On Mar 6, 7:37 am, (Doug Miller) wrote:
In article .com, wrote:
We know that the sun is not cooling, and may even be heating
up slightly slightly contributing to the rise.

Oddly enough, in a different thread, you wrote:

"... solar irradiance has been decreasing:http://www.sec.noaa.gov/SolarCycle/h.../SolarConstant
"


Not odd at all. Context is everything.

There is an eleven year solar cycle. We are near a
minimum so that solar irradiance has been decreasing
for the last five years--the same period over which global
warming has been observed on Mars. Other studies
have shown that the last minimum, in the early 1990s,
was at most very slightly higher than the previous.

Solar variation over times less than ten years are dominated
by the eleven year cycle. A determination of longer-term
trends requires observations over several cycles. We are
nearing the third minimum since such measurements have
been possible by satellite.

Ground-based observations are confounded by global
dimming, something that might explain Dr Abdussamatov's
statement that the sun has been dimming since the early
1990s. During that time,contrary to how he has been quoted,
solar irradiance dropped a bit, then rose again to the peak
in 2000-2001 and has since dropped as part of the 11-year
cycle. It is also possible that Dr Abdussamatov has already
concluded that the current minimum is lower than the previous
one, most others in the field appear to be waiting a bit
longer to be sure the current minimum is past. He also
has made predictions for the next couple of decades which
implies that he is working from a theoretical model.

Solar maxima are poorly defined and noisier than
solar minima so the period is defined as the time
between successive minima, not successive maxima,
and attempts to determine long term trends con-
centrate on the the differences between minima,
not maxima.

There are people who claim that the global warming observed
on Mars over the last 5 terrestrial years (about three Martian
years or 35 dog years) shows that global warming on both
the Earth and Mars is due to an increase in solar irradiance.
Those people ignore the actual solar measurements over
the same period of time and instead conclude that the
solar irradiance has increased from the observed warming,
putting the cart before the horse and ignoring the other
data.

The spectroscopy of atmospheric gases is well understood.
Conservation of energy is well established. The Greenhouse
effect is clearly established. There is no question that current
trends in atmospheric composition are forcing the equilibrium
temperature upwards. To deny that is to deny basic Physics.

The Greenhouse effect is NOT the only mechanism that
determines temperature. The others need to be studied
as well.


Reference:http://groups.google.com/group/rec.w...ec1074423ef4a0


Thanks.

Do you understand now?

--

FF