern Uruguay, and southern Brazil are along the 30° latitude line, these regions have cooler, drier climates. For example, central Chile and most of northern Argentina has a desert or semiarid climate (except for the Andes Mountains, which has a highland climate). The Atacama Desert is also along the 30° latitude line and therefore in a high pressure zone, accounting for its dry climate.

^[11]

Average Monthly Precipitation and Temperature Highs/Lows

Iquitos, Peru (Af)

Average Monthly Precipitation

• Jan: 10.5 in (267.7 mm)
• Feb: 10.0 in (254.1 mm)
• Mar: 12.7 in (322.9 mm)
• Apr: 11.9 in (301.3 mm)
• May: 10.5 in (267.1 mm)
• Jun: 8.2 in (207.6 mm)
• Jul: 6.4 in (162.6 mm)
• Aug: 6.5 in (165.9 mm)
• Sep: 7.5 in (190.2 mm)
• Oct: 9.1 in (230.6 mm)
• Nov: 9.8 in (249.3 mm)
• Dec: 10.2 in (258.4 mm)

^[12]

Average Monthly Temperature

• 26.1°C (79.0°F)

Highest Monthly Temperature

• 26.6°C (79.9°F)

Lowest Monthly Temperature

• 25.2°C (77.4°F)

^[13]

Santarem, Brazil (Am)

Average Monthly Precipitation

• Jan: 8.1 in (205.1 mm)
• Feb: 11.6 in (295.4 mm)
• Mar: 15.2 in (385.0 mm)
• Apr: 14.5 in (367.3 mm)
• May: 11.2 in (285.7 mm)
• Jun: 5.0 in (127.8 mm)
• Jul: 3.5 in (87.7 mm)
• Aug: 1.7 in (42.2 mm)
• Sep: 1.2 in (29.9 mm)
• Oct: 1.4 in (34.5 mm)
• Nov: 2.8 in (70.5 mm)
• Dec: 4.3 in (109.4 mm)

^[14]

Average Monthly Temperature

• 25.8°C (78.4°F)

Highest Monthly Temperature

• 26.8°C (80.2°F)

Lowest Monthly Temperature

• 25.2°C (77.4°F)

^[15]

Brasilia, Brazil (Aw)

Average Monthly Precipitation

• Jan: 10.3 in (262.2 mm)
• Feb: 8.4 in (212.9 mm)
• Mar: 7.9 in (201.9 mm)
• Apr: 4.1 in (102.9 mm)
• May: 0.8 in (19.7 mm)
• Jun: 0.2 in (4.0 mm)
• Jul: 0.2 in (4.2 mm)
• Aug: 0.2 in (5.8 mm)
• Sep: 1.4 in (34.5 mm)
• Oct: 5.5 in (139.7 mm)
• Nov: 9.4 in (238.2 mm)
• Dec: 12.9 in (328.6 mm)

^[16]

Average Monthly Temperature

• 20.6°C (69.1°F)

Highest Monthly Temperature

• 21.7°C (71.1°F)

Lowest Monthly Temperature

• 18.4°C (65.1°F)

^[17]

Huayao, Peru (Cwc)

Average Monthly Precipitation

• Jan: 4.9 in (123.7 mm)
• Feb: 4.6 in (116.3 mm)
• Mar: 4.5 in (114.6 mm)
• Apr: 2.2 in (54.8 mm)
• May: 1.0 in (24.4 mm)
• Jun: 0.3 in (8.6 mm)
• Jul: 0.3 in (7.4 mm)
• Aug: 0.6 in (16.3 mm)
• Sep: 1.8 in (45.4 mm)
• Oct: 2.6 in (65.1 mm)
• Nov: 2.7 in (69.8 mm)
• Dec: 3.6 in (90.8 mm)

^[18]

Average Monthly Temperature

• 11.2°C (52.2°F)

Highest Monthly Temperature

• 12.3°C (54.1°F)

Lowest Monthly Temperature

• 9.5°C (49.1°F)

^[19]

Punta Arenas, Chile (Cfc)

Average Monthly Precipitation

• Jan: 1.4 in (35.4 mm)
• Feb: 1.1 in (28.1 mm)
• Mar: 1.5 in (39.3 mm)
• Apr: 1.6 in (41.0 mm)
• May: 1.7 in (42.4 mm)
• Jun: 1.3 in (32.4 mm)
• Jul: 1.3 in (33.8 mm)
• Aug: 1.3 in (33.1 mm)
• Sep: 1.1 in (27.5 mm)
• Oct: 0.9 in (23.6 mm)
• Nov: 1.1 in (28.8 mm)
• Dec: 1.2 in (31.5 mm)

^[20]

Average Monthly Temperature

• 6.3°C (43.3°F)

Highest Monthly Temperature

• 10.8°C (51.4°F)

Lowest Monthly Temperature

• 1.7°C (35.1°F)

^[21]

Santiago del Estero Aero., Argentina (Csc)

Average Monthly Precipitation

• Jan: 4.0 in (102.8 mm)
• Feb: 3.9 in (98.1 mm)
• Mar: 3.6 in (91.0 mm)
• Apr: 1.3 in (32.4 mm)
• May: 0.6 in (15.7 mm)
• Jun: 0.3 in (8.2 mm)
• Jul: 0.2 in (4.1 mm)
• Aug: 0.2 in (4.2 mm)
• Sep: 0.5 in (12.4 mm)
• Oct: 1.3 in (33.8 mm)
• Nov: 2.5 in (62.9 mm)
• Dec: 3.3 in (82.6 mm)

^[22]

Average Monthly Temperature

• 20.6°C (69.1°F)

Highest Monthly Temperature

• 26.9°C (80.4°F)

Lowest Monthly Temperature

• 13.0°C (55.4°F)

^[23]

Geology

Rocks

Minerals

Mining

Mining in the Countries

• Colombia: petroleum, natural gas, coal, iron ore, nickel, gold, copper, emeralds
• Venezuela: petroleum, natural gas, iron ore, gold, bauxite, diamond
• Guyana: bauxite, gold, diamond
• Suriname: kaolin, bauxite, gold, nickel, copper, platinum, iron ore
• French Guiana: gold, petroleum, kaolin, niobium, tantalum, clay
• Brazil: bauxite, gold, iron ore, manganese, nickel, phosphates, platinum, tin, uranium, petroleum
• Ecuador: petroleum
• Peru: copper, silver, gold, petroleum, iron ore, coal, phosphate, potash, natural gas
• Bolivia: tin, natural gas, petroleum, zinc, tungsten, antimony, silver, iron, lead, gold
• Paraguay: iron ore, manganese, limestone
• Uruguay: minor minerals
• Argentina: lead, zinc, tin, copper, iron ore, manganese, petroleum, uranium
• Chile: copper, iron ore, nitrates, precious metals, molybdenum

^[24]

Mining Trends

The mining in South America isn't all in the mountains, all by the ocean, or all near rivers. Instead, the mining is spread out.

• Near rivers
  • Magdalena River: gold, platinum
  • Orinoco River: iron, diamonds, tin
  • Amazon River: bauxite, iron, gold
  • Sao Francisco River: chromium, copper
  • Parana River: manganese, gold, bauxite, iron
  • Rio de la Plata: gold
• Andes Mountains: gold, silver, zinc, lead, copper, iron
• Amazon rain forest: silver, zinc, lead, tin, iron, copper, gold, bauxite, diamonds, manganese, platinum
• Near oceans and seas
  • Pacific Ocean: gold, silver, zinc, lead, copper, iron, nickel
  • Caribbean Sea: bauxite, gold, iron
  • Atlantic Ocean: chromium, diamonds, gold, iron, manganese, bauxite, silver

^[25]

References

1. ↑ http://memory.loc.gov/frd/cs/continent_americas.html \
2. ↑ South America. Map. Google Earth. Google.com, 3 Nov. 2011. Web. 2 Nov. 2011.
3. ↑ https://www.cia.gov/library/publications/the-world-factbook/fields/2020.html#52
4. ↑ http://www.worldatlas.com/webimage/countrys/samerica/samera.htm
5. ↑ http://www.worldbookonline.com/advanced/article?id=ar520980&st=south+america
6. ↑ https://www.cia.gov/library/publications/the-world-factbook/maps/refmap_south_america.html
7. ↑ http://www.srh.noaa.gov/jetstream/global/climate_max.htm
8. ↑ http://www.earthweek.com
9. ↑ http://www.worldclimate.com/cgi-bin/grid.pl?gr=N10W075
10. ↑ http://www.worldclimate.com/cgi-bin/grid.pl?gr=S16W068
11. ↑ Spaulding, N. E. & Namowitz, S. N. Earth Science. McDougal Littel Inc: Evanston, IL. 2005.
12. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S03W073+2100+84377W
13. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S03W073+1102+84377W
14. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S02W054+2100+82244W
15. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S02W054+1102+8224402G1
16. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S15W047+2100+8338401G1
17. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S15W047+1102+83377W
18. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S12W075+2100+84630W
19. ↑ http://http://www.worldclimate.com/cgi-bin/data.pl?ref=S12W075+1102+84630W
20. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S53W070+2100+85934W
21. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S53W070+1102+85934W
22. ↑ http://www.worldclimate.com/cgi-bin/grid.pl?gr=S27W064
23. ↑ http://www.worldclimate.com/cgi-bin/data.pl?ref=S27W064+1102+87129W
24. ↑ https://www.cia.gov/library/publications/the-world-factbook/fields/2111.html
25. ↑

Links to Maps

[1] Physical South America Map [2] South America Weather Map [3] World Climate Maps [4] South America Countries Map [5] South America Map with countries, regions, territories, and large bodies of water [6]World Climate Zone Map(Köppen Classification System) [7]South America Current Temperature Map [8]South America Current Barometric Pressure Map [9]South America Current Wind Speed Map [10]South America Total Annual Rainfall Map [11]World Mineral Map [12]World Energy and Minerals Map [13]South America Mining Map [14]South America Geological Map