Dobson unit"A unit used in the measure of the column abundance of ozone in the atmosphere. One Dobson unit is the equivalent of 2.69 × 1016 molecules of ozone per square centimeter.
Dobson Unit (DU) The standard way to express ozone amounts in the atmosphere. One DU is 2.7 x 1016 ozone molecules per square centimeter. One Dobson unit refers to a layer of ozone that would be 0.
What is a Dobson unit?
Ozone is measured in Dobson Units (DU). 100 DU is equivalent to a 1 millimetre thick layer of pure ozone at sea level temperature and pressure.
Is ozone being depleted?
ozoneOzone measurements are given in Dobson units and are integers with 3 significant figures. A Dobson Unit represents the physical thickness of the ozone layer if it were brought to the earth's surface.
Column Ozone: The total amount of ozone present in a column of the Earth's atmosphere from the surface to the top of the atmosphere. It includes both surface level ozone and ozone found in the ozone layer. Measurement is either in Dobson Units ...
 See also: Temperature, Ozone, Air, Light, Latitude
  
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