http://www.sealevel.info/blogroll.html#warrenmeyer ]]>

Hence there is no need for James Hansen’s guesswork that radiation from a cold atmosphere must be heating an already-warmer surface, because it is the force of gravity acting on molecules between collisions that produces both a density gradient and a temperature gradient. The Second Law of Thermodynamics tells us that in Nature there is an autonomous propensity for a system to move towards the state of thermodynamic equilibrium, which state has maximum entropy. However, this state in a force field is NOT isothermal. That is, there exists a non-zero temperature gradient which we can understand and quantify using the Kinetic Theory of Gases.

This fact, known about by physicists since the 19th century, completely demolishes the greenhouse. Hansen assumed isothermal conditions without GH gases, but that is NOT what the Second Law of Thermodynamics indicates will tend to occur. See http://climate-change-theory.com for more detail.

In the state of thermodynamic equilibrium (that is, maximum entropy) in a column of the troposphere the pressure from above and below any horizontal plane is equal. Because pressure is proportional to the product of temperature and density, and because there can be no transfer of energy or matter across any internal boundary when there is thermodynamic equilibrium, we can deduce that, for any horizontal plane, there must be equal numbers of molecules crossing upwards as there are crossing downwards, and the mean kinetic energy of each group while crossing the plane must be equal.

Now for the temperatures to be equal when crossing this means that (because molecules gain Kinetic Energy with downward motion) there must have been lower mean molecular Kinetic Energy (temperature) above the plane and warmer temperature below. Hence there is a stable equilibrium temperature gradient resulting from the entropy maximization process described in statements of the Second Law of Thermodynamics.

]]>