2016/07/01 by Susan Solomon, Diane J. Ivy, D. E. Kinnison +3 · 3 citations
Earth and Planetary Sciences · Environmental Science · #Atmospheric Ozone and Climate #Atmospheric chemistry and aerosols #Atmospheric and Environmental Gas Dynamics
paper · doi:10.1126/science.aae0061
openalex publication_date 2016/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Industrial chlorofluorocarbons that cause ozone depletion have been phased out under the Montreal Protocol. A chemically driven increase in polar ozone (or "healing") is expected in response to this historic agreement. Observations and model calculations together indicate that healing of the Antarctic ozone layer has now begun to occur during the month of September. Fingerprints of September healing since 2000 include (i) increases in ozone column amounts, (ii) changes in the vertical profile of ozone concentration, and (iii) decreases in the areal extent of the ozone hole. Along with chemistry, dynamical and temperature changes have contributed to the healing but could represent feedbacks to chemistry. Volcanic eruptions have episodically interfered with healing, particularly during 2015, when a record October ozone hole occurred after the Calbuco eruption.