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Old 1st Oct 2009, 18:59
  #26 (permalink)  
cwatters
 
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This seems more believable......
So do little green men to some people. There are serious errors of fact in that..

1 MYTH Carbon Dioxide levels in our atmosphere at the moment are unprecedented (high).
FACT Atmospheric carbon dioxide levels, currently only 350 parts per million have been over 18 times higher in the past at a time when cars, factories and power stations did not exist — levels rise and fall without mankind's help.
Just because natural cycles exist it doesn't mean that man made GW doesn't exist. Should we raise C02 levels just to find out what happens?

2 MYTH Mankind is pumping out carbon dioxide at a prodigious rate.
FACT 96.5% of all carbon dioxide emissions are from natural sources, mankind is responsible for only 3.5%, with 0.6% coming from fuel to move vehicles, and about 1% from fuel to heat buildings. Yet vehicle fuel (petrol) is taxed at 300% while fuel to heat buildings is taxed at 5% even though buildings emit nearly twice as much carbon dioxide!
Natural sources are indeed large BUT they are balanced by equally large sinks.

We should tax emissions from buildings more.

3 MYTH Carbon dioxide changes in the atmosphere cause temperature changes on the earth.
FACT A report in the journal 'Science' in January of this year showed using information from ice cores with high time resolution that since the last ice age, every time when the temperature and carbon dioxide levels have shifted, the carbon dioxide change happened AFTER the temperature change, so that man-made global warming theory has put effect before cause — this shows that reducing carbon dioxide emissions is a futile King Canute exercise!
All perfectly true but so what? Increasing temperatures do indeed increase C02 levels. That's what worries scientists. Raise temperatures a little and the permafrost melts releasing C02 which increases temperatures which raises C02 etc etc. It doesn't matter which came first the chicken or the egg. Chickens make eggs and eggs make chickens.

What's more, both water vapour and methane are far more powerful greenhouse gases than carbon dioxide but they are ignored.
The effects of water vapour and methane are very definitly NOT ignored. Do you really think climate models are that simple? As the planet warms more water vapour is produced and that in turn warms the atmosphere further. All that's in the models.

Nor is methane ignored. Recent examples suggest warming has already triggered the release of methane.. Warming Of Arctic Current Over 30 Years Triggers Release Of Methane Gas

Also I would like to know why the CO2 measurements are made near an active volcano.
Because it's remote. Measurements are adjusted for local outgassing from the volcano...

Mauna Loa - Wikipedia, the free encyclopedia

We can be reasonably sure the data from Mauna Loa is ok because it shows clear seasonal C02 cycles whereas emissions from the volcano itself presumably aren't seasonal.

I also find it hard to believe the CO2 levels are similar worldwide?
But they aren't similar world wide. There is a wide variation particularly between cities and mid ocean. That's why having monitoring stations on remote islands is important even if some are near volcanos.
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