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Energy budget of the Tidal Hydrodynamic Model FES94.1
Author(s) -
Lyard Florent H.,
Le Provost Christian
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00498
Subject(s) - thermohaline circulation , ocean heat content , oceanography , energy budget , ocean current , geology , north atlantic deep water , ocean dynamics , oceanic basin , climatology , forcing (mathematics) , dissipation , ocean surface topography , continental shelf , physical oceanography , marine energy , the arctic , energy (signal processing) , physics , structural basin , quantum mechanics , thermodynamics , paleontology
This paper presents a detailed energy budget of the M 2 tide over the world ocean, based on the hydrodynamic solution FES94.1. The global energy input by the astronomical forcing, deduced from the (2,2) spherical harmonics of the M 2 FES94.1 solution, is 2.35 TW. A quarter of this input takes place over the South Atlantic Ocean. This energy is dissipated by bottom friction over the main continental shelves, among which 40% over the North Atlantic Ocean. The Pacific Ocean, the Indian Ocean and the South Atlantic Ocean receive more energy than they dissipate. By contrast the Atlantic Ocean and the Arctic Ocean show a large deficit, compensated by a net influx of energy coming from the other basins. One third of the total M 2 energy input by astronomical forcing over the world ocean flows northward through the Equatorial Atlantic. Detailed energy dissipation estimates are computed over the different areas of dissipation and compared to the previous estimates.