|
Read Full Article (file size: 2257766 bytes) Cited by
GEOPHYSICAL RESEARCH LETTERS,
VOL. 30, NO. 17,
1907,
doi:10.1029/2003GL017676,
2003
Semi-diurnal and diurnal tidal dissipation from TOPEX/Poseidon altimetry
Gary D. Egbert
College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, USA
Richard D. Ray
NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
Abstract
Tidal energy dissipation is estimated for eight semi-diurnal and diurnal constituents using a global inverse solution constrained
by TOPEX/Poseidon altimeter data. Very similar spatial patterns are obtained for all semi-diurnal constituents, with about
one third of the total dissipation occurring in the deep ocean over rough topography. Maps for diurnal constituents are also
similar amongst themselves, but quite different from the semi-diurnal results. For diurnals a smaller fraction of dissipation,
roughly 10%, occurs in the deep ocean. Much of the difference can be explained by the very different spatial pattern of diurnal
and semi-diurnal tidal currents. The lack of free internal waves at frequencies poleward of 30° at diurnal frequencies also
probably plays a role, limiting the effectiveness of baroclinic conversion as an energy sink for barotropic diurnal tides.
Received 2
May
2003;
accepted 29
July
2003;
published 12
September
2003.
Index Terms: 4560 Oceanography: Physical: Surface waves and tides (1255); 1255 Geodesy and Gravity: Tides—ocean (4560); 4544 Oceanography: Physical: Internal and inertial waves.
Read Full Article (file size: 2257766 bytes) Cited by
Citation: Egbert, G. D., and R. D. Ray
(2003),
Semi-diurnal and diurnal tidal dissipation from TOPEX/Poseidon altimetry,
Geophys. Res. Lett.,
30(17),
1907,
doi:10.1029/2003GL017676.
Copyright 2003 by the American Geophysical Union.
|