Journal article
The impact of grid and spectral nudging on the variance of the near-surface wind speed
CL Vincent, AN Hahmann
Journal of Applied Meteorology and Climatology | Published : 2015
Abstract
Grid and spectral nudging are effective ways of preventing drift from large-scale weather patterns in regional climate models. However, the effect of nudging on the wind speed variance is unclear. In this study, the impact of grid and spectral nudging on near-surface and upper boundary layer wind variance in the Weather Research and Forecasting Model is analyzed. Simulations are run on nested domains with horizontal grid spacing of 15 and 5 km over the Baltic Sea region. For the 15-km domain, 36-h simulations initialized each day are compared with 11-day simulations with either grid or spectral nudging at and above 1150 m above ground level (AGL). Nested 5-km simulations are not nudged direc..
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Awarded by Danish Council for Independent Research-Technology and Production Sciences
Awarded by EU
Awarded by South Baltic Offer-South Baltic Offshore Wind Energy Regions
Funding Acknowledgements
This work was supported by the Danish Council for Independent Research-Technology and Production Sciences (Case 10-093196) individual postdoctoral project and the EU projects NORSEWind (Contract TREN-FP7-219048) and South Baltic Offer-South Baltic Offshore Wind Energy Regions (Contract WTPB.02.02.00-56-004/09). We thank Dong Energy, Vattenfall, and the German Federal Environment Ministry (BMU) for sharing many of the observations used in the study and Anna Rutgersson (Uppsala University) for making the Ostergarnsholm data available. Thanks are given to Sven-Erik Gryning (DTU Wind Energy) and three anonymous reviewers for helpful comments on the manuscript.