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Ocean Warming May Cause West Antarctic Ice Sheet Loss

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  Ocean Warming May Cause West Antarctic Ice Sheet Loss Sam Wormley <swormley1@gmail.com> - 2015-11-03 14:50 -0600
    Re: Ocean Warming May Cause West Antarctic Ice Sheet Loss benj <none@gmail.com> - 2015-11-04 18:23 -0500
    Re: Ocean Warming May Cause West Antarctic Ice Sheet Loss Wally W. <ww84wa@aim.com> - 2015-11-04 22:52 -0500
    Re: Ocean Warming May Cause West Antarctic Ice Sheet Loss jimp@specsol.spam.sux.com - 2015-11-05 04:24 +0000

#530196 — Ocean Warming May Cause West Antarctic Ice Sheet Loss

Ocean Warming May Cause West Antarctic Ice Sheet Loss
> http://www.reportingclimatescience.com/news-stories/article/ocean-warming-may-cause-west-antarctic-ice-sheet-loss.html

> From the Potsdam Institute for Climate Impact Research
>
> The huge West Antarctic ice sheet would collapse completely if the
> comparatively small Amundsen Basin is destabilized, scientists of the
> Potsdam Institute for Climate Impact Research find. A full discharge
> of ice into the ocean is calculated to yield about 3 meters of
> sea-level rise. Recent studies indicated that this area of the ice
> continent is already losing stability, making it the first element in
> the climate system about to tip. The new publication for the first
> time shows the inevitable consequence of such an event. According to
> the computer simulations, a few decades of ocean warming can start an
> ice loss that continues for centuries or even millennia.

> Abstract
>
> The future evolution of the Antarctic Ice Sheet represents the
> largest uncertainty in sea-level projections of this and upcoming
> centuries. Recently, satellite observations and high-resolution
> simulations have suggested the initiation of an ice-sheet instability
> in the Amundsen Sea sector of West Antarctica, caused by the last
> decades’ enhanced basal ice-shelf melting. Whether this localized
> destabilization will yield a full discharge of marine ice from West
> Antarctica, associated with a global sea-level rise of more than 3 m,
> or whether the ice loss is limited by ice dynamics and topographic
> features, is unclear. Here we show that in the Parallel Ice Sheet
> Model, a local destabilization causes a complete disintegration of
> the marine ice in West Antarctica. In our simulations, at 5-km
> horizontal resolution, the region disequilibrates after 60 y of
> currently observed melt rates. Thereafter, the marine ice-sheet
> instability fully unfolds and is not halted by topographic features.
> In fact, the ice loss in Amundsen Sea sector shifts the catchment's
> ice divide toward the Filchner–Ronne and Ross ice shelves, which
> initiates grounding-line retreat there. Our simulations suggest that
> if a destabilization of Amundsen Sea sector has indeed been
> initiated, Antarctica will irrevocably contribute at least 3 m to
> global sea-level rise during the coming centuries to millennia.
>
> Citation
>
> Collapse of the West Antarctic Ice Sheet after local destabilization
> of the Amundsen Basin by Johannes Feldmann andAnders Levermann
> published in the Proceedings of the National Academy of Sciences
> (PNAS, Online Early Edition) DOI: 10.1073/pnas.1512482112.


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#530435

On 11/03/2015 03:50 PM, Sam Wormley wrote:
> Ocean Warming May Cause West Antarctic Ice Sheet Loss
>> http://www.reportingclimatescience.com/news-stories/article/ocean-warming-may-cause-west-antarctic-ice-sheet-loss.html
>>
>
>> From the Potsdam Institute for Climate Impact Research
>>
>> The huge West Antarctic ice sheet would collapse completely if the
>> comparatively small Amundsen Basin is destabilized, scientists of the
>> Potsdam Institute for Climate Impact Research find. A full discharge
>> of ice into the ocean is calculated to yield about 3 meters of
>> sea-level rise. Recent studies indicated that this area of the ice
>> continent is already losing stability, making it the first element in
>> the climate system about to tip. The new publication for the first
>> time shows the inevitable consequence of such an event. According to
>> the computer simulations, a few decades of ocean warming can start an
>> ice loss that continues for centuries or even millennia.
>
>> Abstract
>>
>> The future evolution of the Antarctic Ice Sheet represents the
>> largest uncertainty in sea-level projections of this and upcoming
>> centuries. Recently, satellite observations and high-resolution
>> simulations have suggested the initiation of an ice-sheet instability
>> in the Amundsen Sea sector of West Antarctica, caused by the last
>> decades’ enhanced basal ice-shelf melting. Whether this localized
>> destabilization will yield a full discharge of marine ice from West
>> Antarctica, associated with a global sea-level rise of more than 3 m,
>> or whether the ice loss is limited by ice dynamics and topographic
>> features, is unclear. Here we show that in the Parallel Ice Sheet
>> Model, a local destabilization causes a complete disintegration of
>> the marine ice in West Antarctica. In our simulations, at 5-km
>> horizontal resolution, the region disequilibrates after 60 y of
>> currently observed melt rates. Thereafter, the marine ice-sheet
>> instability fully unfolds and is not halted by topographic features.
>> In fact, the ice loss in Amundsen Sea sector shifts the catchment's
>> ice divide toward the Filchner–Ronne and Ross ice shelves, which
>> initiates grounding-line retreat there. Our simulations suggest that
>> if a destabilization of Amundsen Sea sector has indeed been
>> initiated, Antarctica will irrevocably contribute at least 3 m to
>> global sea-level rise during the coming centuries to millennia.
>>
>> Citation
>>
>> Collapse of the West Antarctic Ice Sheet after local destabilization
>> of the Amundsen Basin by Johannes Feldmann andAnders Levermann
>> published in the Proceedings of the National Academy of Sciences
>> (PNAS, Online Early Edition) DOI: 10.1073/pnas.1512482112.
>

Sam, computer models show that climate change MIGHT cause monkeys to fly 
out of your ass.



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#530498

On Tue, 3 Nov 2015 14:50:15 -0600, Sam Wormley wrote:

>Ocean Warming May Cause West Antarctic Ice Sheet Loss

Or it may not.

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#530503

Sam Wormley <swormley1@gmail.com> wrote:
> Ocean Warming May Cause West Antarctic Ice Sheet Loss

Latest data says Antarctic Ice is increasing.


-- 
Jim Pennino

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