Recent observations have shown that the ozone layer over Antarctic shows signs of healing. Critically examine.

Question

Ghissu Editorial · Accepted Answer

The Antarctic ozone layer is genuinely healing, with smaller, later-forming holes and falling chlorine levels, largely thanks to the Montreal Protocol. Recovery remains slow and fragile because long-lived ODS, illegal CFC emissions, volcanic events and climate-driven stratospheric cooling can set it back, with full recovery expected around the 2060s.

**Introduction**

The Antarctic ozone layer, vital for blocking harmful UV radiation, shows signs of healing due to global efforts and climatic factors. Examining scientific evidence, causes, and challenges reveals the complexity of this recovery.

**Scientific Evidence and Causes**

SKETCH: pyramid | Factors Driving Antarctic Ozone Healing
- International Policy (Montreal Protocol)
- Declining Stratospheric Chlorine
- Polar Vortex Dynamics
- Scientific Research & Monitoring

1. **Observed Recovery Trends**: Satellite and ground-based data since the 2000s show gradual ozone increase and shrinking ozone holes, with contributions from India's ==Maitri and Bharati⟦1⟧== stations enhancing global monitoring.

2. **Montreal Protocol Success**: The international treaty, ratified by India in 1992, has effectively reduced ODS like CFCs, correlating with ozone layer recovery.

3. **Stratospheric Temperature and PSCs**: Polar stratospheric clouds still form each winter, but with less chlorine and bromine to activate on them, ozone destruction has eased, aiding healing.

4. **Scientific Collaboration**: India's hosting of the 46th Antarctic Treaty Consultative Meeting in ==Kochi in 2024== highlights global South cooperation in polar governance and ozone monitoring.

**Challenges and Limitations**

1. **Long ODS Lifetimes**: Persistent banned substances delay full Antarctic recovery, projected only around 2066.

2. **Climate Change Effects**: Global warming alters stratospheric temperatures and circulation, sometimes promoting PSC formation and ozone loss.

3. **Illegal ODS Emissions**: Unauthorized CFC production threatens recovery, underscoring enforcement challenges.

4. **Regional Vulnerabilities**: ==Coastal Andhra Pradesh== faces UV risks from ozone fluctuations, impacting agriculture and health.

**Way Forward**

1. **Strengthen ODS Enforcement**: Enhance monitoring and penalties using international cooperation and India's Antarctic research.

2. **Integrate Climate and Ozone Policies**: Align climate action with ozone protection, building on steps like the Kigali Amendment, which phases down HFCs that are potent greenhouse gases.

**Conclusion**

Antarctic ozone healing is evident but fragile, requiring sustained global commitment and integrated climate governance to secure long-term recovery.

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