The thickness of ozone over poles changed with the season being lowest in

Options

A. Antarctic spring
B. Polar autumn
C. Antarctic autumn
D. North hemisphere spring

Answer

**Step-by-Step Solution:**

1. **Understanding Ozone and Its Importance:**
- Ozone (O3) is a molecule composed of three oxygen atoms. It forms a protective layer in the atmosphere, primarily located between 10 km and 50 km above the Earth's surface.
- This layer is crucial as it protects living organisms from harmful ultraviolet (UV) radiation, specifically UVB and UVC rays.

2. **Seasonal Variation of Ozone Thickness:**
- The thickness of the ozone layer varies with the seasons. It is important to identify when the thickness is at its lowest.
- Generally, the thickness of ozone is greater in March and lower in October and November.

3. **Analyzing the Options:**
- The question provides four options regarding when the ozone thickness is lowest:
- A) Antarctic Spring
- B) Polar Autumn
- C) Antarctic Autumn
- D) Northern Hemisphere Spring
- Since we know that the lowest thickness occurs in October and November, we can eliminate options that refer to spring (A and D).

4. **Identifying the Correct Season:**
- Between the remaining options (B and C), we need to determine which corresponds to the lowest ozone thickness.
- The Antarctic autumn occurs around March to April, while polar autumn occurs later in the year.
- The lowest ozone thickness is typically observed during the Antarctic autumn, which aligns with the time frame of October to November.

5. **Conclusion:**
- Based on the analysis, the thickness of ozone over the poles is lowest during **Antarctic Autumn (Option C)**.

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