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Old April 4th 09, 01:44 PM posted to alt.global-warming,sci.environment,sci.geo.meteorology,alt.energy.renewable
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Default A Simple Example Debunks Positive Feedback In CO2 Warming

I just checked - they all died last summer.
Heatstroke.

oonbz wrote:



April 1 2009



ACCORDING to the IPCC any direct temperature rise from increasing carbon
dioxide levels is greatly amplified by positive feedback from water
vapour. As the theory goes, rising carbon dioxide levels from human
activity causes some temperature rise which causes more water to
evaporate.



Because water vapour is the dominant greenhouse gas, the additional water
vapour absorbs even more energy, so global temperatures rise even, more
causing still more water to
evaporate and so on in an amplifying spiral. In this way the roughly half
degree direct impact from doubling carbon dioxide is claimed to be
amplified to three degrees or more.



An interesting theory, but now consider the following scenario;



We know the earth rotates about an axis tilted about 23 degrees relative
to the sun. This
is what causes the seasons and what sets the Tropics of Cancer and
Capricorn. Imagine a location on the Tropic of Capricorn (23 degrees
south) - say Mackay in Queensland.



In summer the sun is directly overhead - average solar input of around 310
watts/sq meter.



In winter the sun is at maximum elevation 44 degrees - average solar input
of around 220 watts/sq meter.



That is a difference summer to winter of about 90 watts/sq meter which,
according to Stefan's law, without any feedbacks would give a temperature
difference summer to winter of about 16 degrees.



The amount of positive or amplifying feedback claimed by the IPCC would
inflate that about 6 times to more than 90 degrees C, extinguishing all
life in Mackay.



http://jennifermarohasy.com/blog/





Warmest Regards



Bonzo


--
You know of course that in most parts of the world, pain is a second
language, people understand it better than words because you can get
right to the point.
- Capt Real Estate

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