Y current - définition. Qu'est-ce que Y current
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Qu'est-ce (qui) est Y current - définition

COLD, LOW-SALINITY EASTERN BOUNDARY CURRENT THAT FLOWS NORTH ALONG THE WESTERN COAST OF SOUTH AMERICA FROM SOUTHERN CHILE TO NORTHERN PERU
Peru Current; Humboldt cold current; Humboldt current; Peru (Humboldt) Current
  • Humboldt Current
  • access-date=8 December 2014}}</ref>

Y current      
·add. ·- The current through one branch of the star arrangement of a three-phase circuit.
Current (fluid)         
MAGNITUDE AND DIRECTION OF FLOW IN A FLUID
Current (water); Water current
A current in a fluid is the magnitude and direction of flow within that fluid, such as a liquid or a gas.
Amperage         
  • symbol]] for a battery in a [[circuit diagram]].
  • Alternating electric current flows through the solenoid, producing a changing magnetic field. This field causes an electric current to flow in the wire loop by [[electromagnetic induction]].
  • Magnetic field is produced by an electric current in a [[solenoid]].
  • A [[proton conductor]] in a static [[electric field]].
FLOW OF ELECTRIC CHARGE (FOR SPECIFIC QUANTITIES SEE Q29996 OR Q234072)
Amperage; Electrical current; Conventional current; Electric Current; Electrical Current; Electric polarity; Electrical Polarity; Current (electric); Electric currents; Electric conduction; Electrical conduction in gases; Current (electricity); Electron current; AC/DC (electrical); Electrical polarity; Ion flow; Current electricity; Current (electrical); Dynamic electricity; Conduction current; Conventional current flow; AC/DC (electricity); Electric current intensity; DC polarity; Reverse polarity; + pole; Plus pole; Minus pole; − pole; - pole; Electron flow; Positive (electrical polarity); Negative (electrical polarity); Electric current measurement
Current intensity expressed in amperes, as an amperage of ten amperes.

Wikipédia

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 German naturalist Alexander von Humboldt even though it was discovered by José de Acosta 250 years before Humboldt. In 1846, von Humboldt reported measurements of the cold-water current in his book Cosmos.

The current extends from 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 economic 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).