Re: [asa] vapor canopy

BINGO!

And warmer air can contain higher amounts of water vapor so there is
somewhat of a positive feedback loop. On the other hand, that means more
clouds can form which can reflect more sunlight which can cool the
environment. That's a negative feedback loop. The physics is pretty simple
but figuring out the delicate balances and feedback loops is the trick. The
idea that high water vapor concentration could mean long human lifetimes
depends on a lot assumptions that don't hold water. Like the assumption that
aging is solely due to cosmic ray effects and solar ultraviolet damage. Like
atmospheric water vapor concentrations could have been high enough to block
it all without other negative impacts. Besides, atmospheric conditions in
the past can be determined reasonably well and such radical changes haven't
been found.

Randy

----- Original Message -----
From: "Bill Hamilton" <williamehamiltonjr@yahoo.com>
To: "Ted Davis" <TDavis@messiah.edu>; <asa@lists.calvin.edu>
Sent: Thursday, February 15, 2007 12:21 PM
Subject: Re: [asa] vapor canopy

> This brings to mind an issue I have heard about, but on't know the
> reasoning
> involved. From time to time I've read that the earth would have be3en much
> too
> hot to sustain human life under a vapor canopy. Is this because water
> vapor is
> a greenhouse gas?
>
> --- Ted Davis <TDavis@messiah.edu> wrote:
>
>> Relative to the vapor canopy, I would not advise any intepreters to get
>> into
>> that. I have for years been in touch with someone who is doing very
>> careful
>> research on the history of that idea. I have urged him to publish his
>> findings in PSCF, but so far he has not published any of it anywhere.
>> Suffice it to say, the idea has a very checkered pedigree.....
>>
>> Ted
>>
>>
>> To unsubscribe, send a message to majordomo@calvin.edu with
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>>
>
>
> Bill Hamilton
> William E. Hamilton, Jr., Ph.D.
> 248.652.4148 (home) 248.821.8156 (mobile)
> "...If God is for us, who is against us?" Rom 8:31
>
>
>
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Received on Thu Feb 15 20:20:51 2007