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Sea Level Rise Pt. 2

Re: Sea Level Rise Pt. 2

Unread postby dohboi » Tue 21 Nov 2017, 14:07:51

More on why sea level is likely to rise above standard projections within the century:

grist.org/article/antarctica-doomsday-glaciers-could-flood-coastal-cities/

Doomsday on Ice

Rapid collapse of Antarctic glaciers could flood coastal cities by the end of this century.


By Eric Holthaus on Nov 21, 2017

"The only place in the world where you can see ice-cliff instability in action today is at Jakobshavn glacier in Greenland, one of the fastest-collapsing glaciers in the world. DeConto says that to construct their model, they took the collapse rate of Jakobshavn, cut it in half to be extra conservative, then applied it to Thwaites and Pine Island."
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Re: Sea Level Rise Pt. 2

Unread postby dohboi » Fri 01 Dec 2017, 19:42:13

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Re: Sea Level Rise Pt. 2

Unread postby Plantagenet » Fri 01 Dec 2017, 20:15:25

dohboi wrote:
Doomsday on Ice

Rapid collapse of Antarctic glaciers could flood coastal cities by the end of this century.


By Eric Holthaus on Nov 21, 2017

"The only place in the world where you can see ice-cliff instability in action today is at Jakobshavn glacier in Greenland, one of the fastest-collapsing glaciers in the world. DeConto says that to construct their model, they took the collapse rate of Jakobshavn, cut it in half to be extra conservative, then applied it to Thwaites and Pine Island."


Pine Island Glacier is already shifting to a new regime. A huge iceberg just calved off it..... Once the ice calves behind the grounding line the whole glacier will collapse and rapidly retreat just like Jacobhavn Glacier in Greenland....and then collapse will eat its way into the interior of the West Antarctic Sheet, causing ice drawdown from the entire ice sheet.

Image
Recent Pine Island Glacier iceberg calving event

Cheers!
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Re: Sea Level Rise Pt. 2

Unread postby onlooker » Tue 09 Jan 2018, 11:14:55

https://www.yahoo.com/news/ocean-floor- ... 02572.html
The Ocean Floor Is Sinking Under The Water Weight From Melting Glaciers, And It’s As Bad As It Sounds
The Big Economic Plunge is approaching
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Re: Sea Level Rise Pt. 2

Unread postby Tanada » Tue 09 Jan 2018, 11:37:34

onlooker wrote:https://www.yahoo.com/news/ocean-floor-sinking-under-water-130002572.html
The Ocean Floor Is Sinking Under The Water Weight From Melting Glaciers, And It’s As Bad As It Sounds


Everything in balance, the continental crust where the glaciers are receding is rising as well. All that mass makes a big difference no matter if it is on land or in the sea.

The interesting thing to me is, how will this change the rate of sea quakes and tsunami's as the forces balance out in a different direction? There are geological remnants of per-historic tsunamis in many places like Hawaii and the Bahamas and the Canary Islands. You would think with sea level rising nearly 400 feet from 20,000 ybp to 6,000 ybp that most such events would have been triggered. Unfortunately some of them are cyclical like the Southeast Asia Tsunami of Christmas 2006 and the Seattle Tsunami that last happened in 1700 that seems to take place every 290-350 years as the subduction zone slips.
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