If the feature arrowed in the image below is not a processing artifact, then Petermann Glacier is setting itself up for yet another major calving event. Further data is needed to support my suggestion that this is either a real fissure or the beginnings of one.
Petermann Glacier June 19 2013
Unmodified part of of 250m scale satellite image,
source:
http://rapidfire.sci.gsfc.nasa.gov/imagery/subsets/?subset=Arctic_r03c03.2013170.aqua.250m
Below is an enhanced image showing that there are possibly two fissures. I repeat that this new feature needs to be confirmed from other images.
Petermann Glacier June 19 2013
zoomed and enhanced image.
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