Question

The thickness of ozone in a column of air from the ground to the top of atmosphere is measured in terms of

Answer 1

The correct answer is - in terms of the thickness of the ozone layer that is occupied at standard temperature and pressure (STP).

Total ozone is used to refer to the total amount of ozone that is contained in a vertical column of the atmosphere which is above the ground and extends from the surface of the Earth to the top edge of the atmosphere.

The most commonly used units to measure total ozone are -

(i). Column thickness of pure ozone layer at STP.

(ii). Vertical column density.

Answer 2

The thickness of ozone in a column of air from the ground to the top of atmosphere is expressed in terms of a thickness of a layer it would occupy at standard temperature and pressure.

The spectrophotometer is used to measure the total amount of ozone in the atmosphere. Total ozone refers to the total amount of ozone contained in a vertical column in the atmosphere which extends from the surface of the Earth to the upper edge of the atmosphere. 

The units used to measure total ozone are:

i. Column thickness of a layer of pure ozone at standard temperature and pressure (STP).

ii. Vertical column density (number of molecules per area).