One aspect that there are few questions (so far) about atmospheric radiation (e.g. ultraviolet A and B; applications of Beer's Law; etc). I am a bit biased about this as it is my primary area of expertise - I have seen these on Physics.SE, but with very little attention over there.
Would questions related to atmospheric radiation be on topic?
An example question would be the interaction with particular aerosols with solar UV radiation. If so, I can happily write a few QA's for them.
Edited to add: related, would it be feasible to create a atmospheric-radiation tag once I get started.