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Post by graywolf on Nov 29, 2017 17:04:46 GMT
This thing with marine cliff failure is you do not know it's about to manifest until it does? As we all know both P.I.G. and Thwaites are sat atop ridges that then rapidly fall away into the inland basin ( the ocean passage between east and west Antarctica once the ice goes?) so any new retreat ( not a natural calve but one pushing the grounding line further inland?) is likely to push us closer to the majik 100m max for ice cliff stability. If we do begin a Jakobshavn type collapse then it will progress far faster than we see on Greenland where tolerances are more slender And cliff heights more marginal?
Once the process begins it cannot be stopped until the basin is emptied. That is a lot of ice in a very short span of time.
2017, being another low max year when the ozone hole healed more than expected, looks to test the stability of all the remaining shelfs with early sea ice retreat meaning longer under the swells of a very busy southern Ocean. We will see what the ice behind the LarsenC calve does in response. If fohn melting along the surface has exploited crevasses , as we saw in LarsenB, then we could see rapid collapse of the remaining shelf there?
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Post by sigurdur on Nov 29, 2017 17:10:21 GMT
Rapid collapsing is the order of centuries.
Just like 90,%+ of Greenland's ice sheet, the area in question is young. Past behavior clearly indicates at the appex of the Holocene, sea levels will be 10+M higher than present. It won't make any difference what CO2 emissions are, it is going to happen.
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Post by nautonnier on Mar 13, 2018 11:04:18 GMT
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Post by Ratty on Mar 13, 2018 12:55:03 GMT
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birder
Level 3 Rank
Posts: 223
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Post by birder on Apr 9, 2018 15:51:14 GMT
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Post by Ratty on Apr 9, 2018 20:54:39 GMT
I was worried about the headline but it seems we are all still going to drown. That's a relief .....
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Post by nautonnier on Apr 9, 2018 21:07:04 GMT
I was worried about the headline but it seems we are all still going to drown. That's a relief ..... It will be colder water though Ratty
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Post by acidohm on Jun 14, 2018 15:59:18 GMT
Antarctic ice loss has tripled in a decade. If that continues, we are in serious trouble[ This is doing the rounds right now!! I'm taking with a pinch of salt...in any case, tripling something is meaningless...needs quantification and makes for a stupid headline. What if we had headlines explaining how many fewer hurricanes and tornados affected the US..."HALF AS MANY HURRICANES HIT THE US IN 18 YEARS!!!" or to describe winter's "EUROPE HAS QUADRUPLE THE SNOW FORECAST BY EXPERTS 10 YEARS AGO" It's a meaningless headline designed to push the doctrine.
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Post by nautonnier on Jun 14, 2018 17:41:53 GMT
Antarctic ice loss has tripled in a decade. If that continues, we are in serious trouble[ This is doing the rounds right now!! I'm taking with a pinch of salt...in any case, tripling something is meaningless...needs quantification and makes for a stupid headline. What if we had headlines explaining how many fewer hurricanes and tornados affected the US..."HALF AS MANY HURRICANES HIT THE US IN 18 YEARS!!!" or to describe winter's "EUROPE HAS QUADRUPLE THE SNOW FORECAST BY EXPERTS 10 YEARS AGO" It's a meaningless headline designed to push the doctrine. "Good News! 99.989% of the Antarctic Ice Sheet Didn’t Melt!" wattsupwiththat.com/2018/06/14/good-news-99-989-of-the-antarctic-ice-sheet-didnt-melt/
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Post by sigurdur on Nov 21, 2018 5:49:30 GMT
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Post by Ratty on Nov 21, 2018 8:12:13 GMT
That makes it definitive then. No ifs or maybes: We're all gonna drown.
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Post by nautonnier on Nov 21, 2018 10:04:29 GMT
Except that: - Sea level rise has not been increasing. - Temperatures in Antarctica have been reaching record lows The only area of Antarctica that is showing signs of 'warming' is a relatively small area immediately over volcanic action The premises of this article are incorrect.
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Post by Ratty on Nov 21, 2018 12:14:36 GMT
Except that: - Sea level rise has not been increasing. - Temperatures in Antarctica have been reaching record lows The only area of Antarctica that is showing signs of 'warming' is a relatively small area immediately over volcanic action The premises of this article are incorrect. Phew. That's a relief.
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Post by sigurdur on Nov 23, 2018 21:03:17 GMT
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Post by nautonnier on Dec 15, 2018 9:44:39 GMT
"Panic time: a tiny 0.01% of Antarctica, resting on volcanoes, melts five times faster than nothing
Let this go down as a prime example of Big Meaningless Numbers used to scare you: Antarctica’s ice melts five times faster than usual Ben Webster – The Times (copied at The Australian) Antarctica has lost an area of ice the size of Greater London since 2010 as warmer ocean water erodes its floating edge, a study has found. Overall about 1,463 sq km of Antarctica’s underwater ice melted between 2010 and 2016. What does 1,463 fewer square kilometers of ice mean? The findings suggest that melting glaciers on the continent could add significantly to long-term sea level rises, with severe implications for thousands of coastal towns and cities. Your house might wash away. Or not. How close to zero can a number be and still be “a number”? The total area of Antarctic sea ice averages about 11 million square kilometers. So that’s one part in 7,500 that melted or 0.013%. But volume is what matters and the percentage of volume that melted is even smaller. Let’s assume ice volume was lost to a depth of one kilometer (the depth of the “grounding line” where the ice-sheet meets the earth). The giant Antarctic Ice Sheet itself covers 14 million square kilometers and is two kilometers thick, so there are 29 million cubic kilometers of ice there (not counting the sea ice). The volume that melted in this breathtaking news is 0.005% of that. If this six year long trend keeps up, Antarctica will melt in 118,933 years. Quick, build a windfarm."joannenova.com.au/2018/04/panic-time-a-tiny-0-01-of-antarctica-resting-on-volcanoes-melts-five-times-faster-than-nothing/
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