WHOI Ice Tethered Profiler #8

The ITP profiler was configured to operate with a standard sampling schedule of 2 one-way profiles between 7 and 760 m depth each day and the GPS receiver was powered every hour to obtain locations, and buoy temperature and battery voltage status were recorded. Full vertical profiler data was reliably acquired and transmitted for the first 707 profiles (354 days) until an apparent problem with the inductive modem communications prevented data exchange between the underwater and surface packages.

However, the surface package continued to transmit GPS locations and status, and the profiler continued to ring the surface unit after every attempted profile up until July 30, 2009. Upon retrieval of the instrument, data from an additional 862 attempted profiles was recovered. Over the two year period, the ITP encircled the perimeter of the anticyclonic Beaufort Gyre.