A measure of atmospheric ozone; 1 Dobson unit corresponds to 0.01 millimeters of ozone, assuming all of the ozone in the atmosphere at a location has been confined to one layer at 1 atmosphere of pressure and 0° C.
DOBSON UNIT (DU)
Meaning of DOBSON UNIT (DU) in English
Weather and meteorology English vocabulary. Английский словарь погоды и метеорологии . 2012