At 09:53 PM 24/09/2007, you wrote:
>Ah, climate change - the soaring pilot's friend!
>
>Any X/C in the midst of that height?
>
>MP.
>
Ah! Climate change! Is there anything it it isn't responsible for?
Better figure out if there is any first.
See www.climateaudit.org (breakers of the infamous "hockey stick")
Fairly technical.
There are links there to other sites.
Yes the climate changes. Lesson one at meteorology school was that 30
year averages were taken at weather stations to define the climate
because it was well known that it changed on time scales longer than
that so any longer averages weren't meaningful. Nobody was blaming CO2.
A few facts:
Of the CO2 going in to atmosphere each year the human race is
responsible for under 4%.
There's currently around 380 ppmv of CO2. It is increasing around 0.5
to 1% of that per year.(It varies from year to year and seasonally -
hint - fossil fuel burning doesn't). Obviously there are lots of CO2 sinks.
The temperature effect of increased CO2 is small - and as the effect
on temperature is logarithmic most of the temperature effect has
already occurred.
The catatrophic warming predictions depend on increased temperature
causing increased water vapour which further increases the
temperature as H2O is also a greenhouse gas(not as good as CO2 but
there's usually lots more of it - 0 to 4% of the atmosphere).
Positive feedback. Any engineer will tell you that systems with
positive feedback are unstable and tend not to stay in one state for
long, usually crashing between extremes.
I'll leave it as an exercise for you to find the evidence for this
positive feedback. I mean *evidence* not computer models. If you can
there's US$100,000 on offer at www.junkscience.com
Is there human caused climate change? Almost certainly. Land use
changes are a very likely contributor. Changes albedo and lost of
other things when you remove vegetation and replace with bitumin,
concrete and buildings or clear trees for farmland. I got stuck with
explaining this to a bunch of environmental science students in a
lecture in 1977.
The human race doesn't know nearly enough about planetary systems but
we have to be careful to use real science not political hysteria
promoted by scammers (Al Gore's in town BTW)
Mike
Borgelt Instruments - manufacturers of quality soaring instruments
phone Int'l + 61 746 355784
fax Int'l + 61 746 358796
cellphone Int'l + 61 428 355784
Int'l + 61 429 355784
email: [EMAIL PROTECTED]
website: www.borgeltinstruments.com
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