Another very valuable comment in today's 2010 vs 2007 Uni Bremen Comparison blog post pointed me to a considerable partial disintegration of the ice bridge in McClure Strait. This is the last part of the direct route of the Northwest Passage, and, excepting the large amounts of ice floes in Melville Sound and Parry Channel (which are easily blown out towards the warmer waters of Baffin Bay, see image), the only thing that is preventing a very early opening of the Northwest Passage this year.
I had already been saving images this past week because of the reasonably clear skies over much of the Canadian Archipelago, and together with this latest image they show the break-off very nicely:
Notice also the breaking off of floes in McClintock Channel in the middle left of the image. I'll be updating this image the coming few days, so we can see what is happening to those ice floes and the rest of the ice bridge.
Update June 29th: Added yesterday's image (day 179). Some floes are breaking off at the bottom of the ice bridge. Check Nick Barnes' comments below for further observations.
Update June 30th: Added yesterday's image (day 180).
Update July 1st: Added yesterday's image (day 181).
Update July 2nd: Added yesterday's image (day 182). Nick Barnes has commented in the SIE update 10 thread:
Check out today's Terra image for the crack showing the next big loss at the eastern end of the ice bridge in the NWP: a big triangle of ice, with its base across the whole of Viscount Melville Sound (about 140km N/S, and maybe 60km E/W). The Aqua image shows that two more triangles are ready to come after that, after which there'll be about 150-200km of ice bridge remaining in the deepwater channel. The other side of Stefansson Island, there's another 30km chunk breaking off in the McClintock Channel.
The eastern end of the ice bridge in the picture is the lower end. Maybe I should rotate the image?
Update July 3rd: Added yesterday's image (day 183). Ice floes keep breaking off.
Update July 4th: Added yesterday's image (day 184). There's some serious cracking going on in the eastern side (lower side of the picture) of Melville Sound.
Update July 5th: I've made a new and improved animation. No more updates here.