Articles | Volume 11, issue 1
https://doi.org/10.5194/esd-11-301-2020
https://doi.org/10.5194/esd-11-301-2020
Research article
 | 
26 Mar 2020
Research article |  | 26 Mar 2020

Winter hydrometeorological extreme events modulated by large-scale atmospheric circulation in southern Ontario

Olivier Champagne, Martin Leduc, Paulin Coulibaly, and M. Altaf Arain

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Latest update: 24 Jun 2024
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Short summary
Southern Ontario has seen more high flows in winter recently due to earlier snowmelt. We show that 10 mm of daily rain and temperature higher than 5 °C are necessary conditions to generate winter high flows in the historical period. These conditions are associated with high pressure on the east coast bringing warm and wet conditions from the south. In the future, as snowfall decreases, warm events will generate less high flows, while rainfall will become a greater high-flow contributor.
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