The second SPARC/WMO Long-term Ozone Trends and Uncertainties in the Stratosphere (LOTUS) workshop took place in Geneva, September 17-19, 2018 (https://events.oma.be/indico/event/56/overview).
About 30 participants gathered to discuss open issues remaining after publishing the SPARC/WMO LOTUS report that was aimed at providing timely input to the 2018 Ozone assessment.