A213-0002
Observations and Chemical Transport Model simulations of Ozone, Trace Gases and Meteorological Variables over Ross Island, Antarctica (78S,167E) during the 2019 Austral Spring and Summer.

Wednesday, 16 December 2020
Poster
Dan Smale1, Susan Elaine Strahan2, Richard Querel1, Gerald E Nedoluha3, Sylvia Nichol4, Udo Friess5, Ian Stuart Boyd6 and Scott Base Science Technicians, (1)National Institute of Water & Atmospheric Research (NIWA), Lauder, New Zealand, (2)Universities Space Research Association, NASA/code 614, Greenbelt, MD, United States, (3)Naval Research Lab, Washington, DC, United States, (4)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, (5)University of Heidelberg, Heidelberg, Germany, (6)University of Massachusetts, Amherst, MA, United States
Abstract:
Using ground-based spectroscopic remote sensing measurements of stratospheric trace gases (O3, HCl, ClO, BrO, HNO3, NO2, OClO and ClONO2), along with radiosonde profiles of temperature and wind speed, we track the springtime development of the 2019 'ozone hole' chemical composition over the Ross Island region of Antarctica during the so-called 2019 sudden stratospheric warning (SSW) event. Soundings are compared to NCEP meteorological products and trace gas measurements are compared to MERRA-2 GMI simulations. Both measurements and modelling show low ozone depletion over the Ross Sea region resulting from an extraordinarily warm stratosphere within the polar vortex.
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