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Global Dimming
Joel M. Kauffman
Lew
Rockwell.com
Friday September 7, 2007
Yesterday
evening (4 Sep 07) PBS ran a Nova on "Global Dimming."
The thesis was that human-generated dust in the air has compensated
for human-generated CO2 and held down the temperature rise, along
with weaker solar output. This is nothing new, since the explanation
for the 1940–1970 global cooling was a type of air pollution
called sulfate aerosols.
The
announcer spoke a climate shibboleth that the vast majority of
climate scientists believed the human-generated "greenhouse
gasses" caused global warming. The truth about this is the
opposite; most scientists do not (Singer SF, Avery DT, Unstoppable
Global Warming Every 1,500 Years, Lanham, MD: Roman and
Little field, 2006, p. 134). The most active of the "greenhouse
gasses" was never mentioned by name; it is, of course, water
vapor (Joel M. Kauffman, Water in the Atmosphere, J. Chemical
Education, 2004, B81(8), 1229–1230). CO2 can hardly
have been the cause of warming
because its level in air has been higher than it is now at least
3 times between 1812 and 1962 as shown by 90,000 direct chemical
measurements (Beck, E.-G., 180 Years of Atmospheric CO2 Gas Analysis
by Chemical Methods, Energy & Environment, 2007, 18(2),
259–282). Further, there is no recent correlation between
CO2 levels and atmospheric temps as you may see easily from a
NOAA
graph.
(Article continues below)
The "star
witness" was Dr. James Hansen of NASA who said that global
warming has been about 0.8 deg C in the last century, most in
the last 30 years. The only parts of the globe with most warming
in the last 30 years are big cities. For example, the least populated
counties of CA gained 0.2 deg C from 1910 to 2000, while the most
populated counties gained 2.3 deg C (Goodridge, J. D., Comments
on Regional Simulation of Greenhouse Warming Including Natural
Variability. Bulletin of the American Meteorological Society,
1996, 77(July), 3–4), as did New York City. With an allowance
for such urban heat island effects, the global temp. rise from
1905–1940 was similar to the one from 1970–2003 (www.giss.nasa.gov).
Dr. Hansen’s flawed USA ground station temps from 2000–2006
needed a Y2K correction provided by the Canadian Steve McIntyre
showing that 1934 was the warmest year of the last 100, not 1998
or 2006; see
for yourself.
Objective reporting would have meant showing how Dr. Hansen’s
runaway climate warnings since 1987 have been overdone by using
a rebuttal witness.
A David Travis
did a clever experiment on the contribution of jet contrails to
warming. He compared the days before 9/11 and 4 days after with
the 3 days when all aircraft were grounded. He found that the
day/night temp. difference was 1 deg C more when jets were absent.
The culprit was said to be dust in the jet exhaust that caused
water droplets to form. First, the effect of humidity on day/night
temp. difference was understood at least 100 years ago. In the
narration this difference somehow became equated to an overall
warming. Next, jet exhaust is equal in numbers of molecules of
water and CO2. At stratospheric temps. water vapor would form
white ice trails pretty fast.
A Prof. Ramanathan
said that anything done to create energy causes atmospheric pollution.
What a shock for proponents of hydro, wind, solar and nuclear
power! His claim was that the particulate pollution over the northern
Malidive Islands from India was absorbing 10% of solar energy.
He failed to rule out water droplets in the wispy clouds shown
in a satellite photo.
Repetitive
photos of industrial plants of unknown type were shown to demonstrate
dust pollution, a common ploy. But some or all of the plants were
emitting steam, not smoke.
The sun’s
output was claimed to have dimmed in the last 20 years, but others
note that the opposite is true (Prof. Lance Endersbee, Climate
Change is Nothing New! New
Concepts in Global Tectonics,
no. 42, Mar 07, Singer & Avery, above, p190–1).
PBS can atone
most effectively by airing the 1-hour BBC4 program: The
Great Global Warming Swindle from March, 07.
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INFOWARS:
BECAUSE THERE'S A WAR ON FOR YOUR MIND
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