- The atmosphere of the Earth acts like a cooling system by transporting heat absorbed from the Sun to the top of the atmosphere TOA from where it is radiated to outer space.
- 240 Watts/m2 is radiated from a TOA at 5 km altitude at a blackbody temperature of 255 K.
- The heat absorbed by the Earth surface is transported to TOA mainly by thermodynamics (convection including evaporation/condensation) and partly by radiation.
- The theoretical isentropic thermodynamical lapse rate is 10 K/km.
- The observed lapse rate is about 7 K/km.
- The 3K reduction of lapse rate is a result of evaporation at the ocean surface (subtracting heat) and condensation towards TOA (adding heat).
- The effective lapse rate of 7 K/ km sets the Earth surface temperature to 288 ~ 255 + 7 x 5 K.
- Increasing evaporation decreases the lapse rate, and thus the surface temperature.
- Increasing greenhouse gases GHG = reduced heat transport by radiation = increased evaporation/condensation required to keep heat balance.
- Ergo: Increasing GHG reduce surface temperature = global cooling.
- More CO2 = Global Cooling!
onsdag 16 juni 2010
Elementary Climate Mathematics: CO2 Cooling
We condense the previous post into:
Do you believe it?
To help reaching a conclusion, note that the above argument combines thermodynamics and radiation, while the claimed GHG global warming is based on radiation only. You may also recall that a refrigerator/air conditioner works by thermodynamics of expansion-evaporation-cooling + compression-condensation-warming just like in the above model of the atmosphere.
A refrigerator working by radiation only would be wonderful, but nobody has been able to
construct such a device.