18th parallel south

The 18th parallel south is a circle of latitude that is 18 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, Africa, the Indian Ocean, Australasia, the Pacific Ocean and South America.

Line across the Earth
18th parallel south

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 18° south passes through:

Co-ordinates Country, territory or sea Notes
18°0′S 0°0′E / 18.000°S 0.000°E Atlantic Ocean
18°0′S 11°49′E / 18.000°S 11.817°E  Namibia
18°0′S 20°41′E / 18.000°S 20.683°E  Angola
18°0′S 20°53′E / 18.000°S 20.883°E  Namibia Caprivi Strip
18°0′S 21°22′E / 18.000°S 21.367°E  Angola
18°0′S 21°34′E / 18.000°S 21.567°E  Namibia Caprivi Strip
18°0′S 24°18′E / 18.000°S 24.300°E  Botswana
18°0′S 24°28′E / 18.000°S 24.467°E  Namibia Caprivi Strip
18°0′S 24°37′E / 18.000°S 24.617°E  Botswana
18°0′S 25°16′E / 18.000°S 25.267°E  Zimbabwe
18°0′S 25°57′E / 18.000°S 25.950°E  Zambia For about 3 km
18°0′S 25°59′E / 18.000°S 25.983°E  Zimbabwe
18°0′S 26°34′E / 18.000°S 26.567°E  Zambia
18°0′S 26°49′E / 18.000°S 26.817°E  Zimbabwe Passing just south of Harare
18°0′S 32°57′E / 18.000°S 32.950°E  Mozambique
18°0′S 37°0′E / 18.000°S 37.000°E Indian Ocean Mozambique Channel
18°0′S 44°1′E / 18.000°S 44.017°E  Madagascar
18°0′S 49°25′E / 18.000°S 49.417°E Indian Ocean
18°0′S 122°11′E / 18.000°S 122.183°E  Australia Western Australia
18°0′S 122°12′E / 18.000°S 122.200°E Indian Ocean Roebuck Bay - passing just south of Broome, Western Australia
18°0′S 122°22′E / 18.000°S 122.367°E  Australia Western Australia
Northern Territory
18°0′S 146°4′E / 18.000°S 146.067°E Coral Sea Passing through  Australia's Coral Sea Islands Territory
Passing just south of Efate island,  Vanuatu
18°0′S 168°42′E / 18.000°S 168.700°E Pacific Ocean
18°0′S 177°16′E / 18.000°S 177.267°E  Fiji Island of Viti Levu
18°0′S 178°38′E / 18.000°S 178.633°E Pacific Ocean Koro Sea
18°0′S 179°14′E / 18.000°S 179.233°E  Fiji Island of Gau
18°0′S 179°21′E / 18.000°S 179.350°E Pacific Ocean Koro Sea
18°0′S 179°3′W / 18.000°S 179.050°W  Fiji Island of Nayau
18°0′S 179°2′W / 18.000°S 179.033°W Pacific Ocean Passing just north of Fonualei,  Tonga
Passing just north of Palmerston Island,  Cook Islands
Passing just south of the islands of Tahiti, Mehetia and Reitoru,  French Polynesia
18°0′S 142°18′W / 18.000°S 142.300°W  French Polynesia Marokau atoll
18°0′S 142°11′W / 18.000°S 142.183°W Pacific Ocean Passing between the atolls of Hao and Amanu,  French Polynesia
18°0′S 70°53′W / 18.000°S 70.883°W  Peru
18°0′S 69°45′W / 18.000°S 69.750°W  Chile
18°0′S 69°9′W / 18.000°S 69.150°W  Bolivia
18°0′S 57°38′W / 18.000°S 57.633°W  Brazil Mato Grosso do Sul
Mato Grosso - for about 11 km
Mato Grosso do Sul - for about 9 km
Mato Grosso - for about 16 km
Mato Grosso do Sul - for about 22 km
Mato Grosso - for about 18 km
Minas Gerais
Espírito Santo
18°0′S 39°29′W / 18.000°S 39.483°W Atlantic Ocean

See also

17th parallel south

The 17th parallel south is a circle of latitude that is 17 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, Africa, the Indian Ocean, Australasia, the Pacific Ocean and South America.

18th parallel

18th parallel may refer to:

18th parallel north, a circle of latitude in the Northern Hemisphere

18th parallel south, a circle of latitude in the Southern Hemisphere

19th parallel south

The 19th parallel south is a circle of latitude that is 19 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, Africa, the Indian Ocean, Australasia, the Pacific Ocean and South America.

Humboldt Current

The Humboldt Current, also called the Peru Current, is a cold, low-salinity ocean current that flows north along the western coast of South America. It is an eastern boundary current flowing in the direction of the equator, and extends 500–1,000 km (310–620 mi) offshore. The Humboldt Current is named after the Prussian naturalist Alexander von Humboldt. In 1846, von Humboldt reported measurements of the cold-water current in his book Cosmos.The current extends from the southern Chile (~45th parallel south) to northern Peru (~4th parallel south) where cold, upwelled waters intersect warm tropical waters to form the Equatorial Front. Sea surface temperatures off the coast of Peru, around 5th parallel south, reach temperatures as low as 16 °C (61 °F). This is highly uncharacteristic of tropical waters, as most other regions have temperatures measuring above 25 °C (77 °F). Upwelling brings nutrients to the surface, which support phytoplankton and ultimately increase biological productivity.The Humboldt Current is a highly productive ecosystem. It is the most productive eastern boundary current system. It accounts for roughly 18-20% of the total worldwide marine fish catch. The species are mostly pelagic: sardines, anchovies and jack mackerel. The system's high productivity supports other important fishery resources as well as marine mammals (eared seals and cetaceans) and seabirds. Periodically, the upwelling that drives the system's productivity is disrupted by the El Niño-Southern Oscillation (ENSO) event, often with large social and economical impacts.

The Humboldt has a considerable cooling influence on the climate of Chile, Peru and Ecuador. It is also largely responsible for the aridity of Atacama Desert in northern Chile and coastal areas of Peru and also of the aridity of southern Ecuador. Marine air is cooled by the current and thus is not conducive to generating precipitation (although clouds and fog are produced).

List of circles of latitude

Following is a list of circles of latitude on Earth.

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