Ozone depletion over Antarctica is maximum in the month of

Options

A. September and October
B. March and April
C. June and July
D. December and january

Answer

### Step-by-Step Solution

1. **Understanding Ozone Depletion**: Ozone depletion refers to the reduction of the ozone layer in the Earth's stratosphere, which is crucial for absorbing the majority of the sun's harmful ultraviolet radiation.

2. **Identifying the Location**: The question specifically mentions Antarctica, which is known for experiencing significant ozone depletion, particularly during certain months of the year.

3. **Analyzing Seasonal Patterns**: Ozone depletion is influenced by seasonal changes. In Antarctica, the spring season (which occurs from September to November) is particularly critical for ozone depletion.

4. **Reviewing Atmospheric Conditions**: During the spring months (September to October), there is a strong circulation of winds around Antarctica. This circulation leads to the formation of polar stratospheric clouds (PSCs), which play a significant role in the chemical reactions that deplete ozone.

5. **Conclusion**: Based on the analysis, the maximum ozone depletion over Antarctica occurs in the months of **September and October**.

### Final Answer
The month when ozone depletion over Antarctica is maximum is **September and October**.

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