inverted echo sounder

Japanese: inverted echo sounder(英語表記)invertedechosounder
inverted echo sounder

...A sonic wave gauge is installed on the ocean floor and measures the change in wave height by the time it takes for sound waves to be reflected off the ocean surface and return. However, as the water gets deeper, it is affected by the change in the speed of sound. This is used to detect the movement of warm and cold water masses, and the IES (inverted echo sounder) is being developed in Japan as well. [Taira Keisuke]...

*Some of the terminology that mentions "inverted echo sounder" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…海底に設置し音波が海面で反射されてもどるまでの時間により波高の変化を求める音波波高計は,水深が大きくなると音速の変化の影響を受ける。これを利用して暖水塊や冷水塊の移動を検出するのがIES(inverted echo sounder)で,日本でも開発が進められている。【平 啓介】。…

※「inverted echo sounder」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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