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Gulf Stream et Kuroshio : quand les continents bloquent le passage

Depuis les Antilles jusqu'au large de Terre-Neuve, le Gulf Stream est l'un des premiers courants à avoir été étudié de façon scientifique, de par son importance pour la navigation transatlantique. Durant son parcours, il passe de 25° à 2°C, réchauffant au passage l'eau et l'atmosphère, et chargeant celle-ci d'humidité. Ce courant chaud, comme le Kuroshio (son équivalent dans le Pacifique), est un courant de bord ouest, formé par les vents d'est. On y observe de fortes turbulences, et des variations de direction, de vitesse et de température très fortes. Les courant des Aiguilles, du Brésil... dans l'hémisphère sud sont similaires.

 

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