If So, What Does It Show About Climate Change
3 hours ago Guest Blogger
By Charles T Blaisdell PhD ChE
Abstract
The mathematical world of climate change is dominated by radiation, W/m^2, shortwave, SW, and longwave, LW. Many diagrams show radiation arrows going up and down all entering or exiting the top of the atmosphere, TOA, see Figure 1 for an example. The NOAA diagram (2) show SW in is equal to LW out. If SW in does not equal LW out we have climate change. The 20 year separate studies by Loeb (5) and Dubal (4) both show that the SW in and LW out are not equal over the 20 years. Leaving the questions: when did the departure from equality start, how long has it been going, what caused it, when will it stop, and is it real?
Figure 1 NOAA The Earth – Atmosphere Energy Balance, (2) (all # are in % of sun’s irradiation)
Irradiance is radiation over time, W/m^2-yr. That is: the average radiation over one year. Radiation is not energy. Irradiance is energy. This essay will show that the earth’s Enthalpy (energy) can be related to LW irradiance out. The Loeb and Dubal data only covers 20 years. The Physical Science Laboratory, PSL, cover data since 1948 from which enthalpy can be calculated.
This essay will calculate the total energy of all the annual global sources of enthalpy since 1948 from NOAA’s PSL (1) data. The enthalpy, kJ/m^2 – yr, results were converted to irradiance, W/m^2-yr. The 75 year plot of the calculated irradiance shows a good correlation to Loeb and Dubal results and suggests that the departure in SW and LW radiation started about 1975 (+/- 10). No suggestion of CO2 radiative forcing was found (no decreasing LW irradiance). The results show that atmospheric water has a small contribution to total irradiance but a significant contribution to the change in irradiance.
https://wattsupwiththat.com/2025/07/31/if-so-what-does-it-show-about-climate-change/
