Han wrote in :

Doug Miller wrote in
:

Han wrote in news:XnsA0847BD6DC6C5ikkezelf@
207.246.207.124:

One of the scary reasons to pay attention to ocean warming is
that much is really cold (like in the 30's and low 40's in
Fahrenheit). If all that ocean water warms just a few degrees, it
will expand, and thus the level will go up. Somebody ought to have
the calculated data how much up that up is.

Not scary at all to anyone who's had an education in the physical
sciences.

Water has its maximum density of 1.00000 g/ml at 3.98 degrees C. At 5
deg C (41 deg F) its density is 0.99999 g/ml, and at 10 deg C (50 deg
F) the density is 0.99973 g/ml -- IOW, warming from 4 deg C to 10 deg
C, water will expand by a factor of (1.00000 / 0.99973) = 1.00027, or
about one-fortieth of one per cent.

Water is actually more dense at 5 deg C than at 0.

[Source for the above data is the Handbook of Chemistry and Physics]

My Handbook is upstairs. One of the very few books I took when I
retired. It is really old, though still the larger format.

OK, let's do the calculations.

First let's assume that the ocean basins don't change in volume as the
ocean warms up.

From http://ngdc.noaa.gov/mgg/global/etopo1_ocean_volumes.html
total volume: 1,335,000,000 km^3
Total surface area 361,900,000 km^2

Average depth thus about 4000 meters.

Using your expansion factor as a very large approximation:
Total volume becomes 1,335,000,000 * 1.00027 = 1,335,360,450

Hold it right there. You're assuming that the entire volume of water on the planet will
increase in temperature, and hence volume, by the same amount.

That ain't gonna happen.

Only a very small portion of it near the surface is going to warm up at all. The depths will
remain quite cold.


or
360,450 km^3 more, which is divided over an area of 361,900,000 km^2.
That is a height of 0.000995993368 km, i.e. 99.59 cm or over 3 feet.

Again, assuming that it *all* warms up. Which won't happen.