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sjn
Intermediate Crude
Joined: Mar 09, 2005
Posts: 568
Location: UK
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 Posted: Mon Jul 07, 2008 4:27 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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| GregWatson wrote: | Flushing of multi-year sea ice from the Arctic basin
http://www.homerdixon.com/download/arctic_flushing.html
This amazing video shows the dynamics of the North polar ice cap movement. Note the North pole ends up covered with first year ice as the older multi year ice, which was at the North pole during the 2007 record melt, moves toward the Atlantic. The video of this year in full will be interesting to watch.
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That was actually posted to this thread (the earlier incarnation anyway) some time ago. It's clearly why the melt is occuring in a different pattern to last season. The ice has clearly been far more mobile with large part of it very thin a providing little resistance to flowing. | Quote: |
Flushing of multi-year sea ice from the Arctic basin
http://www.homerdixon.com/download/arctic_flushing.html
This amazing video shows the dynamics of the North polar ice cap movement. Note the North pole ends up covered with first year ice as the older multi year ice, which was at the North pole during the 2007 record melt, moves toward the Atlantic. The video of this year in full will be interesting to watch.
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Indeed it's still continuing. If compare recent images of the Siberian coastal sea ice concentration you can observe high concentration ice floes still moving and filling in any space opened up. |
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GregWatson
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Joined: Jun 07, 2008
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| Posted: Mon Jul 07, 2008 5:05 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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| sjn wrote: | | Some of the nearer objects appear to have shifted slightly too, so there may be shearing occuring on the weather station's "ice island". |
Yup, tearing the weather station ice floe apart via floe to floe contact stress as well as internal surface melting and being weaken by many worm whole like surface water melt moulins.
If you look closely at the blinker and factor out the shadow differences, you can make out what look like long longitudinal cracks in the ice floe. Shall we call this quasi real time web cam sequence "Prelude to the Death of an Ice Floe"?
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GregWatson
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Joined: Jun 07, 2008
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| Posted: Mon Jul 07, 2008 8:26 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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Here are the NSIDC Arctic ice cap melt concentration images at 1/4 second intervals from 1st June 2008 to 6th July 2008. Use Pause to Pause and the Left / Right arrow keys to move back and forward through the images.
You can see the ice floe movements quite clearly. From this I can understand why the NSICD guys feel the North pole will be ice free this summer.
http://www.greenandgoldenergy.com.au/images/ArcticIceCapMeltSummer2008.exe
As you will see by 6th July, the remaining ice is getting sparse and melting is starting on the North Pacific side. We have more than 2 months to go until mid Sept when the minimum should occur. Should be spectacular to say the least. I'll update the above file every week with the latest NSIDC images.
If anybody is interested I have another such file with all of 2008 at 0.2 sec intervals but it is 18MBs.
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sjn
Intermediate Crude
Joined: Mar 09, 2005
Posts: 568
Location: UK
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| Posted: Mon Jul 07, 2008 10:58 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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| GregWatson wrote: | Here are the NSIDC Arctic ice cap melt concentration images at 1/4 second intervals from 1st June 2008 to 6th July 2008. Use Pause to Pause and the Left / Right arrow keys to move back and forward through the images.
You can see the ice floe movements quite clearly. From this I can understand why the NSICD guys feel the North pole will be ice free this summer.
http://www.greenandgoldenergy.com.au/images/ArcticIceCapMeltSummer2008.exe
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For Linux users, this does work under the current version of Wine. |
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GregWatson
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BlinkBlink
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Joined: Dec 27, 2005
Posts: 119
Location: Australia
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| Posted: Mon Jul 07, 2008 7:15 pm Post subject: Re: Record Ice Loss in Arctic 2008 |
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Thanks. Excellent video.
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sjn
Intermediate Crude
Joined: Mar 09, 2005
Posts: 568
Location: UK
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| Posted: Wed Jul 09, 2008 7:27 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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Looks like the North Pole weather station has become unanchored:
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Bas
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Joined: Mar 26, 2005
Posts: 3772
Location: over here
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| Posted: Thu Jul 10, 2008 10:27 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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looks like we will be going into rapid melt mode anytime now, if not already; lots of slushpuppy red:
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Dan1195
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Joined: Mar 19, 2005
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| Posted: Thu Jul 10, 2008 2:20 pm Post subject: Re: Record Ice Loss in Arctic 2008 |
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| We are now beyond the time where there was the rapid melt down last year. Not that it still will not occur, but to this point the weather patterns that we saw in the Arctic last summer have not materialized, giving some hope that a significant portion of that first year ice will remain. |
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Bas
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| Posted: Thu Jul 10, 2008 3:59 pm Post subject: Re: Record Ice Loss in Arctic 2008 |
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| Dan1195 wrote: | | We are now beyond the time where there was the rapid melt down last year. Not that it still will not occur, but to this point the weather patterns that we saw in the Arctic last summer have not materialized, giving some hope that a significant portion of that first year ice will remain. |
true enough, and that's what I thought a week ago, but right now things aren't looking pretty, but then again I'm not a polar expert, at most a good amateur 
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dorlomin
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dorlomin
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Joined: Aug 05, 2007
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| Posted: Sun Jul 13, 2008 10:39 am Post subject: Re: Record Ice Loss in Arctic 2008 |
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http://news.bbc.co.uk/1/hi/sci/tech/7503060.stm
| Quote: | Twenty Russian scientists are to be evacuated from their camp on a drifting ice-floe in the Arctic after it started disintegrating sooner than expected.
The Russians had set up research station "North Pole 35" on the floe last September when it measured a safe five kilometres long and three kilometres wide, and their original plan was to stay on it until this September.
But after enduring the permanent night of the Arctic winter and surviving the threat of polar bears, the scientists now find that their temporary home has shrunk to just 600m by 300m and faces complete break-up as it drifts towards a current known to contain relatively warm waters. |
| Quote: | | Separate teams of scientists in Canada and the US have forecast that this year's seasonal melt of Arctic sea-ice may well reach or exceed last year's record thaw in which the ice retreated to an extent not predicted for several decades. |
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Troyboy1208
Intermediate Crude
Joined: Apr 26, 2006
Posts: 513
Location: Orlando FL
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| Posted: Sun Jul 13, 2008 3:05 pm Post subject: Re: Record Ice Loss in Arctic 2008 |
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Well well the Cryosphere has some new snappy imagery on their mainpage. Check it out:
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dorlomin
Light Sweet Crude
Joined: Aug 05, 2007
Posts: 1062
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| Posted: Sun Jul 13, 2008 3:31 pm Post subject: Re: Record Ice Loss in Arctic 2008 |
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| it reminds me of something one might see on Psilocybin. |
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xironman
Tar Sands
Joined: Mar 13, 2007
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