University of Saskatchewan
Understanding lower stratospheric ozone trends from satellite data and model simulations — Despite the success of the Montreal Protocol in phasing out ozone depleting substances, lower stratospheric ozone continues to decrease. Currently it is not clear, if this ongoing decrease is related to so far unexplored chemical effects or to changes in the atmospheric circulation, the large-scale movement of air by which ozone is redistributed. The proposed project will use satellite measurements from OSIRIS and ACE-FTS in combination with simulations from the Canadian Earth system model to understand lower stratospheric ozone changes and driving forces. Based on the improved understanding, predictions of ozone recovery in the lower stratosphere will be produced.