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| Titel |
Voluntary Observing Ship (VOS) data as an experimental background of wind-sea studies |
| VerfasserIn |
V. Grigorieva, S. Badulin, S. Gulev |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250066287
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| Zusammenfassung |
| The global visual wave observations (VOS) are re-analyzed within the theoretical concept of self-similar wind-driven seas (1). The core of the analysis is one-parametric dependencies of wave height on wave period. Theoretically, wind-driven seas are governed by power-like laws with exponents close to Toba's one 3/2 while the corresponding swell exponent (-1/2) has an opposite signature. This simple criterion was used and appeared to be adequate to the problem of swell-wind sea discrimination. This discrimination does not follow exactly the VOS data. This important issue is considered both in the context of methodology of obtaining VOS data and within the physics of the mixed sea. The results are detailed for the areas which wave climatology based on VOS data is well studied and the swell component is well pronounced (2). Prospects of further study are discussed. In particular, satellite data are seen to be promising for tracking ocean swell and for studies of physical mechanisms of its evolution.
The work was supported by the Russian government contracts 11.G34.31.0035 (signed 25 November 2010) and 11.G34.31.0007, Russian Foundation for Basic Research grant 11-05-01114-a and ONR grant N000141010991. Authors gratefully acknowledge continuing support of these foundations.
References
[1] S. I. Badulin, A. V. Babanin, D. Resio, and V. Zakharov. Weakly turbulent laws of wind-wave growth. J. Fluid Mech., 591:339-378, 2007.
[2] S. K. Gulev and V. G. Grigorieva. Variability of the winter wind waves and swell in the north Atlantic and north Pacific as revealed by the voluntary observing ship data. Journal of Climate, 19:56675685, 2006. |
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