21st Conference on Climate Variability and Change


Tornado frequency and its large-scale environments over Ontario, Canada

Zuohao Cao, EC, Toronto, ON, Canada; and H. Cai

Over the last almost six decades, there exist ever-increasing changes in tornado frequency over Ontario, Canada. It has been identified for the first time that there is a robust upward trend in tornado frequency, demonstrated through the MK test with consideration of removing a lag one autoregressive process. It is shown through a composite analysis that in the warming climate the tornado events occur more frequently over Ontario, especially under atmospheric conditions with stronger low-level cyclonic circulations, baroclinicity, and atmospheric convective instability.

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Poster Session 5, Climate trends and extremes
Wednesday, 14 January 2009, 2:30 PM-4:00 PM, Hall 5

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