My only postulation was that CO2 in a beaker traps heat more efficiently than air.It looks like a 'new' field of science has just been invented by the mind of a layman ... paraphrasing: "CO2 in a beaker traps more heat than air" ... how does that work exactly?
What factors are at work here: conduction, absorption, emittance, reflection maybe?
Are you referring to a 'standard atmosphere' for the air parcel - can a greater amount of water vapor be specified to see how that affects the 'trapping' (your word) of 'heat'?