Tides in the Tongan Region of the Pacific Ocean
作者:
John L. Luick, R. Falconer Henry,
期刊:
Marine Geodesy
(Taylor Available online 2000)
卷期:
Volume 23,
issue 1
页码: 17-29
ISSN:0149-0419
年代: 2000
DOI:10.1080/014904100273324
出版商: Informa UK Ltd
数据来源: Taylor
摘要:
Tidal levels and currents in the Tongan region of the Pacific were simulated using a two-dimensional frequency-domain finite element model. The eight major diurnal and semidiurnal tidal constituents were modeled successfully, using open boundary conditions taken from a global tidal model based on the Topex/Poseidon satellite altimeter. Comparison of model results with observations from the single tide gauge site in the area were later used to adjust the boundary conditions. The validity of omitting horizontal eddy viscosity from the finite element model was checked by running an equivalent finite difference model. The results show that although the submarine Tongan ridge does not appear to trap tidal energy, there are residual tidal currents and possible recirculations which are capable of influencing biological productivity around Tonga. The model results are reduced to a simple method for predicting tidal heights in outlying areas, based only on the tidal calendar for the capital, Nuku'alofa.
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