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Science Forum Index » Environment Forum » Sunspot Facts From A Geologist
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| 0BZN0 |
 Posted: Wed Apr 30, 2008 1:38 am |
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Dr. Don J. Easterbrook, Professor Emeritus Geology, Western Washington
University, author of 8 books, 150 journal publications with focus on
geomorphology; glacial geology; Pleistocene geochronology; environmental
and engineering geology.
CBS-TV, 60 Minutes, Burlington, Washington
March 30, 2008
http://icecap.us/images/uploads/DonEasterbrookInterviewTranscript.pdf
KLC: What about the claim by Hansen and others that TSI [Total Solar
Irradiance] has been unchanged for 80 years, thus it cannot explain
recent global warming?
DJE: Not true. If you look at the data coming out, you see a strong
correlation between global temperature and irradiance. If you plot
irradiance versus sunspots, you again get the same kind of curve, and
the inference is you can connect these curves to recognize a link
between global temperatures and the sunspot cycle. We only have
satellite measurements back to about 1970, thirty-some years of data,
and the change is about a tenth of one-percent. That's more than the
eight one-thousandths of a percent of CO2 change, so they say the TSI
change is not enough?
The argument I make is that the correlation between sunspot activity and
temperature is not fortuitous-it can't be. There must be a cause and
effect relationship. We don't know what the connection is, but it is
obvious that a small change in solar irradiance produces a big climate
change. It's leveraged by something, maybe by water vapor. We're not
sure. The argument that it's not big enough? A friend of mine has a
saying which I love. "If it happened, then it must be possible." Well,
it happened, so it must be possible.
--
Warmest Regards
Bonzo
"From 1870 to 1900, we had global cooling, then we had significant
global warming from about 1910 to 1945. That global warming is not
accompanied by any significant rise in CO2, so you can't blame CO2. Then
CO2 increased while we had global cooling. You can't blame that on CO2.
It's only been the last 30 years there's been correlation between CO2
and global warming" Dr. Don J. Easterbrook, Professor Emeritus Geology,
Western Washington University |
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| Roedy Green |
| Posted: Wed Apr 30, 2008 1:53 am |
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On Wed, 30 Apr 2008 16:38:07 +1000, "0BZN0" <0BZN0@ddo.com> wrote,
quoted or indirectly quoted someone who said :
Quote:
KLC: What about the claim by Hansen and others that TSI [Total Solar
Irradiance] has been unchanged for 80 years, thus it cannot explain
recent global warming?
But 2000 other scientists, ones with much more relevant credentials
have said solar output is not the cause of the global warming.
What have your read on the opposite view?. Nothing, right. Why is
that?
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com |
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