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- Newsgroups: talk.environment
- Path: sparky!uunet!stanford.edu!CSD-NewsHost.Stanford.EDU!CSD-NewsHost!jmc
- From: jmc@SAIL.Stanford.EDU (John McCarthy)
- Subject: Re: what drives global warming?
- In-Reply-To: balzebub@vesta.unm.edu's message of Fri, 31 Jul 92 01:14:07 GMT
- Message-ID: <JMC.92Jul30212738@SAIL.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Reply-To: jmc@cs.Stanford.EDU
- Organization: Computer Science Department, Stanford University
- References: <f_qm-8_@lynx.unm.edu>
- Date: 30 Jul 92 21:27:38
- Lines: 35
-
- In article <f_qm-8_@lynx.unm.edu> balzebub@vesta.unm.edu (Mike Decker) writes:
-
- Is global warming self-perpetuating? I understand global warming
- to be caused by an increase in the gases in the atmosphere. Does
- anyone know what gases make up the atmosphere? Several things
- put gas into the atmosphere all the time: factories and cars are
- two big contributors.
-
- I also remember a James Burke show in which he talked about the effect
- that higher temperatures have on phytoplankton...
- higher temperatures --> more phytoplankton.
- more phytoplankton --> more oxygen being produced
- more oxygen being produced --> higher temperatures...
- It's cyclic until temps are too hot for the phytoplankton to
- survive, then they die off, gases lessen, and the earth becomes cooler.
-
- But isn't oxygen a relatively small portion of the gas in the air?
- I don't understand how phytoplankton can effect global warming so much,
- unless something else happens when the temp. rises, as higher evaporation.
-
- Anyone care to comment?
-
- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
- Michael Decker
-
- Either you or James Burke is mistaken. Oxygen is 20 percent of the
- atmosphere, and is not going to be much changed by the photoplankton,
- because to produce oxygen they must take in CO2, and CO2 is only
- .03 percent of the atmosphere. I can't make sense of the causal
- chain you put up even with changes.
- --
- John McCarthy, Computer Science Department, Stanford, CA 94305
- *
- He who refuses to do arithmetic is doomed to talk nonsense.
-
-