displacement of water proportionate to the tonnage must have some effect I would have thought.
2006-08-03 02:41:36 · 11 answers · asked by Anonymous in Environment
I hadn't thought of that - there are literally billions of tons of water that man has displaced. But I'm not a scientist, and shouldn't we assume that the scientists HAVE thought of that?!
2006-08-03 02:51:21 · answer #1 · answered by nige_but_dim 4 · 0⤊ 0⤋
We can do some mathematics here. The total estimated world shipping tonnage is 500 million tonnes. That means ships displace half a cubic kilometre of water. Now, the total surface area of the oceans is 361.1 million square km, and that half a cubic km must be spread across that. That works out at a rise of 1.385x10E-5 km, or just over a thousandth of a millimetre!
Not likely to contribute much to coastal flooding therefore!
2006-08-03 05:35:29 · answer #2 · answered by Paul FB 3 · 0⤊ 0⤋
In case anybody has Al Gore's little slideshow of Florida flooding locked into their brains, nobody has ever shown a sea level rise greater than 2-3mm per year. And nobody expects that rate to change for an extremely long time.
But yeah, like everybody else said, the displacement of boats is negligible when you're talking about every oceanic surface in the world.
2006-08-03 04:00:43 · answer #3 · answered by Anonymous · 0⤊ 0⤋
You'll need to start thinking a lot more or thinking a lot less, it's not working too well at the moment. Their displacement is neutral because it's compensated for by all the seagulls that fly out of the sea when a boat passes.
2006-08-03 03:59:16 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If you take the total tonnage floating at any one moment and convert that weight to cubic feet of water then divide by the approximate surface area of the seven seas, etc. the rise in sea level is apt to be perhaps the thickness (thinness?) of paint. Interesting question though.
2006-08-03 03:10:16 · answer #5 · answered by Kes 7 · 0⤊ 0⤋
I think in comparison with the effect of global warming, the increase in sea levels caused by boats is fairly insignificant.
2006-08-03 02:46:34 · answer #6 · answered by starvic7 2 · 0⤊ 0⤋
If you add that to land displacement. Displacement by all sea creatures (Whales, sharks etc). I think I'd be safe in using the sizes of a flea and the moon to demonstrate the differences.
2006-08-03 02:46:23 · answer #7 · answered by JeffE 6 · 0⤊ 0⤋
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2016-10-01 10:27:21 · answer #8 · answered by ? 4 · 0⤊ 0⤋
Negligible on a worldwide scale when you consider how huge and deep the oceans are.
2006-08-03 02:45:30 · answer #9 · answered by grpr1964 4 · 0⤊ 0⤋
they will rise with the sea level.
2006-08-04 00:30:03 · answer #10 · answered by Anonymous · 0⤊ 0⤋