Directional short wind wave spectra derived from the sea surface photography

New field measurements of 2‐D wave number short wind wave spectra in the wavelength range from few millimeters to few decimeters are reported and discussed. The measurement method is based on stereophotography and image brightness contrast processing. As found, the spectra of decimeter waves are alm...

Full description

Saved in:
Bibliographic Details
Published in:Journal of geophysical research. Oceans 2013-09, Vol.118 (9), p.4380-4394
Main Authors: Yurovskaya, M. V., Dulov, V. A., Chapron, B., Kudryavtsev, V. N.
Format: Article
Language:English
Subjects:
Anisotropy
Capillary waves
Decimeter waves
field measurements
Geophysics
gravity-capillary waves
image processing
In situ measurement
Marine
Measurement methods
Meteorology
Radar
Radar data
Sciences of the Universe
Spectra
spectrum modeling
Stereophotography
wave directional spectrum
Wavelengths
Wavenumber
Wind speed
Wind waves
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:New field measurements of 2‐D wave number short wind wave spectra in the wavelength range from few millimeters to few decimeters are reported and discussed. The measurement method is based on stereophotography and image brightness contrast processing. As found, the spectra of decimeter waves are almost isotropic and weakly dependent on the wind speed. Both directional anisotropy and wind sensitivity rapidly increase at wave numbers larger than 100 rad/m. These aspects are consistent with other previously reported optical and radar data. Following these new in situ measurements, a revision of a semiempirical model of short wind wave spectrum is suggested. This revised model can readily be implemented in other studies (radar scattering, air‐sea interaction issues) where detailed knowledge of short wind wave spectra is crucial. Key Points New field measurements of 2D wavenumber short wind wave spectra are presented Capillary waves are anisotropic and wind dependent, decimeter waves are not On the basis of the data, a revision of existing spectrum model is performed
ISSN:2169-9275
2169-9291
DOI:10.1002/jgrc.20296