Le courant de Leeuwin est un courant océanique tropical, formé d'eaux chaudes à faible salinité, pauvres en nutriments, qui suit la côte ouest de l'Australie, influençant la faune et la flore marines, ainsi que le climat du sud-ouest de l'Australie et de la Tasmanie. Suivi sur plus de 5 000 km, c'est le plus long courant côtier continu identifié à ce jour,.

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  • Le courant de Leeuwin est un courant océanique tropical, formé d'eaux chaudes à faible salinité, pauvres en nutriments, qui suit la côte ouest de l'Australie, influençant la faune et la flore marines, ainsi que le climat du sud-ouest de l'Australie et de la Tasmanie. Suivi sur plus de 5 000 km, c'est le plus long courant côtier continu identifié à ce jour,. Il tient dans une mince bande de 50 km de large et de 200 à 250 m de profondeur, circulant le long du bord extérieur du plateau continental
  • La corriente de Leeuwin es una corriente oceánica cálida que fluye hacia el este cerca de la costa occidental de Australia. Rodea el cabo Leeuwin para entrar en las aguas al sur de Australia donde su influencia se extiende hasta Tasmania. La corriente australiana del Oeste y la Contra-Corriente australiana meridional, que son producidas por la Corriente Circumpolar Antártica en el Océano Índico meridional y en Tasmania, respectivamente, fluyen en dirección opuesta, produciendo uno de los más interesantes sistemas de corrientes oceánicos del mundo. Su fuerza varía a través del año; es más débil durante los meses de verano (invierno en Europa) de noviembre a marzo cuando los vientos tienden a soplar fuertemente desde el suroeste hacia el norte. El mayor flujo es en el otoño y el invierno (de marzo a noviembre) cuando los vientos opuestos son más débiles. La evaporación de la corriente de Leeuwin durante este período contribuye en gran medida a la lluvia en la región suroeste de Australia Occidental. Típicament la velocidd de la corriente de Leeuwin y sus remolinos son de alrededor de 1 nudo (50 cm/s), aunque son normales velocidades de dos nudos (1 m/s), y la mayor velocidad registrada por una boya seguida por satélite fueron 3,5 nudos a la hora (6,5 km/h). La corriente de Leeuwin es poco profunda para un gran sistema de corriente, por estándares globales, siendo de unos 300 metros de profundidad, y que en lo alto de una Contra-Corriente dirección norte llamada la Contra-Corriente (o "corriente subyacente") de Leeuwin.
  • The Leeuwin Current is a warm ocean current which flows southwards near the western coast of Australia. It rounds Cape Leeuwin to enter the waters south of Australia where its influence extends as far as Tasmania. The West Australian Current and Southern Australian Countercurrent, which are produced by the West Wind Drift on the southern Indian Ocean and at Tasmania, respectively, flow in the opposite direction, producing one of the most interesting oceanic current systems in the world. Its strength varies through the year; it is weakest during the summer months (winter in Europe) from November to March when the winds tend to blow strongly from the south west northwards. The greatest flow is in the autumn and winter (March to November) when the opposing winds are weakest. Evaporation from the Leeuwin current during this period contributes greatly to the rainfall in the southwest region of Western Australia. Typically the Leeuwin Current's speed and its eddies are about 1 knot (50 cm/s), although speeds of 2 knots (1 m/s) are common, and the highest speed ever recorded by a drifting satellite-tracked buoy was 3.5 knots (6.5 km/h). The Leeuwin Current is shallow for a major current system, by global standards, being about 300 m deep, and lies on top of a northwards countercurrent called the Leeuwin Undercurrent.The Leeuwin Current is very different from the cooler, equatorward flowing currents found along coasts at equivalent latitudes such as the southwest African Coast (the Benguela Current); the long Chile-Peru Coast (the Humboldt Current), where upwelling of cool nutrient-rich waters from below the surface results in some of the most productive fisheries; the California Current, which brings foggy conditions to San Francisco; or the cool Canary current of North Africa. Because of the Leeuwin Current, the continental shelf waters of Western Australia are warmer in winter and cooler in summer than the corresponding regions off the other continents. The Leeuwin Current is also responsible for the presence of the most southerly true corals at the Abrolhos Islands and the transport of tropical marine species down the west coast and across into the Great Australian Bight. The ‘core’ of the Leeuwin Current can generally be detected as a peak in the surface temperature with a strong temperature decrease further offshore. The surface temperature difference across the Current is about 1°C at North West Cape, 2° to 3° at Fremantle and can be over 4° off Albany in the Great Australian Bight. The current frequently breaks out to sea, forming both clockwise and anti-clockwise eddies.The Leeuwin Current is influenced by El Niño conditions, characterised by slightly lower sea temperatures along the Western Australian coast and a weaker Leeuwin Current, with corresponding effects upon rainfall patterns.The existence of the current was first suggested by William Saville-Kent in 1897. Saville-Kent noted the presence of warm tropical water offshore in the Houtman Abrolhos, making the water there in winter much warmer than inshore at the adjacent coast. The existence of the current was confirmed over the years, but not characterised and named until Cresswell and Golding did so in the 1980s.
  • Leeuwingo itsaslasterra Australiako mendebaldeko kostatik hurbil ekialderantz higitzen den itsaslaster epel bat da. Leeuwin lurmuturra inguratzen du, eta Australiako hegoaldeko uretara iristen da. Han, Tasmaniaraino iristen da haren eragina. Mendebaldeko Australiako itsaslasterrak, eta Hego Australiako kontralasterrak (biak Itsaslaster Zirkunpolar Antartikoak sortuak Indiako ozeanoaren hegoaldean eta Tasmanian, hurrenez hurren) kontrako noranzkoarekin igarotzen dira, eta munduko itsaslaster-sistemarik interesgarrienetako bat sortzen dute.Itsaslasterraren indarra aldatu egiten da urtean zehar: udako hilabeteetan (alegia, Europan neguan denean), azarotik martxora, ahulagoa da, haizeek hego-mendebaldetik iparralderantz jotzen baitute indartsu. Udazkenean eta neguan, berriz, (martxotik azarora), fluxu handiagoa du, kontrako haizeak ahulagoak baitira orduan. Sasoi horretan lurruntzen den Leeuwingo itsaslasterraren urari zor zaio, neurri handi batean, Mendebaldeko Australia estatuko hego-mendebaldeko euria.Leeuwingo itsaslasterraren ohiko abiadura 50 cm/s da, baina 1 m/s-ko abiadura ere izaten du maiz. Inoiz neurtu zaion abiadurarik handiena 6,5 km/h izan zen, satelitez jarraitutako buia baten bidez lortua. Leeuwingo itsaslasterra aski azala da, 300 bat metroko sakoneran higitzen baita.Itsaslasterraren existentziaren berri 1897an eman zuen William Saville-Kent-ek, ohartu baitzen ur tropikal epela zegoela Houtman Abrolhos uharteetan, Australiako mendebaldean, eta, ondorioz, neguan, inguru haietako ura inguruko kostetakoa baino nabarmen epelagoa zela. Itsaslasterraren existentzia berretsi egin zen hurrengo urteetan, baina haren ezaugarriak ez ziren lortu 1980ko hamarkada arte (Cresswell eta Golding ikertzaileen lanari esker); izena ere orduan eman zitzaion.
  • Leeuwinův proud (en: Leeuwin Current) je teplý mořský proud tekoucí od rovníku jižním směrem okolo západního a jižního pobřeží Austrálie.
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  • Le courant de Leeuwin est un courant océanique tropical, formé d'eaux chaudes à faible salinité, pauvres en nutriments, qui suit la côte ouest de l'Australie, influençant la faune et la flore marines, ainsi que le climat du sud-ouest de l'Australie et de la Tasmanie. Suivi sur plus de 5 000 km, c'est le plus long courant côtier continu identifié à ce jour,.
  • Leeuwinův proud (en: Leeuwin Current) je teplý mořský proud tekoucí od rovníku jižním směrem okolo západního a jižního pobřeží Austrálie.
  • La corriente de Leeuwin es una corriente oceánica cálida que fluye hacia el este cerca de la costa occidental de Australia. Rodea el cabo Leeuwin para entrar en las aguas al sur de Australia donde su influencia se extiende hasta Tasmania.
  • The Leeuwin Current is a warm ocean current which flows southwards near the western coast of Australia. It rounds Cape Leeuwin to enter the waters south of Australia where its influence extends as far as Tasmania. The West Australian Current and Southern Australian Countercurrent, which are produced by the West Wind Drift on the southern Indian Ocean and at Tasmania, respectively, flow in the opposite direction, producing one of the most interesting oceanic current systems in the world.
  • Leeuwingo itsaslasterra Australiako mendebaldeko kostatik hurbil ekialderantz higitzen den itsaslaster epel bat da. Leeuwin lurmuturra inguratzen du, eta Australiako hegoaldeko uretara iristen da. Han, Tasmaniaraino iristen da haren eragina.
rdfs:label
  • Courant de Leeuwin
  • Corriente de Leeuwin
  • Leeuwin Current
  • Leeuwingo itsaslasterra
  • Leeuwinův proud
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