2:30 PM - 2:45 PM
[AAS09-16] Do stratospheric ozone measurements show large tropical width changes?
Keywords:Stratosphere, Tropical width, Tropical widening, Ozone, Satellite measurements
We assess the robustness of the previously used methodology by comparing it to a new objective gradient-based method of total column ozone. The total column ozone methodologies are then compared to a diagnostic based on vertically resolved satellite ozone data from the Stratospheric Water and OzOne Satellite Homogenized (SWOOSH) data set. Our results indicate a general lack of robustness of the previous estimates, and are more in line with other tropical widening estimates indicating poleward expansion rates of < 1° latitude decade-1.