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- Path: sparky!uunet!wupost!darwin.sura.net!mips!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!aquifer.geology.uiuc.edu!norris
- From: norris@aquifer.geology.uiuc.edu (Chuck Norris)
- Subject: green house versus global warming
- Message-ID: <norris.712533096@aquifer.geology.uiuc.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: University of Illinois at Urbana
- Date: Thu, 30 Jul 1992 21:51:36 GMT
- Keywords: greenhouse global warming CO2
- Lines: 82
-
-
- A couple of stray thoughts or observations have occurred during the exchanges
- recently about global warming vs green house effects vs science vs politics.
-
- I have found it one of the most interesting and enlightening threads to grace
- s.g.m. in months. Since most of us ultimately feed at the public trough,
- it's important to not only do good science but to understand there is
- an entirely separate 'review' process that operates, and it measures
- our results not just against science and logic but against (social,
- political, economic) acceptability of the implication of those results.
- I happen to think social responsibility accompanies societal funding,
- and it is untenable to take an approach that says "Ah ha! I can prove,
- Johnny, that I knew ten minutes ago that that burner would be hot enough
- to burn you hand. But since I didn't know whether it would be 2nd or
- 3rd degree burns, I wasn't justified in projecting the results by warning
- you."
-
- Thanks, Nick. You've offered a nice view of what we can expect. And thanks,
- Michael, for hanging tough!
-
- In the for what its worth department, I'm with Tobis on the ENSO observation.
- For one thing, it obscures the fact that the same phenomenon was identified and
- named by two strongly divergent elements of society, and scientists stumbled
- onto later. Common experience and social awareness is a valid form of
- observation, just less comfortable to many of us.
-
-
- Enough philosophy. Green house vs global (climatic) warming:
-
- A couple of documentable observations:
-
- Diurnal temperature range at Champaign IL has steadily decreased over the 100+
- years of weather records.
-
- Annual precipitation has increased steadily over the same period from just
- over 33.5 inches (1889-98) to 42.3 (1979-88).
-
- (Premise: Diurnal temperature range is a surrogate for moisture content,
- as may be precipitation.)
-
- Daily mean temperatures climbed very steeply to ~1950, dropped at about the
- same rate for 25 years (hence not as far), and since have climbed at an even
- steeper rate.
-
- When viewed in temperature/humidity space, the weather at Champaign IL is not
- oscillating about a central position, but is clearly in transit between
- two states. The 'from' state we can presumably (partially) document with
- history, the 'to' state ...?
- Is there any reason (beyond its being easily conceptualized) that the impact
- of the (irrefutable) green house effect need be felt solely or primarily as
- temperature increase? In attempting to 'find' the impact in temperature
- values are we overlooking alternative signals?
-
-
- On a related note, someone posted the observation that for now, in the
- tropics, increased cloud cover seems to provide offsetting albedo to keep
- temperatures relatively unchanged. Then speculated that if that doesn't
- remain the case, we could be in real trouble.
-
- If the sulfur in coal and petroleum represents a balance of the atmospheric
- gases at the time the organisms were buried, and if we are merrily returning
- the carbon to the atmosphere while diligently removing the sulfur (to protect
- the environment), are we not venturing into uncharted waters? Even if the
- increased H2O results in increased clouds, aren't we talking about duller
- clouds, and therefore higher temperature? Seems to me if we want to return to
- Cretaceous or Pennsylvanian aged CO2 levels we'd better do our best to make
- sure we're creating the total corresponding atmosphere. At least we know it
- sustained a (probably) livable environment.
-
- [Let's not EVEN consider going back to Cambrian conditions, Nick. There may
- have been abundant and diverse life (but not I think vertebrates), but there
- was damn little if any terrestrial life, animal or vegetable. It apparently
- was NOT a hospitable environment on land!]
-
-
- Thanks for any feedback (grin) and comments are appreciated.
-
-
- Chuck Norris
- University of Illinois
- Department of Geology
- Urbana, Illinois 61801 norris@aquifer.geology.uiuc.edu
-