Share Email Print
cover

Proceedings Paper

Laboratory investigation of wind wave breaking modulation in the inhomogeneous current field
Author(s): Victor Bakhanov; Nikolai Bogatov; Alexei Ermoshkin; Olga Kemarskaya
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A experimental laboratory study of the effect of a horizontally inhomogeneous current on breaking statistics of wind waves was carried out. Were creating a current having the same direction as wind waves with positive and negative gradients and a current of the counter direction with a negative gradient. The wind speed varied from 10.4 to 20.1 m/s based on a standard height of 10 m. The maximum current velocity near the surface was 27 cm/s. The maximum current gradient was equal to 0.09 1/s. The codirected current reduces the wind wave amplitude for all wind speeds, while the frequency of the spectral density maximum of wind waves remains the same. The frequency of the recorded by radar wind-wave breaking also decreases for positive, negative, and zero gradients. In the case of counter directions, for light winds in the presence of a current the wind wave amplitude reduces, the wind wave spectrum displaces in the direction of lower frequencies. At higher wind speeds, there were neither differences in the surface wave spectra in the presence and absence of a current, however, an increase in the frequency of the recorded by radar wind-wave breaking is observed. These laboratory investigations are carried out in the interests of the remote diagnostics methods development of inhomogeneous currents at higher wind speeds.

Paper Details

Date Published: 14 October 2015
PDF: 15 pages
Proc. SPIE 9638, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2015, 963810 (14 October 2015); doi: 10.1117/12.2195138
Show Author Affiliations
Victor Bakhanov, Institute of Applied Physics of the RAS (Russian Federation)
Nikolai Bogatov, Institute of Applied Physics of the RAS (Russian Federation)
Alexei Ermoshkin, Institute of Applied Physics of the RAS (Russian Federation)
Olga Kemarskaya, Institute of Applied Physics of the RAS (Russian Federation)


Published in SPIE Proceedings Vol. 9638:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2015
Charles R. Bostater; Stelios P. Mertikas; Xavier Neyt, Editor(s)

© SPIE. Terms of Use
Back to Top