J. Liu and co-authors have produced a new ozone climatology utilising ozone soundings and trajectory techniques. The data cover the period 1965-2008, and are available as monthly means at a resolution of 5°x5° from the surface through to 26km. The dataset compares well with SAGE and OSIRIS seasonal and zonal means, with maximum differences of 20% found above 15km. Agreement is better in the northern hemisphere, where more ozone soundings are available, and in the mid- and high latitudes, where reanalysis winds are more accurate. The full abstract can be found here.