So 1358.73 / .8 = 1698.41 ft. So all of Greenland's ice is this thick?
An average, yes !
On antartica it is even several miles thick. During the last ice age the ice sheet on top of New York was an mile high.
1698 feet is less then 1/3rd of a mile, not a biggy in glacier terms.
And yeah, I'm not figuring in the added area from the slope of the shorelines, the required ice would be much more.
No, it wouldn't. These planes are not that large compared to the total surface area of todays oceans. Alot of shoreline is pretty vertical when looking at 20 feet or less sea level rise.
Plus this is figuring ice at a standard volume, not factoring in expansion when water freezes which would also increase the amount of ice required in Greenland to raise the ocean 20 feet.
This expansion ratio of ice is less then 10% and that is why a iceberg is only showing 10% of its mass above the surface. 10% on 1608 feet is only 160 feet which is peanuts when it comes to permanent icesheet. Again the icesheets on antartical can be several miles thick.
This also does not take into account that as the depth is increased around the surface of a sphere more volume is required to add depth because the bigger the sphere the more area
Radius of the earth is roughly 6300 km, 20 feet = 6 mtr and so the increase in surface area due to the spherical nature of the eath when sea level rises 20 feet is :
0.000000000000000086384 % (= 8.6384e-17 % for scientifically schooled people)
I would call this effect totally negligiable.
Maybe my math is incorrect again, prove me wrong. Educate me. Tell me I'm just another dumb redneck, enjoy!
Here you are.
Wouter
