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Neven

Speaking of collapses, the fast ice between the Lena Delta and the New Siberian Islands is totally disintegrating, same time as last year.

George Phillies

I am extremely grateful to you for finding this, but in this 'covers several screens each way' document I am not sure what I am looking at.

For the benefit of those of us who are a bit slower at aerial reconnaissance, could you possibly be persuaded to say roughly where in those beautiful photos the ice arch is? Thank you.

crandles

It just about the centre of the image.

North is down and to the left if that helps your orientation.

me.yahoo.com/a/nSjChi4X3vr8X3DRw93GkY1.cerja.8nvWk-

The piece that's broken away is the white triangular piece suurounded by blue sea, yesterday that gap on the upper right was just a crack.
Phil.

me.yahoo.com/a/nSjChi4X3vr8X3DRw93GkY1.cerja.8nvWk-

Here's a detail from this mornings Aqua image, you can see the development from the shot that Neven showed at the opening of this thread.

Phil.

http://i302.photobucket.com/albums/nn107/Sprintstar400/Icearch.jpg

Neven

George, there are two ways to check satellite images (three ways actually).

The easy way is by going to the LANCE-MODIS Arctic Mosaic. The Mosaic is divided up in quadrants that you can click on. Once you do that, you can choose what resolution you want (1 km, for instance, means that every pixel is 1 km). By default images from the Terra satellite are shown. You can however also opt for images from the Aqua satellite, which has the images a bit earlier than Terra.

Arctic.io also has a special webpage that allows you to zoom in and out (no quadrants). Make sure you have the date right. Once you have zoomed in to where you want to go, you can actually save a permalink that you can paste anywhere you want to show people something you saw (example: Svalbard today).

The final option is the most interesting if you want satellite images hot off the press. This is where that link in the second comment leads to: the MODIS near real time (orbit swath) images. You see everything first here, but it takes a bit of practice to get the hang of it.

Patrick Lockerby wrote a tutorial about this two years ago: MODIS Rapidfire for citizen scientists. The best way to learn how it works with these satellite images is to just play around.

These images are one of the greatest gifts from the Internet. Who would have thought 10 or 20 years ago that mere mortals would be able to look at the Earth in near real time?

Espen Olsen

Neven:

I appreciate you mentioning our mentor Patrick Lockerby, who by the way was the first to tell the world about the big Petermann calving a few years ago,although someone else grasped the honors, I wonder what Patrick is up to, but I for sure wish him all well. Regards espen

Neven

Well said, Espen.

crandles

A fourth option for images around Greenland is to go to
http://ocean.dmi.dk/arctic/kane.uk.php
to get a choice of about 6 images per day.

George Phillies

I am profoundly grateful to all of you for all the advice. For those of you looking at the big picture, is is on the left side of the screen, about half way down, and the breakaway is I gather moving from left to right.

On Phil's gorgeous morning shot, note also the fine additional line behind the breakup. It starts at the bottom of the screen, a bit to the right of center, and heads off in the two o'clock direction.

George Phillies

Indeed, Crandles has another superb link, for example the

http://ocean.dmi.dk/arctic/Ittoqqortoormiit.uk.php

Ittoqqortoormiit
MODIS/AQUA
2012-06-28

shot, where the ice on east Greenland has pulled away entirely from the coast, and if you look at the upper left corner of the shot you can see what appear to be cracks forming at the inland end of the fjord (or whatever it actually is).

It's incredibly neat, but I lack the time.

Neven

That's a nice and clear image!

Tor Bejnar

Today, MODIS shows that Nares Strait ice is breaking in front of (even up "stream" of) Pettermann Glacier. The Kane Basin, per DMI's Greenland Images site, is full of floes working their way southward. The one huge floe might stop traffic for a while!

Christoffer Ladstein

The Narwhales on the other hand will like this, thus being able to travel further north:-).

Shortfatape

Anyone else really curious about what happens with that big crack on the Petermann this summer?

Seke Rob

hrmmm http://ocean.dmi.dk/arctic/kane.uk.php

Push Kane and Kennedy cadres to see traffic flowing, but Lincoln is still stuck at the tail end from what I can see for the 5th.

I Ballantinegray1

Is it me or is there an awful lot of open water compared to the amount of 'space' the final collapse of the southern arch provided?

I'm sure we have all been monitoring the collapse and so know that it's been slow and painful on it's arrival meanwhile the ice between the 'Peterman arch' and the southern arch has just vapourised?

I only mention this as I'm tending toward using 'Nares' as a guide to the breakup of the NW Passage and from what I think I'm seeing here we can expect a lot of the ice in the passage to also melt out and not be dependant on being 'shipped out' to clear the channel?

Broadening this further I have to wonder at the state of the F.Y. ice in the basin as a whole. how close must we now be to it's complete melt out in situ?

Christoffer Ladstein

The weather in the Canadien Acrchipelago lately have been just insanely hot, watching through the eyes of MODIS, the contrast between the barren snowless (soon also iceless if this continues...)land and the still mostly icecovered straits, just is baffling!

So I tend to agree with you, Ballantinegray1, much of the ice will just melt down in situ.

Still, albedo and weatherregime in Nunavut & Northwest Territories are not comparative to the conditions closer to the pole...but alas, the ice is thin and "winds of change" and currents may prove me wrong;-).

me.yahoo.com/a/nSjChi4X3vr8X3DRw93GkY1.cerja.8nvWk-

Not only has the ice in the Nares strait broken up and is starting to flow south but today the ice at the mouth of the Petermann glacier has started to breakup.

Phil.

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