SciTech

Greenland Ice Sheet Melting

novy.

Posted to SciTech on Wed Jul 25, 2012 at 11:57:28 AM EST (promoted from Diaries by port1080). RSS.

97% of Greenland's ice sheet suddenly began to melt over four days in early July. Hey, no big deal, some melting occurs every 150 years or so.

Greenland's "freakishly warm" summer ("beyond t-shirt weather") may or may not have anything to do with "global warming", so we can all go back to business as usual, eh? I mean, who knows what causes heat domes anyway? Certainly not NASA, although NASA scientists said what everyone could have expected. Dr Poul Christoffersen, glaciologist and engineer at Scott Polar Institute in Cambridge, said

"The melting seen in the satellite data is unprecedented, as it extends all the way across the ice sheet including the summit, which is located 3,200m above sea level. Melting is usually limited to less than 2000m elevation. The observation is in my view much more important than the recently reported break up of a large iceberg from Petermann Glacier."
Nasa's Tom Wagner added
"This event, combined with other natural but uncommon phenomena, such as the large calving event last week on Petermann Glacier, are part of a complex story."
Very complex. Way too complex for us ordinary folks to understand.

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1

Re: Greenland Ice Sheet Melting

Haggis.

Wed Jul 25, 2012 at 10:07:42 AM EST

5.00 (witty)

The story is a bit less alarming than your overheated headline.  They claim to have noticed that the total surface of the Greenland ice sheet that has melted increased from a normal 40% to 97% this summer.  That does not mean that 97% of the ice covering Greenland has melted, just that 97% of the surface area has detected some melting (which normally freezes back fairly quickly given the thousands of feet of ice under the surface.

I am shitfitter; hear me roar.

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Re: Greenland Ice Sheet Melting

novy.

Wed Jul 25, 2012 at 10:16:37 AM EST

none

"Overheated" headline. Excellent.

Indeed, most of it now has been refreezing. OTOH, NASA really did call this degree of melting "unprecedented".

It has been 2.6 million years since Greenland or Antarctica didn't have ice sheets, so if either one actually completely melted, it would be Huge News even if it didn't wipe out coastal cities across this planet with giant tsunamis.

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Re: Greenland Ice Sheet Melting

improper.

Wed Jul 25, 2012 at 10:21:53 AM EST

none

Nice pun.

4

Albedo Feedback

Shy Elf.

Wed Jul 25, 2012 at 12:04:00 PM EST

5.00 (informative)

It's all about the albedo feedback.  Snow reflects visible light and is still black in infrared.  The less snow there is, the more heat is absorbed, and the less snow there is.  Especially if you're talking about less snow early in the summer.  At the solstice, the Arctic gets more incident sunlight heat than the Sahara.  Yeah, that's at top of the atmosphere and it's going to be a bit less at the surface, but not much.

The regions where warm Arctic water flows in don't reset over the winter any more, and open water in winter is starting to move east along the Russian coast.

The sea ice area never recovered from 2007, when there was a very rare event with a lot of heat flowing in from the Pacific.  This shows that the system is pretty close to critically balanced.  The ice volume is just getting smaller, which can be seen not only in the modeled volume but in the record area/extent ratio this year, which shows that the ice is more broken up than ever before and is a purely observational indicator of thinner ice.

Greenland is high enough that not much air flows over it, so it pretty much makes its own weather.  And it's rapidly getting darker too, which probably has a lot to do with why there there were 5 days above freezing at Summit (usually coldest point in Greenland) this year, compared with 4 recorded before this year, with 1-2 more likely coming this weekend.

Or it might have something to do with persistent water temperatures in the 50s in much of Baffin Bay.

Move along, now.  Nothing to see here.  Ain't no such thing as global warming.

5

Re: Greenland Ice Sheet Melting

Ephraim Gadsby.

Wed Jul 25, 2012 at 01:55:48 PM EST

none

Those who say Global Warming is real don't act like it's real; they keep doing completely unnecessary things which are environmentally harmful, like this.

6

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Re: Greenland Ice Sheet Melting

novy.

Wed Jul 25, 2012 at 04:03:23 PM EST

none

Oh, please. Every president gets treated like that. But if your current president was Republican, it would all be OK because he wouldn't believe in global warming anyway, right?

7

Re: Greenland Ice Sheet Melting

Ephraim Gadsby.

Thu Jul 26, 2012 at 04:04:53 PM EST

none

8

Sudden Thought: That's terrible

thefadd.

Thu Jul 26, 2012 at 06:22:57 PM EST

none

Second thought: what are gun control and healthcare laws in Norway ;-)

I HAD HAD SEX WITH HUNTER S THOMPSON. HE CAME IN MY MOUTH AND I SWALLOWED IT. I SHOULD HAVE HAD HIS BABY. WE WOULD BE BALLIN' LIKE KOBE'S SON!!

9

Re: Greenland Ice Sheet Melting

Otto Maddox.

Fri Jul 27, 2012 at 09:57:29 PM EST

none

The abandonment of the now extinct "appearance of propriety" ideal, now mutating to the "fuck erring on the side of caution" ethic.

"It is difficult to get a man to understand something if his salary depends on his not understanding it" ~Sinclair

10

Re: Greenland Ice Sheet Melting

Otto Maddox.

Sun Jul 29, 2012 at 10:32:26 AM EST

none

Koch funded study converts climate change skeptic

"It is difficult to get a man to understand something if his salary depends on his not understanding it" ~Sinclair

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Re: Greenland Ice Sheet Melting

Tim Burr.

Mon Jul 30, 2012 at 06:41:13 PM EST

none

Thank you Otto Maddox for posting the above article. I was just thinking of posting it but you had already done so. I was linked to it today by the LATimes which has been doing excellent reporting on environmental issues this past decade, as far as main stream media outlets are concerned  

What frightens me the most is nobody gives a shit. A shitty death on a planet with maniacal assholes in charge seems to be alright. That is how jaded billions of people are.

Are our we really that naive? Earth's atmosphere has been portrayed to be extremely complex and beyond the comprehension of an average human for decades. We are finding out that the obviousness of our actions is really not too complex.

Demand accountability with politicians, industry and your current government. I've been asking them for decades now,  "When are you going to get responsible for our planet"?

The free pass on the environment has to stop.

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