英和和英

出典:『Wikipedia』 (2011/07/20 11:44 UTC 版)

英語による解説

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Oyashio (親潮, Parental Tide^?), also known as Oya Siwo, Okhotsk or the Kurile current, is a cold subarctic ocean current that flows south and circulates counterclockwise in the western North Pacific Ocean. It collides with the Kuroshio Current off the eastern shore of Japan to form the North Pacific Current (or Drift). This cold current flows through Bering Strait in the southern direction and transports cold water of the Arctic Sea into the Pacific ocean. The waters of the Oyashio Current originate in the Arctic Ocean and flow southward via the Bering Sea. The current has an important impact on the climate of the Russian Far East, mainly in Kamchatka and Chukotka, where the northern limit of tree growth is moved up to ten degrees south of the latitude it can reach in inland Siberia. The waters of the Oyashio Current form probably the richest fishery in the world owing to the extremely high nutrient content of the cold water and the very high tides (up to ten metres) in some areas - which further enhances the availability of nutrients. However, the Oyashio Current also causes Vladivostok to be the most equatorward port to seasonally freeze and require icebreaking ships to remain open in winter. Nonetheless, this has relatively little effect on the fish yield through the Sea of Okhotsk because the large tides mean freezing does not occur so easily.