Hydrodynamic modulation of short wind-wave spectra by long waves and its measurement using microwave backscatter

Document Type

Article

Date of Original Version

1-1-1994

Abstract

This paper uses results of microwave backscattering experiments over the past decade to attempt to present a coherent picture of the ocean wave-radar modulation transfer function (MTF) based on composite surface theory, short-wave modulation, and modulated wind stress. A simplified relaxation model is proposed for the modulation of the gravity-capillary wavenumber spectrum by long waves. The model is based on the relaxation rate and the equilibrium gravity-capillary wavenumber spectrum. It differs from previous models by including all airflow modulation effects in the response of the equilibrium spectrum to changes in the airflow. By combining this new model of the hydrodynamic MTF with microwave measurements, the authors attempt to determine wind shear stress modulation caused by the long waves. -Authors

Publication Title, e.g., Journal

Journal of Geophysical Research

Volume

99

Issue

C5

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