Deep sea - Shinkai (English spelling) abyss

Japanese: 深海 - しんかい(英語表記)abyss
Deep sea - Shinkai (English spelling) abyss

There is no clear definition of how deep the deep sea is. In oceanography, it generally refers to depths of more than 2000 meters, and is never used to refer to depths shallower than 1000 meters. The English adjective abyssal refers to depths of 300 fathoms (about 540 meters), and in deep-sea fauna, the deep sea refers to depths deeper than the upper limit of the continental slope. In terms of undersea topography, the deep sea floor refers to the ocean floor 2000 to 6000 meters deep, of which the area of ​​the 4000 to 5000 meters deep part is the largest, accounting for about one-third of the entire ocean floor.

[Masao Hanzawa]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

どの程度の深さからを深海というかの明確な定義はない。海洋学では、一般に2000メートルより深い所をさすことが多く、1000メートル以浅に使われることはまずない。英語のabyssalという形容詞は300尋(ひろ)(約540メートル)以深をいい、深海動物相でいう深海は大陸斜面上限以深のものをいう。海底地形の深海底は深さ2000~6000メートルの海底部をさすが、そのうち深さ4000~5000メートルの部分の面積は全海底の約3分の1で、もっとも広い。

[半澤正男]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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