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GSBN:Re: Research to combat solar warming
- To: GSBN GSBN@...
- Subject: GSBN:Re: Research to combat solar warming
- From: Derek Roff derek@...
- Date: Sun, 26 Nov 2006 20:22:02 -0700
- Reply-to: "GSBN" GSBN@...
- Sender: "GSBN" GSBN@...
Hi, Straw Wolf John,
The question of human influence on current climate change is one of
the critical ones for our time. It is important to research past
variations, and to determine what other factors might influence
current trends. Unfortunately, some writers have used a deluge of
antedeluvian data to distract from conclusive research on our current
situation. While we are far from knowing everything, many important
questions have been answered, to the satisfaction of an overwhelming
majority of climate scientists. It is wrong to pretend that we don't
have good data, showing that human activity is a major factor in
causing atmospheric changes, which are unprecedented in the last half
a million years.
Drilling into the ice of Greenland, Antarctica, and other locations,
scientists have been able to make a good determination of the
atmospheric temperature, and the levels of various gasses and
pollutants deep into the past. There is a close correlation between
higher carbon dioxide (CO2) levels and higher temperatures. Let me
quote from Al Gore's book, "An Inconvenient Truth," which I happen to
have beside me, and a web site or two (for example,
<<a target="_blank" href="http://www.pbs.org/wgbh/nova/warnings/stories/nojs.html">http://www.pbs.org/wgbh/nova/warnings/stories/nojs.html</a>>). At no
point, over the last 650,000 years (some say "several million
years"), has the atmospheric CO2 exceeded 300 parts per million
(ppm). During most of that period, CO2 was under 240 ppm. The
gigantic volcanic explosions of Toba and Krakatoa, mentioned by
Plimer, did not push the CO2 index over 290.
Today, our atmosphere contains more than 380 parts per million CO2.
And it will take major changes in human activity trends to keep it
from attaining 600 ppm within the next 45 years.
20 of the 21 hottest years ever recorded have occurred in the last 25
years (the 21st was in the 1940s). The last six years have been
warmer than any on record, except for 1997. Whatever graph or
grouping one makes, the current increase in global air and water
temperature averages exceed in magnitude, consistency and duration
anything measured or calculated in the past 650,000 years.
Certainly, there have been major and minor extinctions, and die-offs
of many species in the past, as Plimer asserts. That doesn't make me
eager to experience the next one, and I hate that fact that I am
contributing. I am striving to minimize my contribution, and to
influence others to do the same. This is my strongest motivation for
being involved in sustainable building. I'm proud to be associated
with the Straw Wolf, David Eisenberg, and all the other people on
this list, who are contributing to finding parts of the solution to
slowing CO2 increases, and resulting climate change.
--On November 26, 2006 11:37:24 AM +1100 John Glassford
G ' day DE, Derek at al
Thanks for the responses and I am learning every day. I feel that
Professor Ian Plimer has been taken out of context in the article he
wrote for The Australian. Having met him I feel that I should try
put what he said into some form of context.
Ian feels that here are 27 reasons why the planet is heating up.
Human beings are just one of these reasons. He talks about the past
and warns us that a volcano or meteor will sort us humans out in the
end, not ourselves.
His talk was very interesting and he made some statements of which I
think I got right, amongst them were that:
251 million years ago 96% of life was made extinct by one volcano
217 million years ago another mass extinction of life.
100 million years ago the South pole was tropical
65 million years ago a meteor or asteroid hit the Gulf of Mexico 80%
extinction of life including the dinosaurs.
5 million years ago the earth started to wobble.
125,000 years ago the sea level was 7 metres higher than it is now.
74,000 years ago Toba volcano spewed 100,000 cubic kilo metres of
into the atmosphere? (I can not read my writing here).
18,000 years ago we had the ice ages with Detroit under 2,000
metres of ice.
sea levels rose 130 metres in 13,000 years much faster than today.
10,000 years ago things got very warm.
6,000 years ago sea levels were 2 metres higher than today.
535 AD Krakatoa exploded along with another one in 536 AD which
created the Dark Ages due to 100 cubic kilo metres of sulphur etc
spewed into the atmosphere.
1883 Tamboa and Krakatoa erupted
The plates moving North etc creates the pressure which leads to
eruptions and heaps of gas. The two volcanoes above released more
greenhouse gases that the whole of mankind has done in 100 years of
industrialisation. One or two volcanoes.
He concluded by stating that the planet is also warmed by the sun
which has come closer to the earth and it is these changes which
control the earth not mankind.
Also in question time he said that Mount St Helens spewed 1 cu
kilometre of ash c.f. with Krakatoa in AD 535 with 100 cu kilo
That is what he said as far as I can recall from my notes. I hope I
got him right.
So I am not still convinced by his arguments that the current global
warming is not of our doing. What I think he is saying is that our
efforts to warm the planet pale into insignificance when compared to
mother nature. I do not think he is saying that we are not
responsible for the current "minor" in his opinion global warming
by man and nature. Look at the fires around Sydney at the moment
started by lightning and still burning creating lots of smoke and
pollutants into the atmosphere.
Anyhow food for thought and discussion but unfortunately the right
wing politicians around here like theories such as those put forward
by the Plimers of this world.
For mine I will keep promoting straw bale responsible building to
clients and anyone who wants to listen and that we humans are very
much responsible for this planet's condition at this present time in
Kind regards The Straw Wolf moving into our straw bale den at long
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