Ground breaking Experiment Debunks ‘Back radiation’ Greenhouse Effect
Written by PSI staff
A debate raging among climate researchers over whether earth gets added warmth from ‘back radiation’ from the atmosphere may finally be settled by an experiment. New evidence from an independent laboratory in Mexico proves climate researchers may have misinterpreted contamination of their instruments for the supposed extra ‘back radiation’ heating effect.
The graphic above illustrates the basic concept of ‘heat trapping’ in the atmosphere whereby infrared ‘back radiation’ returns from the clouds and sky to supposedly provide additional heat (or delayed cooling) at earth’s surface. This mechanism is known among climate researchers as the greenhouse gas effect.
Professor Nasif Nahle has published a groundbreaking paper ‘Observations on “Backradiation” during Nighttime and Daytime‘ applying a robust series of real time measurements of thermal radiation from the atmosphere and surface materials during nighttime and daytime.
Equipped with an array of radiometers, pyrometers and related sensitively calibrated instruments the professor from Monterrey, Mexico engaged in systemically measuring radiation from the sky for a period of night times and day times from a fixed position.
“I demonstrate that warming backradiation emitted from Earth’s atmosphere back toward the earth’s surface and the idea that a cooler system can warm a warmer system are unphysical concepts.”
Professor Nahle had been intrigued by a long-standing claim among climate scientists that a key mechanism of the so-called greenhouse gas theory of climate change presents two anomalies of concern among experts from the ‘hard’ sciences.
To skeptics of the greenhouse gas theory the two key problems are:
1.) Does thermal radiation emitted by a cooler atmosphere warm up a warmer surface by backradiation? 2.) What infrared thermometers, radiometers, pyrgeometers, and pyrometers are measuring when they are pointed up towards the sky?
Professor Nahle discovered that what climate researchers have been claiming as ‘back radiation’ heating from their infrared meters is “contamination” from the instrument itself and not the byproduct signal of any supposed ‘back radiation’ heating.
The field of view of IR thermometers, radiometers, pyrgeometers, and pyrometers goes up, up, up, until it stumbles upon a lower density region at higher temperature than the surroundings that is absorbing, scattering, reflecting , and emitting solar thermal radiation. Radiometers and IR thermometers make an average  of the globules of hot air and the thermal radiation from cirri into the whole trajectory of their fields of view. I have found also that as we place radiometers and IR thermometers pointing sides at an angle of 0°, that is when the field of view of the radiometer is parallel to surface, we measure thermal radiation of globules of hot air which wrap the cells of the device.
Professor Nahle continues:
Does thermal radiation emitted by a cooler atmosphere warm up a warmer surface by backradiation? No, thermal radiation emitted by the atmosphere does not warm up the warmer surface.
This argument is unphysical because the thermal radiation emitted by the atmosphere is never higher than the thermal radiation emitted by the surface and it decreases in time in accordance to the thermal radiation emitted by the surface; additionally, the negative change of temperature of the atmosphere increases in time, contrary to what would happen if it were warming up the surface.
What are infrared thermometers, radiometers, pyrgeometers, and pyrometers measuring as they are pointed up towards the sky? Infrared thermometers, radiometers, pyrgeometers, and pyrometers measure thermal radiation limited by the range adjusted at 0.1-14 μm emitted from cirri and globules of air at different heights, which are rising vertically through the atmosphere.
In other words, Infrared thermometers, radiometers, pyrgeometers, and pyrometers are measuring apparent temperature, i.e. content of thermal energy of an array of highly variable subsystems in the atmosphere, not thermal backradiation. There are not surfaces emitting radiation in the atmosphere. The recorded values correspond to a combination of radiation which is an average made by the instruments from a series of instantaneous measurements of globules of air moving up, stratus clouds, water vapor present in the atmosphere, and dust particles. In conclusion, backradiation from a cooler atmosphere warming up a warmer surface is a myth that is 100% discredited by correct unbiased experimentation.
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