It will be interesting to see what happens when (and if, although it is 'promised') will happen when the Screens get painted with this new ultra reflective white paint, with Barium Oxide in it, I think.
Reports are that it not only reflects nearly all incident radiation, especially sunlight, but also allows internal temperature to radiate outward. If that is the case, the supposition is that things will be cooler than the surrounding air. I'm not sure the final analysis is in yet and won't be until gallons of this stuff at hopefully affordable prices will be available for experimentation. The hope was that this paint would allow roofs and trailer homes and all sorts of shelters (livestock shelters, too?) to be coated and make for more comfortable situations without as much air conditioning. Humidity of course would be a continuing concern when dew points go up.
I hope this comes out soon. I'd like to set up a couple control situations, not with a Stevenson Shield since I don't have any, but with a couple of radiation shields like RM Young or Campbell Scientific side by side, one painted with the ultra white and the other just a standard one.
But as far as the shields are concerned, as a kid in the 50s I can recall going to ranger stations and where the Weather Bureau had installations and seeing these cool louvered boxes on legs, and when the slight chance of seeing inside getting to see the max min thermometers, a recording humidity and temp (Bendix?) all in there and feeling such intense jealousy as to not live closer so I could come visit more often. Of course my woodworking skills were deficient and I never could build one.
Hats off those who have or who were able to find one for sale before they became pretty hard and expensive to find.