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Mooring (oceanography) : ウィキペディア英語版 | Mooring (oceanography)
A mooring in oceanography is a collection of devices, connected to a wire and anchored on the sea floor. It is the ''Eulerian way'' of measuring ocean currents, since a mooring is stationary at a fixed location. In contrast to that, the ''Lagrangian way'' measures the motion of an oceanographic drifter, see Lagrangian drifter. ==Construction principle== The mooring is held up in the water column with various forms of buoyancy such as glass balls and syntactic foam floats. The attached instrumentation is wide ranging but often includes CTDs (conductivity, temperature depth sensors), current meters (e.g. acoustic Doppler current profilers or deprecated rotor current meters), biological sensors, and other devices to measure various parameters. Long-term moorings can be deployed for durations of two years or more, powered with alkaline or lithium battery packs.
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