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Mooring Data
Moored instruments are anchored to the ocean floor. This prevents the instruments from drifting in currents, and enables them to take measurements repeatedly at the same location. This type of sampling is termed Eulerian. After they have been deployed for several months, they can be retrieved and serviced. These units can be equipped with several different instruments depending on what oceanographers are interested in investigating. Most measure temperature and salinity (CTD). Often they are outfitted with a current meter to measure the velocity of water in the area. (A CTD example below)
Moored instruments were deployed in the Chukchi Sea recently as they are useful in measuring the motions of the pack ice. Each unit was equipped with an Acoustic Doppler Current Profiler (ADCP) which uses the Doppler effect to determine the speed of the pack ice as it flows. This works on the same principle as the speed guns utilized by police to check the velocity of passing cars.
This data set was interesting as it showed that the pack ice was still flowing, even after the currents in the water column had slowed down dramatically.
Data Access
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