This question was originally posted on Physics SE, (now deleted) but I think this community is a better fit.
This time around 12 new terms have been added. The best known of these is asperitas, meaning rough-like in Latin, as the clouds can look like the tossing of the waves at sea when viewed from below.
I am aware that these are not new cloud types per se, rather the article is referring to a reclassification system.
These cloud types in all probability have been in existence for a long time, and it is due to the increasing use of cameras on smartphones that has contributed to their new prominence in the Atlas. The article I cite above includes references to the well known jet contrails, but does not ascribe any more significance to these cloud classifications than that.
In terms of the way the WMO classifies clouds, they have also added one new "species" - the volutus, or roll-cloud, a low horizontal tube-shaped cloud mass that appears to roll about a horizontal axis.
My question, promoted by this reclassification of existing cloud types, is: could new cloud types be associated with human activity and, (a tenuous connection I admit), could we use the amount of these putative new cloud types to act as a crude marker of our impact on the current atmospheric environment?
I would stress that the website of the International Cloud Atlas makes no obvious, at least on initial reading, link to my question above.
I am aware of the Penn State Jet Trail Research regarding jet trails, in particular their absence from the atmosphere following the 9/11 attacks and subsequent temporary flight ban.