All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 108 7 1
PDF Downloads 5 1 0

Generation of Unstable Modes of the Iceward-attenuating Swell by Ice Breeze

P. C. ChuDepartment of Geophysical Sciences, The University of Chicago, Chicago, IL 606637

Search for other papers by P. C. Chu in
Current site
Google Scholar
PubMed
Close
Full access

Abstract

A thermally forced surface wind (ice breeze) is introduced to Wadhams' model for investigating the effects of ice breeze of iceward-attenuating ocean waves. The wave solutions show that the ice breeze generates growing modes which have the same phase speed as Wadhams' model. The growth rate increases with augmentation of the mean surface temperature gradient and decreases with augmentation of ice thickness. In the frequency spectra, the growth rate has a single peak near 0.1 Hz. It is found that ice thickness affects the location of this peak in the frequency spectra. The thicker the ice, the lower the frequency where the peak is situated. The similarity of the frequency spectra between the growth rate and observed energy density implied that ice breeze may play some role in iceward-propagating waves.

Abstract

A thermally forced surface wind (ice breeze) is introduced to Wadhams' model for investigating the effects of ice breeze of iceward-attenuating ocean waves. The wave solutions show that the ice breeze generates growing modes which have the same phase speed as Wadhams' model. The growth rate increases with augmentation of the mean surface temperature gradient and decreases with augmentation of ice thickness. In the frequency spectra, the growth rate has a single peak near 0.1 Hz. It is found that ice thickness affects the location of this peak in the frequency spectra. The thicker the ice, the lower the frequency where the peak is situated. The similarity of the frequency spectra between the growth rate and observed energy density implied that ice breeze may play some role in iceward-propagating waves.

Save