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Re: The Greenland Thread

Unread postPosted: Fri 08 Jun 2018, 21:23:23
by Plantagenet
jawagord wrote:Looks like another big accumulation year for the Greenland Snow Mass Balance.

http://polarportal.dk/fileadmin/polarpo ... 180607.png


As the planet warms there is a tendency for more snow to fall in winter because warmer air can hold more water vapor.

However, there is also a tendency for more ablation to occur in the summer, and the data clearly shows the annual mass balance has been negative almost every year for Greenland for years now, resulting in huge losses in ice volume from this ice sheet.

Cheers!

Re: The Greenland Thread

Unread postPosted: Sat 09 Jun 2018, 08:18:24
by jawagord
Anecdotal comments don't really add much to the discussion when it so easy to find observations to the contrary. Scientist have been studying Greenland for less than 40 years that's not long enough to know how the ice sheets that have existed for millions of years behave, but generally more snow takes longer to melt!

The 2017 melt season was less intense than recent years, and was below average melt in the 1981 to 2010 reference period. Surface melting was particularly low in southeastern Greenland.In general, melting was limited to low elevations (below 1500 meters or 4900 feet) along the western and northeastern coastlines. Fewer melt days than average occurred along the Davis Strait and the interior melt pond region along the central western coast.

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

Re: The Greenland Thread

Unread postPosted: Sat 09 Jun 2018, 10:52:55
by dohboi
Image

Re: The Greenland Thread

Unread postPosted: Mon 11 Jun 2018, 13:23:01
by Plantagenet
jawagord wrote: more snow takes longer to melt!...


Of course. But when the climate is warming, the warmer summers are more than capable of melting "more snow."

You can see this by looking at the overall annual "mass balance" of Greenland. You can't just look at one year and you can't just look at winter snow accumulation---you also have to look at summer melting and ablation. And when you add them together, you see that Greenland is rapidly losing mass because of high summer melting. And the rate of mass loss is increasing---i.e. as it gets warmer more and more ice melts each summer and the entire Greenland Ice Sheet shrinks.

Currently Greenland is losing more than 300 Gt of ice each year through melting.

Check it out.

Image
Cheers!

Re: The Greenland Thread

Unread postPosted: Tue 12 Jun 2018, 09:25:04
by jawagord
Plantagenet wrote:
jawagord wrote: more snow takes longer to melt!...


Of course. But when the climate is warming, the warmer summers are more than capable of melting "more snow."

You can see this by looking at the overall annual "mass balance" of Greenland. You can't just look at one year and you can't just look at winter snow accumulation---you also have to look at summer melting and ablation. And when you add them together, you see that Greenland is rapidly losing mass because of high summer melting. And the rate of mass loss is increasing---i.e. as it gets warmer more and more ice melts each summer and the entire Greenland Ice Sheet shrinks.

Currently Greenland is losing more than 300 Gt of ice each year through melting.

Check it out.

Image
Cheers!


Plant I did check it out months ago, see my old posts, at current rates it will take 15,000 years for all the ice to melt. That won’t happen of course as earth will be well into the next glaciation cycle in a few 1000 years and then humans won’t be worrying about melting.

Re: The Greenland Thread

Unread postPosted: Wed 13 Jun 2018, 07:27:59
by kanon
Plant I did check it out months ago, see my old posts, at current rates it will take 15,000 years for all the ice to melt.

What happens if it rains? What is the possibility of a hurricane moving over Greenland and dropping a lot of liquid water? I suspect the chances of that type event are increasing.

Re: The Greenland Thread

Unread postPosted: Wed 13 Jun 2018, 08:19:22
by dohboi
Good point, k.

There are good reasons to expect things to go very non-linear in the not-too distant future in Greenland...lots of feedbacks. But for that very reason, rather hard to model.

Re: The Greenland Thread

Unread postPosted: Thu 14 Jun 2018, 02:59:29
by kiwichick

Re: The Greenland Thread

Unread postPosted: Thu 14 Jun 2018, 11:03:33
by dohboi
Yeah, I just saw that and posted it on the Antarctic thread.

There will be more and more 'surprises' like this going forward, that is until the fascists manage to cut off all funding for anymore studies like this, essentially gouging out our eyes just as we are flying into the outskirts of the biggest shitstorm of all time... :twisted: