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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Antarctic Convergence ： ウィキペディア英語版 Antarctic Convergence The Antarctic Convergence is a curve continuously encircling Antarctica where cold, northward-flowing Antarctic waters meet the relatively warmer waters of the subantarctic. Antarctic waters predominantly sink beneath subantarctic waters, while associated zones of mixing and upwelling create a zone very high in marine productivity, especially for Antarctic krill. This line, like the Arctic tree line, is a natural boundary rather than an artificial one like a line of latitude. It not only separates two hydrological regions, but also separates areas of distinctive marine life associations and of different climates. There is no Arctic equivalent, due to the amount of land surrounding the northern polar region. ==History== The Antarctic Convergence was first crossed by Anthony de la Roché in 1675,〔R.K. Headland, ''The Island of South Georgia'', Cambridge University Press, 1984.〕 and described by Sir Edmund Halley in 1700.〔Alan Gurney, ''Below the Convergence: Voyages Toward Antarctica, 1699-1839'', Penguin Books, New York, 1998.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Antarctic Convergence」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.