The recovering ozone layer, while protecting us from harmful ultraviolet rays, is also contributing to greater global warming than previously understood. Researchers predict that by 2050, ozone will become the second-largest driver of global warming after carbon dioxide, offsetting many climate benefits achieved by banning ozone-depleting chemicals like CFCs.
A study from Reading University highlights that between 2015 and 2050, ozone will contribute an additional 0.27 watts (WM⁻²) per square meter of Earth’s surface due to its heat-trapping capabilities. Despite the positive effects of banning CFCs and HCFCs to protect the ozone layer, this recovery could promote up to 40% more warming than earlier estimates.
The study, published in Atmospheric Chemistry and Physics, used computer models to simulate atmospheric changes under a low-pollution scenario, confirming that while removing harmful chemicals is essential, it now appears to have fewer climate benefits than anticipated. Additionally, air pollution continues to generate ground-level ozone, compounding warming effects and health issues.
Overall, while the ozone layer is crucial for preventing skin cancer and protecting ecosystems, the findings suggest that climate policies must evolve to address the increased warming impact of ozone as it recovers.
