Unless of course the atmosphere was getting bigger!
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Sent: Thursday, July 12, 2001 12:38
Subject: Re: only the world (theory)
David Evans wrote
>Carbon Dioxide begins to rise after the start of the Industrial Revolution
>and rises rapidly after the invention of the petrol engine.
What is the nature of the evidence for this? Direct measurements of
the carbon dioxide content of the atmosphere were made at "the start
of the Industrial Revolution". Presumably this increase is inferred from
some indirect means of measurement, such as Arctic ice cores (a
technique that has its critics). What are the actual figures quoted ----
the units presumably are tiny --- parts per million?
Several people have commented on the atmospheric chemistry
involved. Thus, an atom of carbon (from fossil or other fuel) is burned
to produce one molecule of carbon dioxide (released into the atmosphere),
with the simultaneous consumption of a molecule of oxygen, from the
atmosphere. Any increase in carbon dioxide then is accompanied by a
corresponding equi-molar decrease in the oxygen content of the atmosphere.
Have such a decline in the proportion of oxygen been observed?
If it can be shown that the proportion of carbon dioxide in the Earth's
has been increasing but at the expense of ALL other gases --- with the
of nitrogen, oxygen, argon and so on all falling by the same (smaller)
this would suggest that the source of most of the carbon dioxide is NOT
but produced by some natural means as volcanic activity, decomposition of
methane hydrates, etc. If however, it can be shown that there is an
increase in carbon
dioxide and an equivalent fall in the oxygen content of the atmosphere,
proportions of nitrogen, argon, etc remaining constant, this would support
for the influence of human activity.
If the oxygen content of our atmosphere is decreasing this could have far
consequences than some of the other scenarios proposed. Do these analyses
I think we should be told.