Publications des scientifiques de l'IRD

Ardhuin Fabrice, Sutherland P., Doble M., Wadhams P. (2016). Ocean waves across the Arctic : attenuation due to dissipation dominates over scattering for periods longer than 19 s. Geophysical Research Letters, 43 (11), p. 5775-5783. ISSN 0094-8276.

Titre du document
Ocean waves across the Arctic : attenuation due to dissipation dominates over scattering for periods longer than 19 s
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000379851800028
Auteurs
Ardhuin Fabrice, Sutherland P., Doble M., Wadhams P.
Source
Geophysical Research Letters, 2016, 43 (11), p. 5775-5783 ISSN 0094-8276
The poorly understood attenuation of surface waves in sea ice is generally attributed to the combination of scattering and dissipation. Scattering and dissipation have very different effects on the directional and temporal distribution of wave energy, making it possible to better understand their relative importance by analysis of swell directional spreading and arrival times. Here we compare results of a spectral wave modelusing adjustable scattering and dissipation attenuation formulationswith wave measurements far inside the ice pack. In this case, scattering plays a negligible role in the attenuation of long swells. Specifically, scattering-dominated attenuation would produce directional wave spectra much broader than the ones recorded, and swell events arriving later and lasting much longer than observed. Details of the dissipation process remain uncertain. Average dissipation rates are consistent with creep effects but are 12 times those expected for a laminar boundary layer under a smooth solid ice plate.
Plan de classement
Limnologie physique / Océanographie physique [032]
Description Géographique
ARCTIQUE
Localisation
Fonds IRD
Identifiant IRD
PAR00014893
Contact