Multi-Sensor Reanalysis (MSR) of total ozone, version 2

The ozone multi-sensor reanalysis (MSR) is a multi-decadal ozone column data record constructed using all available ozone column satellite data sets, surface Brewer and Dobson observations and a data assimilation technique with detailed error modelling. The result is a high-resolution time series of 6-hourly global ozone column fields and forecast error fields that may be used for ozone trend analyses as well as detailed case studies. The MSR-2 (MSR version 2) consists of an ozone record initially for the years 1970-2012. This period has been and will be regularly extended to include subsequent years. In 2023 data over 1970-1979 was recalculated with updated ozone measurements and at the same time extended backwards to 1960.