Explanation
Ozone concentration in the atmosphere is commonly measured in:
(B) Dobson Units (DU).
Dobson Units (DU) is the standard unit used to measure the concentration of ozone in the Earth's atmosphere. It represents the thickness of the ozone layer if it were to be compressed to a specific pressure and temperature. One Dobson Unit is equal to a layer of ozone that would be 0.01 millimeters thick if it were brought to a standard pressure and temperature.
Ozone concentration is typically measured using instruments such as spectrophotometers, ozone sondes, and satellite-based sensors. These instruments measure the amount of ozone at different altitudes and provide valuable information for monitoring ozone depletion, assessing air quality, and studying atmospheric processes.
It is important to note that other units such as parts per billion (ppb) and parts per million (ppm) are also used in certain contexts to express ozone concentrations, particularly in air pollution measurements and industrial settings.
