The Dobson unit (DU) is a unit of measurement of the amount of a trace gas in a vertical column through the Earth's atmosphere. It originated by, and continues to be primarily used in respect to, the study of atmospheric ozone, whose total column amount, usually termed "total ozone", and sometimes "column abundance", is dominated by the high concentrations of ozone in the stratospheric ozone layer.
the dobson unit (du) is a unit of measurement of the amount of a trace gas in a vertical column through the earth's atmosphere it originated by and continues to be primarily used in respect to the study of atmospheric ozone whose total column amount usually termed "total ozone" and sometimes "column abundance" is dominated by the high concentrations of ozone in the stratospheric ozone layer