I guess I had always realized that a light rain brings out that "it-just-rained" smell more than heavy rains, but never thought about why.
I really need to be more curious.
https://newsoffice.mit.edu/2015/rainfall-can-release-aerosols-0114
A place to discuss the ecology and evolution of plants as well as the functioning of ecosystems. Companion to Resource Strategies of Wild Plants, Princeton University Press.