Prediction and Measurement of the Stability of the IWEX Tripod Mooring.
WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS
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The three-dimensional array of sensors for the Internal Wave Experiment IWEX was supported on a tripod mooring rising from the sea floor to a height of 5 km in mid-ocean of 5-12 km water depth. The mooring was so designed that the current-induced motions of the mooring would be small. Computer simulation was used for optimizing the mooring design to achieve this purpose. Nine precision pressure recorders were deployed at selected positions on the mooring and the results of analysis of the records are presented. The local tide time series is generated and subtracted from the pressure records to obtain the vertical excursions of the mooring. A five-term expression is used to convert pressure measured in decibars to depth in meters. The predicted displacements and the measured values are compared and found to agree. The mooring motion was found in general to be small enough to contribute insignificant noise to the velocity measurements.
- Physical and Dynamic Oceanography