Question

What is exactly measured in Dobson units or DU?

Options

• The thickness of the ozone in a column of air from the ground to the top of the atmosphere.

• The noise level in the circumscribed area.

• The amount of chlorofluorocarbons.

• The hole in the ozone umbrella.

Answer 1

The thickness of the ozone in a column of air from the ground to the top of the atmosphere.