Taken from hypertextbook dot com "The average thickness of the ozone layer is about 50 km
but if compressed by sea-level pressures, it would be only a few
centimeters thick. The Dobson Unit (DU) is a scale for measuring
the total amount of ozone occupying a column of air. One DU is
defined as 0.01 mm thickness at zero degrees Celsius and one atmosphere.
If the ozone layer over the US were subjected to 0 °C
and 1 atmosphere it would end up being 3 mm thick or 300 DU."
but if compressed by sea-level pressures, it would be only a few
centimeters thick. The Dobson Unit (DU) is a scale for measuring
the total amount of ozone occupying a column of air. One DU is
defined as 0.01 mm thickness at zero degrees Celsius and one atmosphere.
If the ozone layer over the US were subjected to 0 °C
and 1 atmosphere it would end up being 3 mm thick or 300 DU."
