2024/09/25 by Paul A. Newman, Leslie R. Lait, N. A. Kramarova +4 · 1 voice
Earth and Planetary Sciences · Environmental Science · #Atmospheric Ozone and Climate #Atmospheric chemistry and aerosols #Atmospheric and Environmental Gas Dynamics
paper · pdf · doi:10.1029/2024gl110924
openalex publication_date 2024/09/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Abstract Observations of March 2024 Arctic (63°N–90°N) total column ozone set a record high of 477 Dobson Units (DU) against the 1979–2023 satellite era time series. It was about 60 DU higher than average and 6 DU higher than the previous March 1979 471 DU record. Daily Arctic ozone was above average for every day in March 2024, and set record highs from 11–26 March 2024. Microwave Limb Sounder data show this record ozone anomaly was concentrated in the lower stratosphere (10–30 km). These record values developed over the 2023–2024 winter and can be associated with vertically propagating planetary‐scale wave events that caused significant stratospheric warmings. These wave events forced poleward and downward ozone advection into the lower stratosphere, leading to record column ozone levels. The above average levels persisted through August 2024 and across the northern hemisphere.