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  #21  
Old 16.10.2006, 13:35
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Re: An Inconvenient Truth - us ruining our planet

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wtf are you talking about ? This is both and observation of the prevelance of emissions trading and a reference to noise. I have no record of agreeing anything with you, except to comment no further on your unusual postings on another thread. So I will summarise to save time : you have problems with your neighbours. Many of us don't. Think about why. End of my contribution to that subject.

dave
Thanks for your summary.
Thanks for your end of contribution.

I was not trying to revive anything, just happen to observe something.
I am not even interested to talk about that subject anymore, since it became distorted.

HAT
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  #22  
Old 16.10.2006, 22:08
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Re: An Inconvenient Truth - us ruining our planet

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HAT
wtf are you talking about ?
dave
Ummm. Small point of etiquette here. Don't quote someone, then erase the entire content of their quote and then ask "wtf are you talking about". Sorry - that's just poor form, and it's not fair - despite whatever issues HAT may have with his neighbours or any sniping you've done at each other on other threads. People aren't going to scroll up 5 meters of screen to try and figure out what you deleted in the quote. But I do appreciate you mentioning some on-topic points in your post.
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  #23  
Old 16.10.2006, 23:43
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Re: An Inconvenient Truth - us ruining our planet

Did anyone see the interesting documentary about the Atlantic Conveyor slowing down? This is the flow of warm water up from the warmer southern seas that eventually cools near Greenland and returns back to the south. This conveyor is responsible for keeping the climate of England much warmer than countries on the same parallel.

Apparently scientists have studied this and discovered that the conveyor has stopped many times and each time an ice age has gripped northern Europe. They also predict that the conveyor will stop again within the next few decades and we will once again see Ice Bergs in the North Sea.

I believe that they also mentioned in the same program that the carbon emissions from humans are insignificant when compared with the emissions caused by naturally occurring things such as volcanos.

Now I don't subscribe to the shock and awe tactics that are currently in play. I also don't believe that we are doing ourselves or our planet any good by burning up our natural resources at the rate that we do. But, having said that, I think that there are too many variables at play to be able to simply say that we are killing our planet.
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Old 17.10.2006, 09:07
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Re: An Inconvenient Truth - us ruining our planet

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Did anyone see the interesting documentary about the Atlantic Conveyor slowing down?
The Day After Tomorrow was an excellent documentary i thought - i bought the one with the hologram on the front

The conveyor thing is interesting, but it strikes me that despite the bulk of the extra fresh water flowing into the Atlantic at first (ie weakening the current), wouldn't it get mixed up into the other oceans within a year or two?
I mean, aren't the salt concentrations roughly the same in all of the connected major oceans, or have they already noticed a change in salinity in the Atlantic?

Once it's had time to distribute, i would be surprised to hear that the extra fresh water had that much of an impact on global salinity...?

I am as always, talking completely without anything to back up my claims/beliefs!
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Old 17.10.2006, 09:18
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Re: An Inconvenient Truth - us ruining our planet

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I mean, aren't the salt concentrations roughly the same in all of the connected major oceans, or have they already noticed a change in salinity in the Atlantic?
Not really - salinity does vary quite a bit in different areas. It doesn't always mix. For example there are places where layers of fresh and saltwater lie on top of each other (due to their different densities) or fresh water currents run through salt water. If you are a diver you may have observed some of this first hand. Eventually, if there is movement of the water the salt and fresh will mix, but if the body of water is big enough (like an ocean) then there won't be enough mixing to balance the salinity levels across the whole planet. Remember also that in the case of a current the different temperature and salinity of the water in the current will cause it to travel above or below the water which it travels through helping to keep it "separate" and therefore reduce the amount of mixing that might occur. Imagine it like a big pipe with some mixing going on at the edges, but the bulk of the water remaining untouched.
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Old 17.10.2006, 09:25
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Re: An Inconvenient Truth - us ruining our planet

I spent four months in the Arctic measuring this as part of an Oceangraphic survey. The Conductivity,salinity, temparature and depth profiles have interesting acoustic properties

dave


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Remember also that in the case of a current the different temperature and salinity of the water in the current will cause it to travel above or below the water which it travels through helping to keep it "separate" and therefore reduce the amount of mixing that might occur.
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  #27  
Old 17.10.2006, 22:49
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Re: An Inconvenient Truth - us ruining our planet

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But, having said that, I think that there are too many variables at play to be able to simply say that we are killing our planet.
We're unlikely to behave so badly that we literally "kill the planet". I understand there have been several so-called "mass extinctions", during which a large percentage of families of creatures suddenly (in geological terms) disappeared from the fossil record. And life continued regardless.

There's even evidence that the world has been completely covered in ice once or twice.

Arguably humans are causing the next mass extinction. And we still might even if we don't push the climate into some nasty (for us), high-energy meta-stable phase.

Humans are not significant in the grand scheme of things. Yet most of the discussion around the damage we're doing seems to be conducted in the context of "if Homo Sapiens Sapiens goes bye-bye then the End Of The World will be nigh". Far from it. Gaia fans would say that rubbing out our species or destroying our civilisation would be an act of self-defence.

The cockroaches one day may rule again .
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