Energetics of global ocean tides from Geosat altimetry
The present paper focuses on resonance and energetics of the daily tides, especially in the southern ocean, the distribution of gravitational power input of daily and half-daily tides, and comparison with other estimates of global dissipation rates. The present global tidal maps, derived from Geosat...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910068669 2023-05-15T18:24:57+02:00 Energetics of global ocean tides from Geosat altimetry Cartwright, David E. Ray, Richard D. Unclassified, Unlimited, Publicly available Sep 15, 1991 http://ntrs.nasa.gov/search.jsp?R=19910068669 unknown http://ntrs.nasa.gov/search.jsp?R=19910068669 Accession ID: 91A53292 Copyright Other Sources 48 Journal of Geophysical Research; 96; 16 1991 ftnasantrs 2012-02-15T19:07:04Z The present paper focuses on resonance and energetics of the daily tides, especially in the southern ocean, the distribution of gravitational power input of daily and half-daily tides, and comparison with other estimates of global dissipation rates. The present global tidal maps, derived from Geosat altimetry, compare favorably with ground truth data at about the same rms level as the models of Schwiderski (1983), and are slightly better in lunar than in solar tides. Diurnal admittances clearly show Kelvin wave structure in the southern ocean and confirm the resonant mode of Platzman (1984) at 28.5 + or - 0.1 hr with an apparent Q of about 4. Driving energy is found to enter dominantly in the North Pacific for the daily tides and is strongly peaked in the tropical oceans for the half-daily tides. Global rates of working on all major tide constituents except S2 agree well with independent results from analyses of gravity through satellite tracking. Comparison at S2 is improved by allowing for the air tide in gravitational results but suggests deficiencies in all solar tide models. Other/Unknown Material Southern Ocean NASA Technical Reports Server (NTRS) Pacific Southern Ocean |
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NASA Technical Reports Server (NTRS) |
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48 |
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48 Cartwright, David E. Ray, Richard D. Energetics of global ocean tides from Geosat altimetry |
topic_facet |
48 |
description |
The present paper focuses on resonance and energetics of the daily tides, especially in the southern ocean, the distribution of gravitational power input of daily and half-daily tides, and comparison with other estimates of global dissipation rates. The present global tidal maps, derived from Geosat altimetry, compare favorably with ground truth data at about the same rms level as the models of Schwiderski (1983), and are slightly better in lunar than in solar tides. Diurnal admittances clearly show Kelvin wave structure in the southern ocean and confirm the resonant mode of Platzman (1984) at 28.5 + or - 0.1 hr with an apparent Q of about 4. Driving energy is found to enter dominantly in the North Pacific for the daily tides and is strongly peaked in the tropical oceans for the half-daily tides. Global rates of working on all major tide constituents except S2 agree well with independent results from analyses of gravity through satellite tracking. Comparison at S2 is improved by allowing for the air tide in gravitational results but suggests deficiencies in all solar tide models. |
format |
Other/Unknown Material |
author |
Cartwright, David E. Ray, Richard D. |
author_facet |
Cartwright, David E. Ray, Richard D. |
author_sort |
Cartwright, David E. |
title |
Energetics of global ocean tides from Geosat altimetry |
title_short |
Energetics of global ocean tides from Geosat altimetry |
title_full |
Energetics of global ocean tides from Geosat altimetry |
title_fullStr |
Energetics of global ocean tides from Geosat altimetry |
title_full_unstemmed |
Energetics of global ocean tides from Geosat altimetry |
title_sort |
energetics of global ocean tides from geosat altimetry |
publishDate |
1991 |
url |
http://ntrs.nasa.gov/search.jsp?R=19910068669 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910068669 Accession ID: 91A53292 |
op_rights |
Copyright |
_version_ |
1766206016082411520 |