Ocean Microstructure Profiling

Microstructure measurements are made using our loosely-tethered free-fall microstructure profiler. The profiler samples precision CTD, body acceleration, microstructure temperature, pre-emphasized temperature gradient, microstructure conductivity and shear Microstructure measurements are made using an ISW MSS90 microstructure profiler. The profiler samples precision CTD, body acceleration, microstructure temperature, pre-emphasized temperature gradient, microstructure conductivity and shear (with two independent airfoil probes aligned parallel to each other). The sensors point downward when the instrument profiles vertically, and all sample at 1024 Hz to 16 bit resolution. An earlier version of the profiler is described by Prandke and Stips (1998) and results from a recent ProClim survey have been reported in Fer (2006). The profiler is 1.4 m long and 106 mm in diameter and weighs 8 kg in air, hence easily handled by one person. The instrument is ballasted to free-fall at a typical fall speed of 0.5-0.8 m s-1 and is decoupled from operation induced tension by paying out cable at sufficient speed to keep it slack.


MSS system on board R/V Lance before deployment in the Marginal Ice Zone of the Barents Sea- CABANERA 2005 cruise (Photo by Arild Sundfjord).


Deployment from ice using motor-driven winch. VanMijen fjorden Svalbard, March 2004 (Photo by Arild Sundfjord)


Deployment from ice using manual winch. Kongsfjorden, Svalbard. April 2005 (photos by Karolina Widell).

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