Experiment name: Hi Lat Dyn: Beaufort Sea Principal Investigator: K.Aagaard Affiliation: U of Washington Mooring name: AM1-91 Mooring position: 70.549 deg N, 140.027 deg W Instrument depth: 83 meters Seafloor depth: 713 meters Times: 2300 17 Sep 1991 to 1400 12 Sep 1992 Time increment: 60 minutes Instrument type: TSR parameter min mean max stddev days temp (deg C) -1.62 -1.42 -1.11 0.05 360.67 pressure (db) 83.15 84.39 109.08 2.52 360.67 cond (mmho/cm) 25.63 26.07 26.37 0.10 360.67 salinity (PSU) 31.94 32.52 32.91 0.13 360.67 The pressure record contains an odd excursion on 29 Dec 91. The same depth change is found in the record from the TSR 101 meters deeper on this mooring. In fact, we can say that the two pressure records are identical with the exception of an offset of exactly 101 decibars. In other words, one of them was created by adding or subtracting 101 decibars to or from the other. They are not independent measurements. Although nominally the two instruments were 101 meters apart, experience teaches that line stretch and differing degrees of blowover will cause the separation between any two instruments on the same mooring to vary. In this case it does not vary by so much as 0.01 db, which is the precision of the measurement.
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