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Polar Low Induced Surface Ozone and HDO Depletion

Ground-based and satellite datasets were used to identify two similar polar low induced surface ozone depletion events in Eureka, Canada on March 2007 and April 2011. These two events coincident with observations of depleted HDO, indicate the condensation process during the transportation of the ozone depleted airmass. Lidar and radar measured the ice clouds and aerosol when the ozone and HDO depleted airmass arrived in Eureka. Two global chemical-climate models were used to simulate the surface ozone depletion. A global reanalysis model data and a particle dispersion model were used in this work to study the link between the ozone and HDO depletion. Observational and modelled data show these events have the distinctive feature of coincident of the strong tropospheric cyclone and intensified stratospheric vortex.