Friday, 4 May 2007

What potential effect could man be having on global temperatures?

The mean global temperature is ~14 °C which is 287 K. The increase in the earth's temperature due to the greenhouse effect is thought to be about 33 °C (= 33 K).

The contribution to the greenhouse effect by water including water vapour and clouds is probably 80-90%; CO2 5-10%; and other gases 5-10%.

The annual production of CO2 from all sources is estimated at 200 Gtonnes. Man's input is about 7 Gtonnes. I have graphed this to show visually man's role.

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