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Carbon Dioxide - 381 ppm - 3.0 ppm/y



 
 
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  #71  
Old March 16th 06, 07:31 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y


bill wrote:
Methane in the atmosphere has a 5 year half-life.

Don't listen to the borg, get the facts :

"Methane has an atmospheric lifetime of 12 +/- 3 years and a GWP of 62
over 20 years, 23 over 100 years and 7 over 500 years. The decrease in
GWP associated with longer times is associated with the fact that the
methane is degraded to water and CO2 by chemical reactions in the
atmosphere."

http://cosmic.lifeform.org


Okay, I was wrong by a small amount in my half-life statement, I
read it last year.
However, Your citation is also wrong. the proportion of the
methane which degrades to co2 remains in the atmosphere for milennia,
correct, but the water vapor precipitates out.


Additionally, atmospheric lifetime is wildly different from
half-life.

  #73  
Old March 16th 06, 08:11 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y


"bill" wrote in message
oups.com...
He also assumes that the environment in which we all live could
sustain
such levels. I don't think there is any precedent for that
assumption.

I don't think plants will complain.

How do you know? The planet has never sustained those levels.

800 ppm?

800 ppm will easily desertify the planet and melt all the ice.

increased temperature accelerates the evaporation precipitation
cycle, really, you are looking at more tropical type climates and less
desert.


It isn't that simple. Increased CO2 increases the temperature, which
increases the evaporation rate, which increases precipitation - in areas
where there is precipitation. Deserts (the Sahara, for instance), by
and
large, aren't benefiting from such a scenario, and in fact, are growing
as
we speak.


Granted, however, as the climate regime changes, the weather
patterns will change with them and places which have traditionally not
gotten rain will begin to. in the case of the sahara, the southerly
shifting of the gulfstream will start to drop rain there instead of
europe.


Except that there is no indication that that is occurring. The fact is
that the Sahara and most other deserts (including those in the Southwestern
U.S.) are expanding.

In addition, the melting of the polar caps, and the attendant rise
in sea levels will further increase the global precipitation since
evaporation is a surface phenomenon.


And, as we all know, water is the most potent greenhouse gas, so it will
only exacerbate the warming.

Note: Silver linings sometimes com with pretty freaking huge
thunderstorms. I never said this would be fun, just survivable for
technological society.


Unsubstantiated assumption.

George


  #75  
Old March 16th 06, 08:53 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y

Clifford wrote:


Why live in an apartment when you can own your own home. It's the American
dream!


Sure, with a variable rate mortgage, you can declare bankruptcy!

Besides, only welfare/socialist people live in apartments.


Those darn commies, they are everywhere!

Public transportation is for people that can't afford a car!


Right, befouling the land and air is your God given right!

Why go backwards and sit on a puke smelling bus?


Yes, you don't want to suffocate in stalled rush hour traffic! You can
while away the hours in comfort. Just bring your own oxygen. Hey, guess
what, hydrogen oxygen fuel cells have their own cryogenic oxygen tanks!

Air conditioning. Heat. Don't you just love hydrogen and oxygen?

Count me out of your utopia!


Ok, you're out.

http://cosmic.lifeform.org
  #76  
Old March 16th 06, 09:01 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y

On 16 Mar 2006 08:50:26 -0800, in a place far, far away, "bill"
made the phosphor on my monitor glow in
such a way as to indicate that:

"George" wrote in message


He also assumes that the environment in which we all live could sustain
such levels. I don't think there is any precedent for that assumption.

I don't think plants will complain.

How do you know? The planet has never sustained those levels.

800 ppm?


800 ppm will easily desertify the planet and melt all the ice.


increased temperature accelerates the evaporation precipitation
cycle, really, you are looking at more tropical type climates and less
desert.


Not to mention the fact that it would probably accelerate plant growth
rates (and in fact such acceleration would prevent the levels from
ever getting that high).

But don't confuse Elifritz with reality.
  #78  
Old March 16th 06, 10:54 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y [but 60 000 ppm is the OSHA limit]

On Thu, 16 Mar 2006 18:47:15 GMT, in a place far, far away, "Coby
Beck" made the phosphor on my monitor glow in
such a way as to indicate that:

Ya, we saw a lot of that during the Bush's Katrina Fiasco.

Good point, Scott. "Katrina" was a classic case of mass hysteria.

Actually, it was a classic case of press hysteria. Most of the
reporting turned out to be wrong.

So all those people weren't trapped in the Superdome of Convention Center?
Half of the population isn't still displaced?


All the reports of child rapes and murders in the super dome were false.
All the reports of rampant looting and lawlessness in NOLA were wrong. The
reports of stranded people shooting at rescue helicopters were wrong. All
the general depictions of poor black people as dangerous animals were wrong.


Don't forget the cannibalism.
  #79  
Old March 16th 06, 10:57 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y

On Thu, 16 Mar 2006 18:15:00 GMT, "Clifford" wrote:

Why live in an apartment when you can own your own home. It's the American
dream!


Exacty. Pay rent for 40 years, retire, and... you still have to pay rent. Buy
your own place, and when you get it paid off, you don't have to pay rent any
more.

Besides, only welfare/socialist people live in apartments.


You got that right. Buses suck. Sharing space with strangers sucks. Waiting
on buses sucks. Having to walk blocks because that's as close as the bus gets
to where you want to go sucks. Not having service when you want it (like 1:00
AM after the late movie) sucks. Buses suck.

Public transportation is for people that can't afford a car!


Absolutely.

Why go
backwards and sit on a puke smelling bus?


Yep - most of 'em are fairly clean, but the bozo you have to sit beside may or
may not be.

Count me out of your utopia!


Me too.

Dave Head

Clifford



  #80  
Old March 16th 06, 11:21 PM posted to sci.environment,sci.space.policy,alt.global-warming,sci.geo.geology
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Default Carbon Dioxide - 381 ppm - 3.0 ppm/y

Dave Head wrote:

Dave Head changing his email address and/or
cross posting in science newsgroups sucks.

plonk

http://cosmic.lifeform.org
 




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