Experiment name: Greenland Sea Project Principal Investigator: K.Aagaard Affiliation: PMEL Mooring name: GSP-1 Mooring position: 74.421 deg N, 2.405 deg E Instrument depth: 3523 meters Seafloor depth: 3750 meters Times: 1600 01 Jul 1988 to 1400 17 May 1989 Time increment: 60 minutes Instrument type: Aanderaa RCM parameter min mean max stddev days speed (cm/sec) 0.00 3.21 13.18 2.05 319.96 dir (deg true) 0.00 154.57 359.98 155.01 319.96 u (cm/sec) -5.20 -0.06 6.28 1.75 319.96 v (cm/sec) -4.75 2.66 12.19 2.08 319.96 temp (deg C) -1.06 -1.04 -1.01 0.00 319.96 The original version of this record contained many cycles in which speed and direction were missing. We believe that these are instances where the current speed was below the instrument's stall speed. In some other cases the given speed was below the Aanderaa RCM's stall speed (which is about 1.1 cm/sec) and the given value of the u or v component was missing. Our best guess is that these and some other impossible measurements ought to be considered instances in which the Aanderaa rotor was not turning, and accordingly we have set both speed and direction to zero in every such case (although, of course, the zero direction is meaningless and merely indicates that we have no information about direction for the cycle). By these criteria, approximately 15.6% of the measurements were below the stall speed.
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