Oceanic tides over the Newfoundland and Scotian Shelves from TOPEX/POSEIDON altimetry |
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| Authors: | Guoqi Han Moto Ikeda Peter C Smith |
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| Institution: | 1. Atlantic Centre for Remote Sensing of the Oceans , Bedford, N.S., Canada , B4A 1E6;2. Department of Fisheries and Oceans , Bedford Institute of Oceanography , P.O. Box 1006, Dartmouth, N.S., Canada , B2Y 4A2;3. Graduate School of Environmental Earth Sciences , Hokkaido University , Sapporo, Japan;4. Department of Fisheries and Oceans , Bedford Institute of Oceanography , Dartmouth, N.S. |
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| Abstract: | Abstract A modified response analysis in the form of an orthotide parametrization is used to derive major semi‐diurnal and diurnal tidal constituents over the Newfoundland and Scotian Shelves from TOPEX/POSEIDON altimeter data. The orthotide formulation simultaneously solves for eight major semi‐diurnal and diurnal constituents, and has an accuracy of better than ～1.5 cm for each constituent. Tidal elevations are derived from the altimeter data on the ascending and descending satellite ground tracks, and interpolated using the method of statistical interpolation. The semi‐diurnal constituents (M2, S2 and N2) compare favourably with available in‐situ observations and a numerical model. The diurnals (K1 and O1) are not as accurate as the semi‐diurnals, especially in the nearshore environment. The paper demonstrates the ability of TOPEX/POSEIDON altimetry to provide accurate tidal data over a continental shelf. |
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