Bathyal zone

Japanese: bathyal zone(英語表記)bathyalzone
Bathyal zone

In marine biology, the deep sea refers to a depth of 200m or more, with the bathyal zone (or archibenthal zone) at 200-3000m, the abyssal zone at 3000m to the ocean floor (less than about 6000m), and the hadal zone (or ultra-abyssal zone) at any depth beyond that. From the viewpoint of ocean structure, the surface layer (also called the surface mixed layer) is subject to seasonal changes from the ocean surface to a depth of 200m, and the main ocean layer, where the temperature drops rapidly, is located at a depth of 200-1000m, and then gradually drops from 1000-3000m, and remains almost constant below 3000m.

*Some terminology that mentions "bathyal zone" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…海洋生物学では深海deep‐seaとは,水深200m以深をいい,200~3000mを漸深海帯bathyal zone(もしくはarchibenthal zone),3000m~大洋底(約6000m以浅)を深海帯abyssal zone,それ以深の海溝部を超深海帯hadal zone(もしくはultra‐abyssal zone)という。海洋の構造のうえから見ると,海表面から深度200mまでは季節変化を受け表層(表面混合層とも)と呼ばれ,それ以深200~1000mに温度が急激に下降する主躍層があり,1000~3000mまでは徐々に下降し,3000m以深はほぼ一定である。…

※「bathyal zone」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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