Author : D J C URL :Comment:
Just remember there's going to be a genuine $5,000 reward for the first to come up with proof I'm wrong and proof IPCC are right about water vapour - see last paragraph..
In a horizontal plane you can observe diffusion of kinetic energy in your home. Just run a heater on one side of a room, turn it off or even remove it quickly from the room, and you will temporarily have measureably warmer air on one side of the room. Molecules then keep on colliding and as they do, kinetic energy is shared. Statistical mechanics tells us that temperature (that is, mean kinetic energy per molecule) will even out across the room assuming it's well insulated.
Suppose now that the room has double glazed windows and it's cooler outside. Which is more effective at insulating the room?
(a) A window with dry air or even argon
(b) A window with moist air - say 4% water vapour or water gas
(c) A window full of carbon dioxide only, like the Venus atmosphere?
The answer is the dry air or argon, as is well known in the construction industry. Why? Because radiating "pollutants" like water gas and carbon dioxide send the energy across the gap (and up through the troposphere) with inter-molecular radiation. Such radiation only ever transfers thermal energy from warmer to cooler regions. Otherwise what happens is as described in "Radiated Energy and the Second Law of Thermodynamics."
Why then does the thermal gradient reduce in magnitude because of the inter-molecular radiation between carbon dioxide molecules in the Venus atmosphere, or between a few methane molecules in the Uranus troposphere or between water vapour molecules in Earth's troposphere and Earth's outer 9Km of its crust?
All these thermal gradients (aka lapse rates) are less steep than they would have been in dry air or (nearly) non-radiating gases. Gravity would have induced a steeper -g/Cp gradient.
The thermal gradient in the Uranus troposphere does not level out (despite no solar radiation or any surface) because to do so would violate the Second Law of Thermodynamics. It seems most of you don't understand why, but the reason is that entropy would decrease. If somehow a state were to evolve with more gravitational potential energy per molecule at the top, but no compensating reduction in kinetic energy per molecule (ie temperature) then there would be unbalanced energy potentials at the top, so work could be done and thus entropy would not have been at a maximum. The four molecule experiment demonstrates this and how it happens at the molecular level.
The vortex tube demonstrates it, and kinetic energy is re-distributed such that the inner tube gets far colder than the air that was pumped in. So you can't blame friction for heating the outer tube. Nor does pressure alter temperature, because pressure is proportional to the product of temperature and density: temperature is an independent variable and only varies when mean kinetic energy per molecule varies.
Finally, none of you can explain how the Venus surface actually rises in temperature from 732K to 737K during its four-month-long day, unless you start by understanding that the thermal gradient is the state of thermodynamic equilibrium. Then you need to understand the mechanism of "heat creep" explained in the second part of the four molecule experiment.
There will be a $5,000 reward for the first to prove me wrong with conditions explained in public advertisements and on all of a dozen or so of my websites. To win the award you will also have to show empirical evidence of the IPCC postulate that the sensitivity to water vapour is of the order of 10 degrees of warming for every 1% increase in the Earth's troposphere.