In this talk, I will provide a personal perspective on current challenges in the field of stratospheric ozone science and observing. The talk will include a discussion of how long-term datasets inspired novel worldwide research that inspired public policy and led to new directions in understanding heterogeneous chemistry and atmospheric composition. I summarize my view of current...
The Montreal Protocol on Substances that Deplete the Ozone Layer mandates a quadrennial report from their Scientific Assessment Panel under Article 6 of the agreement. The most recent assessment was the “Scientific Assessment of Ozone Depletion 2022” (https://ozone.unep.org/system/files/documents/Scientific-Assessment-of-Ozone-Depletion-2022.pdf). The potential areas of focus for the 2026...
The Ozone Essential Climate Variable has been an essential part of ESA’s Climate Change Initiative (CCI, https://climate.esa.int/en/projects/ozone). This initiative strives to develop, mature, generate, and sustain harmonised, consistent, and validated multi-decadal multi-satellite ozone time series specifically for climate monitoring, climate modelling, and climate research...
At present, volcanic sulfate aerosols can lead to stratospheric ozone loss under the presence of anthropogenic chlorofluorocarbons (CFCs). Previous Chemistry Climate Model Initiative (CCMI-1) simulations showed that the Antarctic ozone hole is expected to be recovered by around 2060, although these simulations did not consider future volcanic eruptions. While atmospheric CFC levels have...
Lower stratospheric ozone between 60S and 60N has continued to decline since 1998, in spite of the reduction of ozone-depleting substances as a result of the Montreal Protocol. Previous studies have shown that Chemistry Climate Models are not able to reproduce these negative trends in mid-latitudes, but the underlying reason for this discrepancy between models and observations remains...
We present the coherent pair of the GOME-type Total Ozone Essential Climate Variable (GTO-ECV) and the novel GOME-type Ozone Profile Essential Climate Variable (GOP-ECV) data records. Both GTO-ECV and GOP-ECV cover more than two and a half decades starting in mid-1995, and both rely on measurements performed with an extended series of European nadir-viewing satellite sensors including GOME,...
The design of the Ozone Mapping and Profiler Suite (OMPS) Nadir Mapper and Nadir Profiler includes a pair of solar diffusers. The working diffuser is used every two weeks and the reference diffuser is used once a year. Combined with a stable orbit -- fixed Equator crossing time -- these measurements have proven to provide a very good set of data for characterizing the changes in the S-NPP OMPS...
Creating homogenized long-term ozone datasets using profile data by limb-viewing measurements from European and ESA Third Party satellite Missions is one of the objectives of the ESA Climate Change Initiative (Ozone-CCI) project.
In the framework of Ozone-CCI, several datasets of ozone profiles are created. The datasets from individual instruments are collected in the user-friendly HARMonized...
The Stratospheric Water and Ozone Satellite Homogenized (SWOOSH) database is a monthly mean merged data set of vertically resolved ozone and water vapor data from a subset of limb profiling instruments operating since the 1980s. In this presentation, we summarize recent updates and improvements to SWOOSH ozone data that were made as part of the current version 2.7. Changes include updated...
Observations in limb geometry from satellite platforms provide information with high spatial and temporal coverage and a good vertical resolution. Ozone profiles from SCIAMACHY (2002-2012) and OMPS-LP onboard Suomi-NPP (2012-present) have been retrieved at the University of Bremen using the same radiative transfer model, spectroscopic databases and a similar retrieval algorithm. Within the...
