101 lines
4.8 KiB
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101 lines
4.8 KiB
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From fork-admin@xent.com Mon Sep 23 22:47:44 2002
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23 Sep 2002 13:56:31 -0700 (PDT)
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From: "Jim Whitehead" <ejw@cse.ucsc.edu>
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To: "James Rogers" <jamesr@best.com>
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Cc: <fork@example.com>
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Subject: RE: Goodbye Global Warming
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Date: Mon, 23 Sep 2002 13:53:56 -0700
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> "the historical record", by which you mean *human* historical record, is
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> highly overrated (nigh worthless) when you are talking about geological
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> timescales, even on topics with as short a timescale as climate.
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There has been a significant recent increase in global CO2 concentrations.
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The vast preponderance of the new CO2 in the atmosphere is due to human
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activity starting around the industrialization of Europe, and accelerating
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after WWII. Most scientists studying global climate change believe that
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these increased CO2 concentrations are the primary causal agent for
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increased global warming. Hence our interest in items of human time scale.
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> It is worth noting that underneath the receding glaciers deposited
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> during the last major ice age, they are finding substantial evidence of
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> humans living in what was a nice temperate climate before the glaciers
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> paved over their civilization. The receding glaciers have turned into a
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> bit of an archaeological treasure chest, as they expose artifacts buried
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> in and underneath them as they shrink that have been preserved by the
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> ice for thousands of years. I don't see any compelling reason to "save
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> the glaciers" anyway, particularly in light of the fact that their
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> existence has always been transient.
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Most global climate change scientists would agree that temperatures in the
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past have often been much warmer than today. The point of global warming
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isn't to save the Earth -- the planet is not sentient. The point is to
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understand and potentially reduce the impact of increasing temperatures on
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global human activity.
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> For anyone to insist that the current negligible fluctuations are
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> anthropogenic just heaps one ridiculous assertion upon another. I'll
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> just stick with Occam's Razor for now.
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The increase in atmospheric CO2 concentration is due to human activity.
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It is generally accepted that increases in CO2 in a closed environment
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subject to solar heating retain more of that solar energy. This is the
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current best explanation for the high temperature of Venus. If the CO2
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concentration goes up globally (which it has), then theory states the earth
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should be retaining greater solar energy. This process may be slow, and may
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be difficult to monitor due to the variability of temperatures worldwide. I
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encourage you to refute any part of this causal chain linking CO2 to
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eventual increases in global energy content, part of which will be evident
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as heat.
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- Jim
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