Results from field programs on multi-year ice August 2009 and May 2010

M. Johnston
Ten multi-year ice floes sampled in the high Arctic in late summer 2009 and spring 2010 are described. Ice thickness obtained from detailed dirl hole profiles indicated average floe ticknesses from 3.4 to 14.7 m (±1.3 to 4.3 m). A maximum tichness of 21.1 m was measured, which was limit of the two-person drill team, however the sail height of some other features on the floes suggested much ticker ice. Voids, pockets and loose blocks...
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