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- From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
- Newsgroups: sci.environment
- Subject: Re: Ozone (A few questions I would like answered.)
- Date: 15 Nov 1992 19:15:16 GMT
- Organization: HST Wide Field/Planetary Camera
- Lines: 51
- Distribution: world
- Message-ID: <1e67k4INN953@gap.caltech.edu>
- References: <Bxqy4z.KJu@ucunix.san.uc.edu>
- Reply-To: carl@SOL1.GPS.CALTECH.EDU
- NNTP-Posting-Host: sol1.gps.caltech.edu
-
- In article <Bxqy4z.KJu@ucunix.san.uc.edu>, klasmekj@ucunix.san.uc.edu (Kevin J. Klasmeier) writes:
- >I have been studying ozone for several months now and have come up with
- >some questions I would like answered. If anyone knows about ozone
- >depletion, please respone to klasmekj@ucunix.san.uc.edu
- >
- >1) What is the major source of chlorine into the atmosphere?
- > I have heard that Clorine from the seawater is hands down #1.
-
- I don't know, and the answer to the question as you phrased it is unimportant
- to the matter of the ozone layer. The important question is "What is the major
- source of chlorine in the stratosphere?" You see, the troposphere and the
- stratosphere mix with a time constant on the order of decades, and a great many
- chlorine compounds can be removed from the troposphere by various processes
- before they have a chance to reach the stratosphere. So in order to cause
- problems with the ozone layer, a chemical containing chlorine has to be inert
- in the troposphere and subject to breakdown in the stratosphere. The various
- chlorine compounds from seawater are reactive enough that they don't reach the
- stratosphere in large amounts. CFC's, on the other hand, meet both criteria
- quite nicely.
-
- >2) Is the formation of ozone (in the atmosphere) responsible for the
- >actual absorption of UV light, or is it the breaking apart of ozone from
- >UV light, or is it both (or neither?)?
-
- Photodissociation of O2 (which releases elemental oxygen and allows formation
- of ozone) absorbs in one band of UV. O3 absorbs in a different band. It's
- the band in which O3 aborbs that we're concerned about.
-
- >3) Aprox. what percentage of Chlorine to humans omit into the
- >atmosphere, and aprox. what percentage does nature itself omit into the
- >atmosphere?
-
- Again, the question is irrelevent. The relevent question is how much from
- which source ends up in the troposphere. The evidence indicates that it's
- man-made compounds that account for most of the stratospheric chlorine.
-
- >I am intrested in ozone depletion. I am not sure, however, if there is a
- >problem or not, I have read some pretty powerful evidence on both sides
- >and would like to draw a conclusion based on all known facts.
-
- If the "pretty powerful evidence" against it being a problem is what led you to
- believe that total atmospheric burden of chlorine is a relevent factor, then
- I'd say you've been listening to ill-informed propaganda.
- --------------------------------------------------------------------------------
- Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL
-
- Disclaimer: Hey, I understand VAXen and VMS. That's what I get paid for. My
- understanding of astronomy is purely at the amateur level (or below). So
- unless what I'm saying is directly related to VAX/VMS, don't hold me or my
- organization responsible for it. If it IS related to VAX/VMS, you can try to
- hold me responsible for it, but my organization had nothing to do with it.
-