Graduate Thesis Or Dissertation

 

Estimating the in situ Stratification via Remotely-sensed Internal Wave Speeds Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/pv63g701k

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  • This work investigates a methodology for estimating the ocean stratification gradient based on high-resolution, in space and time, remote sensing observations of internal wave propagation speeds. The internal wave speed observations were collected using a shore-based, X-band marine radar and the ocean vertical density profiles were collected simultaneously from an in situ mooring array. An inverse model based on the linear internal wave dispersion relation assuming approximately uniform stratification is developed that allows the vertical density gradient to be expressed as a function of the internal wave phase speed, water depth, and background density. The inputs to the algorithm are the known cross-shore profile of water depth, the background density, and the remotely-sensed cross-shore profiles of internal wave speeds. A sensitivity analysis is conducted that demonstrates the influence of speed measurement errors on the estimated density gradients and the estimated vertical stratification gradients are compared against in situ measurements at a field site on the California inner shelf with very good agreement in deep water but more significant discrepancy in shallow water.
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