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Re: Human vs. natural influences on the environment



af329@james.freenet.hamilton.on.ca (Scott Nudds) wrote for all to see:

>jwas@ix.netcom.com(jw) wrote:
>: it just *might* turn out that climate is just approaching a
>: situation where positive feedback was present - for a while;
>
>  Warmer oceans can hold less CO2.

Warmer oceans release more water, forming cloud cover, blockin some
light, and incidently trapping some IR.

>  Melted tundra rots and moves more CO2 into the atmosphere.

Why would it rot?  Higher CO2 stimulates plant growth.

>  More forest fires, more CO2 released into the atmoshpere.

Warmer oceans mean more water evaporated into the atmosphere,
resulting in more rain.  

>  Higher temperatures, higher demand for air conditioning, more energy
>  used, more fossil fuels consumed.

Very true.
>
>  It would appear that there are a host of positive feedback mechanisms,
>many of which are certain.

It would appear that there are a host of feedback mecanisms, many of
which you failed to mention.  Is that because you did not know about
them?

[edited]

Regards, Harold
-----
"If a man will begin with certainties, he shall end in doubts, but if he 
will be content to begin with doubts, he shall end in certainties."
	---Francis Bacon, The Advancement of Learning, ch. 5 (1605).


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