Experiment name: not available Principal Investigator: not available PI's affiliation: Scottish Mar Bio Assn Mooring Name: not available Mooring position: 57.263 deg N, 10.362 deg W Instrument depth: 47 meters Seafloor depth: 2229 meters Times: starts 12 Apr 1981, ends 15 Oct 1981 Time increment: 30 minutes Instrument type: Aanderaa parameter min mean max sd days speed (cm/sec) 0.00 24.23 63.20 11.07 185.8 dir (deg true) 0.00 164.77 359.02 84.00 185.8 u (cm/sec) -45.80 2.59 60.65 18.10 185.8 v (cm/sec) -56.93 -7.40 53.09 17.91 185.8 temp (deg C) 8.95 9.92 11.08 0.41 185.8 pressure (db) 118.70 145.25 467.90 35.40 185.8 BODC has provided the following cautionary note: The pressure measurements are only suitable for relative depth confirmation and for evaluation of the motion of the mooring system. The pressure record shows that the rig suffered knock-down on occasions throughout the deployment; the most severe displacement of this meter was of the order of 300m and occured during 30 to 31 May 81 and on 5 Aug 81. Our comment: This record was made with an Aanderaa current meter. The nominal speed threshhold of this meter is 1.5 cm/sec, and a common practice is to set below-threshhold speeds either to the threshhold value or to half the threshhold. In this case, however, below-threshhold speeds were set to zero by the originating PI, as were concurrent directions. In processing historical data we normally reset below- threshhold Aanderaa speeds to half the threshhold, but have not done so in this case because the direction information has been lost.
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