Indirect current measurement

Japanese: 間接測流 - かんせつそくりゅう
Indirect current measurement

…By adjusting the density of the buoys, it is possible to track not only the ocean surface but also the currents at a certain depth. Indirect current measurement is a method of measuring the water temperature and salinity, determining the density distribution, and estimating the current speed from the above-mentioned geostrophic relationship. This is called dynamic calculation, and is widely used because it is convenient, but it cannot be used in shallow oceans or directly under the equator, where the balance of the geostrophic current is not thought to be established. …

*Some of the terminology that refers to "indirect current measurement" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ブイの密度を調整すれば海の表層だけでなくある程度の深さの流れのようすも追跡することができる。 間接測流というのは,水温や塩分を測定し密度分布を求めて上述の地衡流の関係から流速を推算する方法である。これを力学計算といい,便利なので多用されるが,地衡流の釣合いが成立していないと思われる浅い海や赤道直下では使えない。…

※「間接測流」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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