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Jim Hunt

Thanks for all your hard work on the ASIG Neven!

Just a reminder that for the last few weeks I've been updating the Great White Con resources section :)

This part is particularly interesting just at the moment:


By way of example:

Click the image for a larger version, including the Chukchi Sea also.


That's right, Jim. I had forgotten you have a great segment on your blog with images and animations. I'll put a link on the ASIG to that.

Bill Fothergill

Just got back from a low-tech holiday in France - no phone, no computer and a diet that consisted almost entirely of bread, cheese, cakes, porridge, beer and wine. (Nothing like a healthy diet, eh?)

Looking at the updated ASIG page (nice one, Neven) I see that the Arctic Data Archive System VISHOP portal (the IJIS/JAXA replacement) has been replaced by a bloody Twitter feed. Does anyone have the URL enabling access to their sea ice extent chart? The interactive features were amongst the best I have seen, and it would be a pity if it is no longer available.

Given that there was some discussion on an earlier thread concerning physical processes pertaining to sea ice, might it also be an idea to include on the ASIG page some links to resources other than graphs or datasets?

I was thinking in particular of something like the NSIDC's "All About Sea Ice" portal, located at...

To many of the people who comment regularly here, this would be pretty elementary stuff, but it would provide a sort of "Sea Ice 101" for newcomers.

For example, the concept of Freezing Degree Days as a rough proxy metric indicating likely ice growth is something that anybody commenting here should be aware of. I happen to know that the relevant section (Thermodynamics) was updated about 4 years ago, as it was me that provided the NSIDC with an appropriate errata list.

Cheers Bill F

Jim Hunt

Welcome back to Blighty Bill!

VISHOP is down. Back RSN apparently:


Jim Hunt


"Might it also be an idea to include on the ASIG page some links to resources other than graphs or datasets?"

Might be an idea for GWC also. What does the team think should be on the list?

In the meantime I'll get even busier......


Dean B

Forgive what might be a stupid question, but does anyone think its strange that the surface air temperature anomaly in the forcasts maps above have the northern part of Alaska and Canada at 20C above normal for the next 7 days, and that although the artic ice next to those bits are high, there only about 10c higher than normal. So does that mean that their is no snow/ice on those bits of Canada and Alaska, and if so is that normal for this time of the year.

Seke Rob

Dean B, visit Rutgers global snow lab at http://climate.rutgers.edu/snowcover/ Yes, Alaska and NW Canada are substantially snow free.

Chris Reynolds


The latest snow cover is from Rutgers.

But that only takes us up to early May. At that time there was snow there.

However there is MODIS.

And that does indeed show a lot of snow free land in the region of greatest warming as you suspect.


And here's the anomaly (red):

Unfortunately I can't link to this image on the ASIG Daily Graphs page, but there are other snow cover maps there that show the same (you have to scroll down a bit to the Snow Cover segment.


Dean, these forecasts maps are all for O:00 GMT which makes 3pm in Alaska or so, for each and all maps. Those mountains look lit at +20C but they only so for a few hours (precisely afternoon).
Reason why temps along Eurasian coast also zero or negative in all maps.
You have to mentally factor out the daily cycle, or go to the reanalyzer www to see the 3-hourly forecasts.


Regarding temperatures in arctic Canada, Inuvik just hit 26.9 C / 80.4 F (a new monthly record all-time hottest temperature there during May according to the Wikipedia page for Inuvik), and Tuktoyaktuk just hit 21.7 C / 71.1 F (a new monthly record all-time hottest temperature there during May according to the Wikipedia page for Tuktoyaktuk).

Jim Hunt

Neven - Thanks very much for the link to GWC. Here's my response:


It looks suspiciously as though you were one of the very first people ever to go swimming in Santa's Secret Summer Swimming Pool!

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