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Post by Olgrligm on Mar 23, 2008 23:06:30 GMT
This is only a rough model, scientists have done it more accurately (that's scientists with knowledge, not know-nowt celebrities), but you can actually debunk part of the global warming myth in your kitchen.
Take some kind of tub with measurements on it that can be easily read and pour salt water in. Make some ice out of salt water and then put it in the water you have just poured. Take a measurement of the water level. Then sit back and wait for the ice to melt. When all of the ice is melted, take another measurement of the water level. How does the water level change?
a) It goes up
b) It goes down
c) It stays almost exactly the same
I'll give you a clue - it isn't a or b. Part of the key is that the majority of the ice is underwater and that the ice is less dense than the water itself. Put it like that and its pretty obvious why the results are as they are.
Turns out we're not all going to drown then, as Bob Geldof would claim. Science defeats the know nowts and the Daily Mail.
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Post by salopstick on Mar 23, 2008 23:10:19 GMT
green tax, green tax, green tax
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Post by mumf14 on Mar 23, 2008 23:36:46 GMT
I remember when people thought the world was round... or do I mean flat..? ;D
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Post by Zippy Moon Dust on Mar 24, 2008 0:16:46 GMT
Mumf - do you mean Parkin's chin?
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Post by Zippy Moon Dust on Mar 24, 2008 0:22:44 GMT
MysticalDecent _ I understand and agree but there is a LOT of frozen land water on Greenland and Antarctica ZMD (ex-geologist) Although I think that pirates are to blame.  |
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Post by Dr Oetcake on Mar 26, 2008 9:17:01 GMT
Its happening, mind you, I could cope with Fratton Park becoming a wonderful watery wonderland.....
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Post by jeffers on Mar 26, 2008 9:59:16 GMT
It's common knowledge that sea ice will have no effect on sea level for the reasons you've stated. Water in it's three states doesn't change mass, so if it melts, there will just be the same amount of water as before...
It's the ones out of the water, like the Greenland and Antarctic ice sheet which holds >90% of the worlds freshwater which will cause problems. Something like a 3-4 degree increase in temp will trigger the melting of the whole lot.
Can't say I'm that bothered about it really...We should be long gone by the time that all happens! ;D
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