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Temperature differential from equatorial region to polar

 
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Steve



Joined: 31 Oct 2004
Posts: 14
Location: Plymouth

PostPosted: Fri Dec 02, 2005 10:55 am    Post subject: Temperature differential from equatorial region to polar Reply with quote

Temperature differential from equatorial region to polar region



This difference causes the oceans to have a circulation. Water moves from Equatorial to polar region on the surface and water moves from the

polar to the equatorial region as deep water flow.

1.The equatorial region receives vast amounts of solar radiation which heats the ocean up.
When heated it

becomes less dense and rises to surface.
As it rises to surface deep water is lifting.

2.The polar region is much colder due to recieving less solar radiation and

the ocean is cold.
When water cools it becomes more dense and sinks.
As it sinks, surface water is pulled in behind it.

Both the above cause a continuous

'conveyor belt' circulation.
One major physical occurance that gives this conveyoy belt circulation a big thrust is:
At the polar region, the sea water freezes. Ice

is fresh water, meaning the remaining water is more saline. This increased salinity means even more density and this adds energy to the sinking downthrust at the

poles...... driving the circulation as a powerful density driven current.

Problems in future may be that with less ice forming, it has less energy sinking at the

poles.... eventually diminishing or even shutting the circulation down. This in turn wiould prevent the warm surface water traveling from the equatorial regions towards

the poles (passing temperate climate areas such as UK).
So it is possible that global warming could make temperate regions much colder.

The global picture, is

indeed effected by global changes and one part will effect another, which will effect another etc.

.
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