Purpose: To experimentally test the greenhouse gas effect, GHGE. If the experiment works, the GHGE is validated. If it fails to demonstrate a GHGE, the effect is falsified.
There are three ways to move heat: conduction, convection and radiation. The GHGE is solely due to the action of infrared radiation, originating from radiatively active gases (termed GHG) warming earth's surface by an average 32°C above what the surface temperature would be with no GHGE. This GHGE is caused by the action of radiatively active gases such as carbon dioxide and water vapour in the atmosphere. So goes the basic premise of the GHGE.
Method: Take two identical nearby disks close to earth. Isolate each from conduction and convection; by putting each inside a large bowl with a lid, transparent, and loose enough to allow atmospheric pressure to equalise. The bowls are impervious to all radiation. Both bowls rest on none conductive stilts; as do the dics inside the bowls. Both lids also rest on none conductive stilts and the lids overlap the bowls. One lid is transparent to infrared, the other lid opaque to infrared. The lid/bowl assembly is done in such a way that no radiation can enter the bowl by by-passing the lid. It must all go through the lid. Both disks will be warmed by sunlight; but only one disk is warmed by downwelling infrared. The disk warmed by downwelling infrared should become noticeably warmer (up to +32°C) than the other. If both discs stay at the same temperature, a GHGE will be falsified.
'ATE': The experimental assembly will not interfere with atmospheric pressure inside the bowl. So an 'atmospheric heating effect', ATE [see Nikolov and Zeller], will be unaffected. With a GHGE, because one lid is opaque to infrared, the temperature of the disk it covers should be 32°C less than the temperature of the other disk.
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