Satellite measurements are far more
accurate than surface thermometers, and they provide readings over
large areas of the oceans where there are no surface temperature
measurements. They also provide a range of vertical measurements
throughout the atmosphere that are unavailable from ground-based
thermometers.
When you hear “hottest year on
record,” that record of thermometer measurements exists only from about 1890. The earth was
warmer 1,000, 3,000, and 6,000 years ago when there were no factories
or automobiles or thermometers. Indeed, for 95 percent of the last
100 million years the earth was warmer than it is today.
The IPCC fourth assessment report (AR4)
says current atmospheric carbon dioxide (now 391 ppm) “exceeds the
'natural range' over the last 650,000 years (180 to 300 ppm) as
determined by ice cores.” Nonsense! The ice cores show measurements
of over 400 ppm in 1700 A.D. and 200 A.D. Samples from Camp Century
(Greenland) and Byrd Camp (Antartica) range from 250 to nearly 500
ppm over the last 10,000 years. The carbon dioxide level was about
the same 10,000 years ago as today, and temperatures rose as much as
6 degrees Celsius in a decade—100 times faster than in the past
century!
Furthermore, more than 90,000(!) direct (not from ice cores) measurements were made between the years 1812 and 1961 and published in 175 technical papers. These were made by top scientists, including two Nobel Prize winners, using techniques that are standard textbook procedures. They show average carbon dioxide measurements of 440 ppm in 1820 and 1940, and 390ppm in 1855. But these have been ignored because they don't fit the hypothesis of man-made global warming.
Furthermore, more than 90,000(!) direct (not from ice cores) measurements were made between the years 1812 and 1961 and published in 175 technical papers. These were made by top scientists, including two Nobel Prize winners, using techniques that are standard textbook procedures. They show average carbon dioxide measurements of 440 ppm in 1820 and 1940, and 390ppm in 1855. But these have been ignored because they don't fit the hypothesis of man-made global warming.
Water vapor is a strong greenhouse gas,
accounting for at least 95 percent of any greenhouse effect. Since
CO2 is a weak greenhouse gas, computer models predicting significant
CO2 warming depend on it being amplified by increased evaporation of
water. But in all the many documented periods of much higher carbon
dioxide, that never happened. During the Ordovician Period, for
example, the carbon dioxide level was 12 times what it is today, and
the earth was in an Ice Age.
The doctrine that global warming is due
to the greenhouse effect sounds plausible enough to allow it to be a
tool for promoting political and ideological agendas, but it is not
scientifically supportable. The sun sets the level of carbon dioxide
in the earth's atmosphere by the cumulative effect of variations in
the galactic cosmic rays reaching the earth, as modulated by the
solar wind. It has nothing to do with emissions from factories or
automobiles.
And clouds have a hundred times
stronger effect on climate than does carbon dioxide. Even if
atmospheric carbon dioxide doubled—which the alarmists say would be
a disaster—its effect would be canceled out if cloud cover expanded
by 1 percent. Yet in just 3 and one-half years in the 1990s, cloud
cover changed by more than 3 percent. What determines cloud cover?
The sun, through variations in cosmic rays and solar wind. In the
words of Dr. Theodor Landscheidt of Canada's Schoeder Institute:
“When the solar wind is strong and cosmic rays are weak, the global
cloud cover shrinks. It expands when cosmic rays are strong because
the solar wind is weak. This effect [is] attributed to cloud seeding
by ionized secondary particles.”
Now perhaps you can appreciate a
comment by Reid Bryson, founder of the Department of Meteorology (now
Department of Oceanic and Atmospheric Sciences) at the University of
Wisconsin and Director of the Institute for Environmental Studies:
“You can go outside and spit and have the same effect as doubling
carbon dioxide.”