Note by: dai: Sunday 17th of December 2017 11:36 AM, EAT

A Climate Challenge

The fundamental assumption at the base of the climate consensus view is that blocking of radiated energy by radiative (greenhouse) gasses is the only factor raising the Earth's mean surface temperatures to current levels. For the past decade, at least, there has been an alternative explanation in the thermal buffering provided by our atmosphere and ground over the daily temperature cycle.

This can be seen most simply in the DIVINER temperature data for the moon. Rather than dropping to around -270 C near the absolute zero of space, as it would if the surface was a perfect thermal insulator, it drops to around -150 C at sunset then slowly down to below -270 C over the lunar night as the ground cools. During the day it rises to around 100 C, or lower than it would if the surface wasn't absorbing heat.

Due to the nonlinear relationship between radiated energy and temperature, E = aT^4, a temperature drop of, say, 1C during the day drops radiated energy far more than the same increase in temperature increases radiation at night. The mean surface temperature rises to regain radiative balance over the daily cycle. This is basic undergraduate physics and simple spreadsheet models give good agreement with observation.

Calculation for the Earth is more complex due to the varying nature of our surface, but simple calculations show that this effect, alone, is capable of fully accounting for our suface temperatures.

Because the GHE is not the only game in town, the original assumption needs justification. To remain plausible and scientifically valid it needs quantification. Those supporting the IPCC position need to show that the buffering effect is less than 1% of the generally accepted values of 60-100 C, and that the GHE is 200 times greater than the 0.14 C I calculate it to be.

Posted as comment in WUWT 171122:Radiative Heat Transfer by CO2 or “what’s the quality of your radiation?