Tuesday, 10 July 2012: 3:45 PM
Essex North (Westin Copley Place)
Surface gravity waves in the deep ocean in large part influence the transfer of scalar (heat, gas, moisture) and vector (momentum) quantities through the air-sea interface. In order to accurately estimate these fluxes, we must first achieve a more robust understanding of the physical processes that drive them. Images from three high resolution digital video cameras deployed on R/P FlIP during the HIRES experiment in June 2010 are analyzed to obtain a dense record of surface elevation in space and time. Variable wind-wave fields, paired with simultaneous measurements (e.g. wind speed, large- scale wave field, surface currents, air-sea flux) from instruments deployed on FLIP provide an unprecedented opportunity to better understand wind-wave processes over many scales. This work focuses on quantifying the properties of small scale surface gravity waves (20cm-150cm) as they are forced by changing environmental conditions and as they interact with larger waves. Frequency and wavenumber spectra are presented for varying wind conditions (0-25 m/s). Results are presented on the response of the small waves to environmental conditions. The modulation of the small-scale wave field by larger scale waves is also examined.
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