Scientists estimated in January that the recovery of Earth's ozone layer was back on track. But a new study finds that increased levels of wildfire smoke in the atmosphere could delay that recovery.
The researchers hypothesized that oxidized organics, particularly organic acids, within smoke released by wildfires increase the solubility of hydrochloric acid in the lower stratosphere.
The researchers tested their hypothesis by comparing simulations of the proposed chemical process with atmospheric observations of the Southern Hemisphere mid-latitudes following the 2019–2020 Australian wildfires. The researchers noted that the change is relatively small compared to other forms of ozone loss in the mid-latitudes, but they stressed the effect could become more pronounced if wildfires become more frequent or intense in the future.
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