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dc.contributor.authorPorchetta, Sara
dc.contributor.authorTemel, Orkun
dc.contributor.authorMunoz-Esparza, Domingo
dc.contributor.authorReuder, Joachim
dc.contributor.authorMonbaliu, Jaak
dc.contributor.authorVan Beeck, Jeroen
dc.contributor.authorvan Lipzig, Nicole
dc.PublishedPorchetta, Temel, Munoz-Esparza, Reuder J, Monbaliu J, Van Beeck, van Lipzig N. A new roughness length parameterization accounting for wind-wave (mis)alignment. Atmospheric Chemistry and Physics. 2019;19(10):6681-6700eng
dc.description.abstractTwo-way feedback occurs between offshore wind and waves. However, the influence of the waves on the wind profile remains understudied, in particular the momentum transfer between the sea surface and the atmosphere. Previous studies showed that for swell waves it is possible to have increasing wind speeds in case of aligned wind–wave directions. However, the opposite is valid for opposed wind–wave directions, where a decrease in wind velocity is observed. Up to now, this behavior has not been included in most numerical models due to the lack of an appropriate parameterization of the resulting effective roughness length. Using an extensive data set of offshore measurements in the North Sea and the Atlantic Ocean, we show that the wave roughness length affecting the wind is indeed dependent on the alignment between the wind and wave directions. Moreover, we propose a new roughness length parameterization, taking into account the dependence on alignment, consisting of an enhanced roughness length for increasing misalignment. Using this new roughness length parameterization in numerical models might facilitate a better representation of offshore wind, which is relevant to many applications including offshore wind energy and climate modeling.en_US
dc.publisherCopernicus Publicationsen_US
dc.rightsAttribution CC BYeng
dc.titleA new roughness length parameterization accounting for wind-wave (mis)alignmenten_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.source.journalAtmospheric Chemistry and Physics
dc.relation.projectUniversitetet i Bergen: Bergen Offshore Wind Centre (BOW)

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