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The evaluation of salinity measurements from PALACE floats
Bacon, S.; Centurioni, L.R.; Gould, W.J. (2001). The evaluation of salinity measurements from PALACE floats. J. Atmos. Oceanic. Technol. 18: 1258-1266
In: Journal of Atmospheric and Oceanic Technology. American Meteorological Society: Boston, MA. ISSN 0739-0572, more
Peer reviewed article  

Available in  Authors 

Keywords
    Salinity measurement; Marine

Authors  Top 
  • Bacon, S.
  • Centurioni, L.R.
  • Gould, W.J.

Abstract
    Seven PALACE (Profiling Autonomous Lagrangian Circulation Explorer) floats were deployed in October 1996 in the Irminger Basin of the Atlantic Ocean as a U.K. contribution to the World Ocean Circulation Experiment. Of these floats, four were fitted with a conductivity-temperature-depth package. The floats were ballasted to drift at a depth of about 1500 m, above the Labrador Sea Water (LSW) cold and fresh extreme, and programmed to surface every 14 days. The floats made a profile during each ascent to the surface. The authors present a method to evaluate the performance of the conductivity sensors and to calibrate the float salinity data. Since the LSW appears to be relatively stable over a timescale of ~1-2 months and a length scale of ~50-100 km, the authors were able to make direct comparisons between the first year of float data and accurate ship-based measurements and, therefore, were able to correct for errors of the conductivity sensors. A correction was applied in all cases. The conductivity sensors were all stable within, or very close to, the manufacturer's specification, with a maximum drift for salinity of (0.0009 ± 0.0004) month-1.

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