Peru Current


Peru Current
a cold Pacific Ocean current flowing N along the coasts of Chile and Peru. Also called Humboldt Current.

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also called  Humboldt Current,  

      cold-water current of the southeast Pacific Ocean, with a width of about 900 km (550 mi). Relatively slow and shallow, it transports only 350,000,000–700,000,000 cu ft (10,000,000–20,000,000 cu m) of water per second. It is an eastern boundary current similar to the California Current of the North Pacific. The West Wind Drift (Antarctic Circumpolar Current) flows east toward South America south of latitude 40° S, and while most of it continues through the Drake Passage around the southern tip of South America to the Atlantic, a shallow stream turns north to parallel the continent as far as latitude 4° S, where it turns west to join the Pacific South Equatorial Current.

      As it is a cold current, except at times of the phenomenon known as El Niño (q.v.), the Peru Current brings fog to the nearby coast but also helps to keep the coast one of the most intensely arid areas in the world. The cold flow is intensified by upwelling of deep water caused by the combined effects of the drag of surface winds of the Southeast Trades and the Earth's rotation. Upwelling brings abundant nutrients close to the surface, and the beneficial effects of sunlight, which allow for rich plankton growth, make the waters off Peru, Chile, and Ecuador one of the world's greatest fishing grounds for anchovies and the larger fish (e.g., tuna) that feed upon them. Another economic benefit is the guano, used for fertilizer, deposited by the flocks of birds that feed on the anchovies.

      The current's alternative name is taken from that of the German scientist Alexander von Humboldt, who in 1802 took measurements that showed the coldness of the flow in relation to the air above it and the sea around it.

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Universalium. 2010.

Look at other dictionaries:

  • Peru current — n. HUMBOLDT CURRENT …   English World dictionary

  • Peru Current — a cold Pacific Ocean current flowing N along the coasts of Chile and Peru. Also called Humboldt Current. * * * Peru Current, a cool ocean current of the Pacific which flows northward along the west coast of South America; Humboldt Current …   Useful english dictionary

  • Peru Current — Peru′ Cur′rent n. a cold Pacific Ocean current flowing N along the coasts of Chile and Peru Also called Humboldt Current …   From formal English to slang

  • Peru Current — /pəru ˈkʌrənt/ (say puhrooh kuruhnt) noun → Humboldt Current …   Australian English dictionary

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