Development of a model-based high-resolution extreme surface wind climatology for Switzerland |
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| Authors: | Stéphane Goyette |
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| Institution: | (1) Climatic Change and Climate Impacts, University of Geneva, 7 route de Drize, Geneva, Switzerland |
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| Abstract: | An innovative methodology aimed at establishing a numerical model-based high-resolution climatology of extreme winds over
Switzerland is described, that makes use of the Canadian Regional Climate Model where a new windgust parameterization has
been implemented. Self-nesting procedures allow windstorms to be studied at resolution as high as 2-km. The analysis of ten
major windstorms concludes that the average spatial pattern and magnitude of the simulated windspeeds are well captured, and
the areas that experienced extreme winds correspond well with observations and to the location where forest damage was reported
following the last two of these storms. This climatology would eventually serve to form risk assessment maps based on the
exceedance of windspeed thresholds. There is, however, a need for further investigations to encompass the full range of potential
extreme wind cases. The ultimate goal of this methodology is to assess the change in the behaviour of extreme winds for a
climate forced by enhanced greenhouse gas concentrations, and the impact of future windstorms over the Alpine region at high
resolution. |
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| Keywords: | Windstorm Wind damage Storm damage RCM Wind gust Winterstorm |
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