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Data - Buoy data from the BGEP project
During the JWACS 2003 cruise, 4 ice beacons
were deployed in a radial section through the BG upstream of
the moorings, so that the ice drift will transport the buoys
past the moorings. METOCEAN expendable ice beacons suspend 3
SeaBird MicroCats at 15, 25 and 40 m depths (the deepest MicroCat
also has a pressure sensor to determine depth), interrogate
each sensor twice per day, and broadcast the data via Argos,
which also provides each drifter’s location. These ice
drift timeseries are immediately made available to the IABP
and GTS. The temperature and salinity data are updated daily
on the BGFE website.
Due to relatively thin ice conditions during August, it was
difficult to find multiyear icefloes thicker than 2 m. Large
icefloes were selected during the cruise from RADARSAT maps
and ice reconnaissance flights on helicopter. The actual buoy
deployment site was selected after augering several small holes
at different locations, on other sides of consolidated ridges.
Typically, the ice thickness was about 1.5 m, with the bottom
half saturated with water. Somewhat thicker ice was generally
found in areas surrounded by ridges.
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