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Ok was getting into a simple #Gedankenexperiment. since I first heard about global warming in 1993, I have been struggling with one thing.... the differential volume of a sphere (or oblate spheroid in this case.)

using 6378 km for earths radius (NASA's Goddard Space Flight Center)

So Surface area of oceans, conservatively is:

4*pi*r^2 = 4*3.1415*6378*6378 = 511,170,000 (keeping only 4 sig figs)

The projected sea level rise by 2100 per https://www.climate.gov/news-features/understanding-climate/climate-change-global-sea-level

"on a pathway with high greenhouse gas emissions and rapid ice sheet collapse, models project that average sea level rise for the contiguous United States could be 2.2 meters (7.2 feet) by 2100 and 3.9 meters (13 feet) by 2150.2"

Now about 71% of earth is water, but for this calculation lets conservatively estimate that the connected oceans are only 65% of the surface:

The volume of ice needed to do this would be:

65(4/3*pi*r_final^3 - 4/3*pi*r_intial^3 )=0.65*(1.087874E12 - 1,086749E12) = 731,200,000 km^3

Now it is estimated that there are about 26,500,000 km^3 of ice in antarctica (if it all melts) and that is the largest deposit in the world. Greenland is also large but less than that, and all the other ice (i.e. Arctic, mountains, etc...) might be 7,000,000 km^3

So conservatively estimating that there is no more than 60,000,000 km^3 of ice in the world (most likely closer to 45-50 million cubic kilometers)

How can see levels rise 2.2 meters? you are a good solid 680,000,000 km^3 short (yes 680 million cubic kilometers short)

What am I missing. These are smart scientists I can't believe a small down #chicagoan​ would out think the best scientists in the world