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General Chat General chat - common sense in here please. Decent serious discussions to be enjoyed by everyone! |
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10-01-2007, 17:08
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#46
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Resident Waffler
Join Date: Jun 2004
Location: Accrington, Hyndburn
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Re: Accyweb's Help With Lost Item!
This sea currents thing is confusing me now. If the currents are going to stay the same how is the Gulf Stream/Atlantic drift going to change? Just have colder non drifty water on top of it?
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10-01-2007, 17:20
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#47
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Apprentice Geriatric
Join Date: Jan 2004
Location: Darwen, Lancashire
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Re: Accyweb's Help With Lost Item!
As the NAD progresses northwards it meets the cold water of the North Atlantic, cools and becomes more dense than the water it meets. This causes it to sink and underwater currents take it back towards the Mexican Gulf.
If or maybe rather when the North polar ice cap melts it chucks squillions of tons of very cold water into the North Atlantic and it travels southwards and meets the NAD further south than before. Thus the above process happens further south than normal.
The more melt there is from the North polar ice cap the further south the GS sinks.
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10-01-2007, 18:02
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#48
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Foreign Correspondent
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Re: Accyweb's Help With Lost Item!
Quote:
Originally Posted by garinda
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And as you go higher, the density of the air, which helps to capture and reatain heat, rapidly decreases. Also, at sea level, there is a lot of land and water to capture and retain the sun's radiant heat. Not so at high altitudes!
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10-01-2007, 18:09
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#49
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Foreign Correspondent
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Re: Accyweb's Help With Lost Item!
Quote:
Originally Posted by WillowTheWhisp
This sea currents thing is confusing me now. If the currents are going to stay the same how is the Gulf Stream/Atlantic drift going to change? Just have colder non drifty water on top of it?
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Hi Willow,
Two things that drive the Gulf Stream circulation. The first, of course, is the enormous amount of solar energy captured by the tropical areas of the ocean. However, as the stream cools, the salinity of the water causes it to sink in the northern seas, where there is essentially a cold return current. As this cold current runs deep in the ocean, it does not cause a lot of cooling to land masses. The concern is that the fresh water ice melt from the Arctic will interfere with and possibly stop the sinking of the water, messing up the return flow, effectively shutting the Gulf Stream down.
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When in darkness or in doubt, visit Oswaldtwistle!
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10-01-2007, 19:37
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#50
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Resident Waffler
Join Date: Jun 2004
Location: Accrington, Hyndburn
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Re: Accyweb's Help With Lost Item!
OK maybe I'm being a bit dim but why won't the salty water mix with the non salty water and just make a batch of less salty water? (Like when you add more cold water to a pan of boiling salted water.)
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11-01-2007, 11:48
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#51
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Apprentice Geriatric
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Re: Accyweb's Help With Lost Item!
It’s not being dim WillowTheWhisp, just curious and there is nothing wrong in that.
We are talking about squillions and squillions of gallons of water and the fresh will mix with the salty – eventually. It just doesn’t happen in an instant like it does in your saucepan.
Taking the principle to the extreme – put a spoonful of Bovril in a cup and then pour water onto it. The mix will not occur unless you stir it vigorously.
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11-01-2007, 13:27
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#52
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God Member
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Location: at the border ..
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Re: Accyweb's Help With Lost Item!
It hailstoned yesterday when i was taking a 5 minute break round the back of the sports centre!
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11-01-2007, 14:22
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#53
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God Member
Join Date: Aug 2005
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Re: Accyweb's Help With Lost Item!
Quote:
Originally Posted by Billcat
Hi Willow,
Two things that drive the Gulf Stream circulation. The first, of course, is the enormous amount of solar energy captured by the tropical areas of the ocean. However, as the stream cools, the salinity of the water causes it to sink in the northern seas, where there is essentially a cold return current. As this cold current runs deep in the ocean, it does not cause a lot of cooling to land masses. The concern is that the fresh water ice melt from the Arctic will interfere with and possibly stop the sinking of the water, messing up the return flow, effectively shutting the Gulf Stream down.
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Hs it not shut down at least once before thanks to an out spill of fresh water from Canada?
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