Letter: Ocean bathymetry reconstruction from surface data using hydraulics theory

Physics of Fluids - Tập 30 Số 12 - 2018
Subhajit Kar1, Anirban Guha1
1Environmental and Geophysical Fluids Group, Department of Mechanical Engineering, Indian Institute of Technology Kanpur , Kanpur, U.P. 208016, India

Tóm tắt

Here we propose a technique that successfully reconstructs ocean bathymetry from the free surface velocity and elevation data. This technique is based on the principles of open-channel hydraulics, according to which a sub-critical flow over a seamount creates a free surface dip. The proposed method recognizes that such a free surface dip contains the signature of the bottom topography, hence inverts the free surface to reconstruct the topography accurately. We applied our inversion technique on re-analysis data and reconstructed the Mediterranean Sea and the Red Sea bathymetries of 1/12° resolution with approximately 90% accuracy.

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Physics of Fluids

Tập 30 Số 12

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