Definitions for "Dobson Unit"
Keywords:  ozone, stp, millimeter, thick, column
Unit used to measure the abundance of ozone in the atmosphere. One Dobson unit is the equivalent of 2.69/ x 1016 molecules of ozone/cm2.
A unit used to measure the thickness of the ozone layer. It can be visualized as a tube extending up into the stratosphere, capturing ozone (and other gases) as it goes. If all of the ozone in that tube was compressed into the bottom at a standard temperature and pressure, it would form a stack millimeters high. This number () multiplied by 100 is the number of Dobson Units.
a measurement of how thick a specific portion of the ozone layer would be if it were compressed into a single layer at zero degrees Celsius with one unit of atmospheric pressure acting on it (standard temperature and pressure - STP)