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<p>The Hunga Tonga-Hunga Ha&rsquo;apai volcano changed the chemistry and dynamics of the stratosphere in the year following the eruption, leading to unprecedented losses in the ozone layer of up to 7% over large areas of the Southern Hemisphere, according to a recent study published in the<a href="https://www.pnas.org/doi/10.1073/pnas.2301994120" target=" blank">&nbsp;Proceedings of the National Academy of Sciences</a>&nbsp;(PNAS) from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and the University of Maryland.</p> <p>&nbsp;</p>

United statesNew zealandHunga haapaiDavid wilmouthRoss salawitchJames andersonJessica smithNational science foundation under grant noHarvard johna paulson school of engineeringUniversity of marylandProceedings of the national academy sciencesHunga tonga ha apaiSouth pacificSouthern hemisphereNational academyHarvard john