Thickness of ozone in a column of air from ground to the top of atmosphere is measured in

Options

A. decible
B. pounds
C. liters
D. dobson unit

Answer

To determine the thickness of ozone in a column of air from the ground to the top of the atmosphere, we follow these steps:

### Step-by-Step Solution:

1. **Understanding Ozone Measurement**: The thickness of ozone is a measure of how much ozone is present in a vertical column of the atmosphere, from the surface of the Earth to the top of the atmosphere.

2. **Identifying Measurement Units**: Various units can be used to measure thickness, including decibels, pounds, liters, and Dobson units. However, not all of these units are appropriate for measuring the thickness of ozone.

3. **Recognizing the Correct Unit**: Among the options provided, Dobson units (DU) are specifically designed for measuring the amount of ozone in the atmosphere. One Dobson unit corresponds to a layer of ozone that would be 0.01 millimeters thick at standard temperature and pressure.

4. **Conclusion**: Therefore, the thickness of ozone in a column of air from the ground to the top of the atmosphere is measured in Dobson units.

### Final Answer:
The thickness of ozone in a column of air from ground to the top of the atmosphere is measured in **Dobson units**.

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