Wind speed and wavelength dependence of radar backscatter variations due to ocean fronts and internal waves

Multifrequency SAR images of fronts and internal waves collected under moderately low wind speeds indicate that the wavelength dependence of such features is contrary to the predictions of models that take into account only Bragg wave interactions with surface currents. Observations under very low wind speeds also show features that are inconsistent with simple Bragg model predictions. These observations are reviewed, and some hypotheses regarding the effects of finite amplitude intermediate-scale waves are discussed.