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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 sea ice ： ウィキペディア英語版 Antarctic sea ice Antarctic sea ice is the sea ice of the Southern Ocean. It extends far north in winter and retreats almost to the coastline each summer. Sea ice freezes from seawater, and is usually less than a few meters thick. It should not be confused with the ice shelves, which are formed by glaciers flowing out into the sea and floating free of the bottom (these can be up to a kilometer thick). There are two subdivisions of sea ice: fast ice, which is attached to land; and ice floes, which are not. Sea ice in the Southern Ocean is often snow-covered, and generally melts from below, unlike Arctic ice, so it rarely has meltponds on its surface. On average, Antarctic sea ice is younger, thinner, warmer, saltier, and more mobile than Arctic sea ice.〔http://ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_Chapter04_FINAL.pdf〕 Due to its inaccessibility, it is not as well-studied as Arctic ice. == Measurements of sea ice == (詳細はウィキペディア（Wikipedia）』 ■ウィキペディアで「Antarctic sea ice」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.