Dobson unit

 
(abbreviation: DU)

noun

  • a unit of measurement for the total amount of ozone in the atmosphere above a point on the earth’s surface, one Dobson unit being equivalent to a layer of pure ozone 0.01 mm thick at standard temperature and pressure.

Origin:

1980s: from the name of G. M. B. Dobson (1889–1976), British meteorologist