Genghis the Engineer
Ok , I only have a humble BSc so I dont profess to be an expert but my reading of Global Warming theory is that the atmosphere is largely transparent to incoming radiation but enthusiastically absorbs longer wave radiation re-radiated from surfaces heated by incoming radiation.
Most of the return radiation is already absorbed by the existing mix of gases , most importantly H2O vapour. But there is not an infinite amount left to absorb. The idea that cirrus at over 30,000 ft can capture any residual radiation on the way out seems fanciful.
Like to see a reference to the original paper. Reading has a reputation of seeing Global Warming in everything.