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Coastal Ocean Tide Modeling Using Multiple Satellite Altimetry

Yu Wang(1) , C. K. Shum(1) , Yuchan Yi(1) , Koji Matsumoto(2) , Yoshihiro Niwa(3) , Yi Chao(4) , and Xiaochun Wang(4)

(1) Laboratory for Space Geodesy and Remote Sensing, The Ohio State University, Columbus, Ohio, 43210, United States
(2) Division of Earth Rotation, National Astronomical Observatory, Mizusawa 023-0861, Japan
(3) Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan
(4) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States

Abstract

Due primarily to the availability of TOPEX/POSEIDON (T/P) satellite altimetry, and advances in numerical modeling methodologies, semidiurnal and diurnal barotropic ocean tides are known in deep ocean (depth>1000m) to within 2 cm rms and with a spatial resolution longer than 50 km. Tides are much less well known in the coastal regions, over continental shelves and in polar oceans, due primarily to limited observations, inadequate spatial resolutions and complicated spectra caused by non-linear hydrodynamics, including internal or baroclinic tides. Poor knowledge of coastal tides is also a primary limitation for nowcast or forecast coastal or shallow shelf circulations. We report our progress to use multiple satellite altimetry, including JASON-1, T/P, ERS-1, ERS-2, ENVISAT and GFO, to determine barotropic ocean tide models in the coastal regions, including Yellow Sea, East China Sea, Sea of Japan, Patagonia, Indonesian Sea, Atlantic Canadian Shelf and Hudson Bay. Both along track SSH anomaly data and SSH anomaly data at single or dual satellite crossover locations are generated from satellite altimetry stackfiles and used in empirical tide modeling, with the next step to use these point solutions for assimilated modeling. We compare the barotropic tide solutions and the Tokyo University internal tidal prediction with other solutions and with an assimilated solution which generates both barotropic and baroclinic tides in the NW US coastal ocean.

 

Workshop presentation

 

                 Last modified: 07.10.03