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Investigation of liquid cloud formation mechanisms during the Arctic ozone-depletion events of the 2010/2011, 2015/2016 and 2019/2020 NH winter seasons
  • Liviu Ivanescu,
  • Keyvan Ranjbar,
  • Norman O'Neill
Liviu Ivanescu
University of Sherbrooke

Corresponding Author:liviu.ivanescu@usherbrooke.ca

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Keyvan Ranjbar
University of Sherbrooke
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Norman O'Neill
University of Sherbrooke
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Abstract

The unusually cold springtime Arctic stratospheres of 2011, 2016 and 2020 generated substantial Polar Stratospheric Clouds (PSCs) activity and a significant ozone hole. These events were accompanied by an unusual presence of precipitating liquid clouds in the high Arctic. Satellite lidar measurements helped to identify a possible mechanistic link between tropospheric cloud formation and the PSCs. The synoptic meteorological context provided by the ERA 5 reanalysis was instrumental in the identification of potential liquid-precipitation formation scenarios related to atmospheric rivers.