Barotropic tides of the Southern Indian Ocean and the Amery Ice Shelf cavity
Article first published online: 21 SEP 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 18, September 2007
How to Cite
2007), Barotropic tides of the Southern Indian Ocean and the Amery Ice Shelf cavity, Geophys. Res. Lett., 34, L18602, doi:10.1029/2007GL030900., , , , and (
- Issue published online: 21 SEP 2007
- Article first published online: 21 SEP 2007
- Manuscript Accepted: 2 AUG 2007
- Manuscript Revised: 23 JUL 2007
- Manuscript Received: 8 JUN 2007
- Indian Ocean;
- Amery Ice Shelf;
- barotropic tides
 The 8 main tidal constituents were computed using a finite element, hydrodynamic ocean tide model over the South Indian Ocean region. The discretization of the domain is of the order of 100 km over the deep ocean and a few hundred meters near the coast. Such refinement in the grid resolution enables wave propagation and damping on the continental shelves to be solved correctly. The model used the GEBCO 1-minute global bathymetric grid which was improved with updated topographic data. The model solutions show good agreement with in-situ observations and Topex-Poseidon altimeter measurements and are significantly better than previously published solutions. We obtain a combined standard deviation of 1.4 cm for differences of our new regional model against independent observations compared to about 2.5 cm for the other tide models. The greatest improvements are found around the Kerguelen Islands, around Antarctica and beneath the Amery Ice Shelf and can be explained by the high grid resolution used and the particular attention given to the accuracy of the bathymetry in those regions.