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What is going on with Cryosphere Today?? It show a huge increase in sea ice area today


Forum consensus is that it's melt ponds freezing over, Eli (tomorrow will show another uptick and then a small 20K drop).

Read on in that topic. There's some interesting weather coming up. My hunch is that the Northwest Passage main route is going to be completely open.


August 23 figures for extent are down to 5.179 M km^2 and the August decline is very similar for both NSIDC and IJIS. NSIDC has been all over the place. IJIS continues to decline steadily at between 60-70K per day as it has all month with no sign of the rate slowing at this stage.

At this stage I think we are still some way away from the minimum and a late end to the season is probable. Average decline since 2007 from now to minimum is 692K so a fourth lowest finish seems most likely.


The sea ice area shown in a couple of graphs here and here, suggest that area has increased in recent days. I kind of expect area and extent to be the other way round, on occasions. Anyone like to offer an explanation? The only one I can think of is that a large area of ice is becoming very slushy and spreading into previously "open" water, perhaps fooling the area calculations whilst not impacting extent.


Tony, read the second comment.

CT SIA has started to drop again (not showing yet on the graph), albeit slowly, about 40K in the past days. JAXA SIE keeps dropping remarkably steady, around 70K per day. And so compactness is going up sharply. I'll have more on that in the upcoming ASI update at the end of the month.

But right now it's time for cyclone watching over on the ASIF. :-)

John Christensen

Yes, the cyclone entering via Bering should finish off the MYI detachment and provide a good level of compaction in the Western Arctic, lowering SIE significantly, while the SIA should fare slightly better with melting ponds starting to freeze over.


Thanks, Neven and John. Apologies for not taking in the second comment (which I had actually read ... d'oh!).


And what's going on with the southern hemisphere (http://arctic.atmos.uiuc.edu/cryosphere/antarctic.sea.ice.interactive.html)? Anybody knows why it's suddenly so low for this time of the year?


Quick question: Does anyone here specialize in following Antarctic ice?


More bad news: the rather primitive dykes washed away by the actual storm at
Barrow Alaska.

IIRC these “dykes” have (had) been build in 2008, when it became quite clear that due to the massive ice retreat the coast line was in direct danger from August on ...


By the way, there is a full archive of what is going on here at this link:

Barrow Sea(not-yet-ice) images.

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