All the viable microorganisms in the air have been transferred to the atmosphere either from the land or the sea. A comparison of the micro-flora of marine air with that of normal sea water and of land areas should indicate the major source of organisms in the atmosphere over the ocean.
Rittenberg, Sydney C.. 1939. "Investigations on the microbiology of marine air." Journal of Marine Research 2, (3). https://elischolar.library.yale.edu/journal_of_marine_research/555