"We can't allow things that are inaccurate to stand." — The Word of Our Dan, February 19, 2008.

Saturday, July 30, 2011

Petermania (X): Pirouette

The Petermann Ice Island stalled out in a big way overnight, making barely five kilometres of ground, shedding some mass (visible here as a scattering of "small" icebergs) and pivoting 90 degrees so that its pointy end is now aimed at Quirpon, which lies about 30 kilometres to the west. (Newfoundland and southern Labrador coastline vectors added to bring clarity to cloud-obscured reference points.)

Source image: NASA/GSFC, Rapid Response

The stall-and-pivot manoeuvre, and increased calving activity, are both likely explained by an intimate encounter with Tooker Bank, off the southern entrance to the Strait of Belle Isle, where there are least depths of as little as 14 fathoms. Even the outer slopes of Tooker Bank would easily be shallow enough for the several hundred feet depth of Petermann ice to catch on.



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