What would happen to global mean sea levels if all land based pack ice seasonally melted to the bed rock?

Question

Greenland, for example, is experiencing unprecedented moulins and ice quakes. If all of greenland's land based ice either slipped into the ocean hard, bit by bit over decades suring the summer months, and then refroze what remained in winter, and the cycle continued the next year, and the same thing occured in all of the high altitude glaciers, and all across Antarctica, and this spiral continued to the point where in the summer months vegetation could survive and flourish at the magnetic south pole, and the northern most tip of Greenland, ...

If such a hypothetical scenario were to occur, how much higher would average mean sea levels be relative to today???

Answer 1

The overall total sea-level rise if all the ice and snow on the planet were to melt would be 80.32 metres (263 feet).

If Greenland melted completely sea levels woulod rise by 6.55 metres

If all of Antractica melted there would be an additional 73.42 metres of sea level rise(64.90 metres for the East Antarctic ice sheet, 8.06m for the West Antarctic ice sheet and 0.46m for the Antarctic Peninsular)

If all the ice in the snow-fields, mountain glaciers etc around the world were to melt it would add a further 0.45 meters.

If the Arctic ice were to melt it would have no effect on sea levels as this is a floating mass of ice and as such is already displacing it's own mass of water.

However, the huge masses of ice on Greenland and the Antractic are squashing the land beneath, as they melt the land uplifts (glacial rebound) further adding to sea-level rises. This isn't something that can be accurately measured so a range of 10 to 30 metres is applies.

Taking glacial rebound into account you're looking at 90 to 110 metres.

In order for all the ice to melt the planet needs to warm, this will lead to thermal expansion of the seas and oceans. This is the biggest single contributor to current and future sea level rises and accounts for a little over half of all increases. Taking this into account you're looking at a figure upwards of 230 metres (750 feet).

Answer 2

The sea level rise from the melting of Greenland alone would be 6.55 meters (21.5 feet) worldwide. Throw in Antarctica and the total sea level rise would be 80.32 meters, or 263 feet.

http://cegis.usgs.gov/pdf/aag-2007.pdf

Answer 3

This would require an average global temperature increase of about 36 degrees to affect Antarctica! Sea levels would rise about 220 ft.......... this sounds like a great science fiction movie.
http://www.johnstonsarchive.net/environment/waterworld.html

However ------- at one point during the Dino era the oceans were 27 degrees warmer than today.

Answer 4

they have shows on television approximately that. each and every of the shoreland could be under water. manhattan city sparkling over as far as Ohio. California could be not extra. Jacksonville Fl could be the coastline on the Gulf. tens of millions of persons could be without residences as they understand. If an Asteroid hit interior the Alantic Ocean, Say so long. All substantial fault lines come jointly interior the Atlantic ocean which might set off worldwide Earthquakes and Volcano eruptions. Ect. we are all GONNA DIE! :)

Answer 5

I saw this recently on T.V., and their theory was 3 feet.There was a detailed map of the continents, and the east coast was very different, with Florida gone.I am in Coastal N.C. and that is gone too.

Answer 6

Al and Oprah said Florida and Manhatten will be under water if we don't do something very big in just eight or nine years.

LOL - looks like we should just bend over.