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Analysis: ‘Another Antarctic Sea Level Rise False Alarm’ – Climate fear claims ‘grievously wrong’

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Another Antarctic Sea Level Rise False Alarm

http://judithcurry.com/2016/05/22/another-antarctic-sea-level-rise-false-alarm

by Rud Istvan Aitken et. al. in Nature newly comports to confirm 2015 fears about instability of the Totten Glacier in Eastern Antarctica. This could ‘suddenly’ raise sea level as much as 4 meters! (Or, based on the abstract, maybe only 0.9 meters in ‘modern scale configuration’, but over 2 meters [2.9-4] in unspecified other configurations). There are two parts to the story of Aitken et. al. 2016: the author’s comments as reported by MSM, and what the paper actually found. Media reports An example from the Weather Channel: “An Antarctic glacier three-fourths the size of Texas continues to melt into the sea, and if it disappears completely, sea levels will rise dramatically around the world, a new study says. The Totten Glacier is melting quickly in eastern Antarctica and threatens to become yet another point of concern as global temperatures rise, according to the study published in the journal Nature. It’s getting close to a “tipping point,” the study found, and if the glacier collapses, global sea levels could rise nearly 10 feet…”I predict that before the end of the century the great global cities of our planet near the sea will have two- or three-meter (6.5 to 10 feet) high sea defenses all around them,” study author Martin Siegert told the French Press Agency.” [Bolds mine] From Science Daily, drawn from the Imperial College London press release: Current rates of climate change could trigger instability in a major Antarctic glacier, ultimately leading to more than 2m of sea-level rise. By studying the history of Totten’s advances and retreats, researchers have discovered that if climate change continues unabated, the glacier could cross a critical threshold within the next century, entering an irreversible period of very rapid retreat. This would cause it to withdraw up to 300 kilometres inland in the following centuries and release vast quantities of water, contributing up to 2.9 metres to global sea-level rise. [Bolds mine] Finally, the lurid title of Chris Mooney’s article in the WaPo on May 18: ‘Fundamentally unstable’: Scientists confirm their fears about East Antarctica’s biggest glacier Paper Most of the paper is a complex analysis of detailed gravimetric and magnetic data captured from low pass aircraft mapping an important ridge component of Totten’s subglacial geology. It is helpful to understand the context for seeking evidence of alarming seal level rise (SLR) (see my previous CE post Sea Level Rise Tipping Points). SLR is not accelerating, so warmunists have searched for future ice sheet ‘tipping points’ that might cause the abrupt SLR supporting urgent CO2 mitigation. Greenland was the initial focus; it is not cooperating because of its bowl shaped geology. See my previous post for details and references. The West Antarctic Ice Sheet (WAIS) was the next focal point. The Ronne Ice Shelf proved pinned and stable per the above linked Tipping Points guest post. ANDRILL showed that the Ross Ice Shelf is also stable; its grounding line hasn’t shifted for about 4 millennia, ditto the Tipping Points sites linked to above. Attention then shifted to the Amundsen Embayment, where much was made in 2014 of the flowing Pine Island Glacier (PIG)–until it was pointed out PIG sits on an active volcano that has nothing to do with global warming. (There are volcanic ash layers embedded in PIG.) WAIS is not cooperating, either. So attention has now shifted to the East Antarctic Ice Sheet (EAIS) where Totten is the biggest glacier/catchment basin, almost half of the above figure’s NASA defined geological sector (which also contains the Moscow University Ice Shelf and the Frost glacier) just ‘east’ of the Wilkes Land sector in the figure below. Where Totten enters the Southern Ocean, it is mostly grounded in shallows

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