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Analysis and interpretation of frequency-wavenumber spectra of young wind wavesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 января 2016 г.
- Авторы: Leckler F., Ardhuin F., Benetazzo A., Bergamasco F., Peureux C., Dulov V.
- Журнал: Journal of Physical Oceanography
- Том: 45
- Номер: 10
- Год издания: 2015
- Издательство: American Meteorological Society
- Местоположение издательства: United States
- Первая страница: 2484
- Последняя страница: 2496
- DOI: 10.1175/JPO-D-14-0237.1
- Аннотация: The energy level and its directional distribution are key observations for understanding the energy balance in the wind-wave spectrum between wind-wave generation, nonlinear interactions, and dissipation. Here, properties of gravity waves are investigated from a fixed platform in the Black Sea, equipped with a stereo video system that resolves waves with frequency f up to 1.4Hz and wavelengths from 0.6 to 11m. One representative record is analyzed, corresponding to young wind waves with a peak frequency fp = 0.33Hz and a wind speed of 13m/s. These measurements allow for a separation of the linear waves from the bound second-order harmonics. These harmonics are negligible for frequencies f up to 3 times fp but account formost of the energy at higher frequencies.The full spectrum is well described by a combination of linear components and the second-order spectrum. In the range 2fp to 4fp, the full frequency spectrum decays like f^5, which means a steeper decay of the linear spectrum.The directional spectrum exhibits a very pronounced bimodal distribution, with two peaks on either side of the wind direction, separated by 150grad at 4fp. This large separation is associated with a significant amount of energy traveling in opposite directions and thus sources of underwater acoustic and seismic noise. The magnitude of these sources can be quantified by the overlap integral I( f ), which is found to increase sharply from less than 0.01 at f=2fp to 0.11 at f=4fp and possibly up to 0.2 at f=5fp, close to the 0.5pi value proposed in previous studies
- Добавил в систему: Дулов Владимир Александрович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Leckler_2015_jpo-d-14-0237.1.pdf | 2,6 МБ | 8 января 2016 [VADulov] |