Ocean floor permafrost

Japanese: 海洋底永久凍土 - かいようていえいきゅうとうど
Ocean floor permafrost

…Discontinuous permafrost is found up to about 50° north latitude, where the annual mean temperature coincides with an isotherm of about 0°C. Permafrost also extends to the continental shelf of the Arctic Ocean, where it is called ocean floor permafrost. Incidentally, scattered permafrost is also found in mid-latitudes, and in Japan it exists on Mount Daisetsu and the summit of Mount Fuji. …

*Some of the terminology used to refer to "ocean permafrost" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…不連続的永久凍土は北緯50゜付近まで見られ,年平均気温が約0℃の等温線に一致する。永久凍土は北極海の大陸棚にも延びており,海洋底永久凍土と呼ばれる。ちなみに中緯度にも点在的永久凍土があり,日本でも大雪山や富士山頂に存在する。…

※「海洋底永久凍土」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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