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Messages - sqwazw

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Are there any studies on what happens as the ice weight is reduced?

Google: "Isostatic rebound"

Northern continental areas that were previously glaciated have good long baseline geodetic GPS surveys of this effect and many nice maps. It runs from a couple of mm's to cm's per year uplift due to the current post glacial rebound. The earths rocky crust can be thought of as "a warm plastic" and gravity induced stress and strains deform it macroscopically over the course of thousands of years after the TeraTonnes of ice have been melted away.


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Policy and solutions / Re: Other earth observation forums
« on: July 09, 2017, 03:31:32 AM »
Not a forum as such, but back in my undergraduate days I often referred to the IRIS Seismic Monitor, part of an NSF institute out of Washington.

http://ds.iris.edu/seismon/

The arctic has very little of concern tectonically but I check it for quake magnitudes whenever anything significant occurs, (Indonesia, Japan, Chile). They also have some 3D products for places like California IIRC - if you click a little deeper you can lose half a day on there easily, http://www.iris.edu.

I Note that the tsunami in Greenland a few weeks back didn't register, suggesting the tremor reported may have been due to the earthen movement of the landslip itself. (?)

Also, completely off topic now, you can see the North Korean Nuclear underground tests appear when they occur, I think their processing lag and confirmation normally delays the map view by 3-6 hours or so.

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Arctic Background / Re: Arctic Maps
« on: June 16, 2017, 06:20:16 AM »
Not exactly a map, but it is pretty. Heres an exaggerated relief map of the bering strait, (High summer in 2021 by the looks of the ice):



Credit to reddit the front page for upvoting this.

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Greenland and Arctic Circle / Re: What's new in Greenland?
« on: April 04, 2017, 04:23:22 AM »
NSIDC's greenland-today is back online for 2017. No action yet.

http://nsidc.org/greenland-today/

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Antarctica / abc australia article about antarctic sea ice plunge
« on: September 21, 2016, 12:28:44 PM »
Anecdotal thinning shelves near Mawson and Davis in Antarctica:

http://www.abc.net.au/news/2016-09-21/sea-ice-record-retreat-has-antarctic-experts-worried/7865732

"Often the first voyage of the season is quite challenging getting close to Davis [station] so from a long way out we'll encounter ice some [160 to 320 kilometres] and that can be hard to get through," he said.

"With any luck that ability to get closer to the station will be easier.

"But it could be we don't have good enough ice beside the station in which to park the ship and unload our cargo onto the ice."

He said equipment may have to be dismantled and flown in to bases like Davis.

"We can use our helicopters to get our equipment and people onshore if the ice isn't good enough to drive on, however obviously we can't get our heavy equipment to shore in that case," Mr Clifton said.

Earlier this week a vehicle travelling outside Mawson station broke through a thin section of sea ice, but no one was hurt.

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