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| Titel |
Investigation on empirical estimation of minor tides |
| VerfasserIn |
Wolfgang Bosch, Matthias Madzak, Jan Hagedorn, Harald Schuh, Sigrid Böhm |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094592
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| Publikation (Nr.) |
 EGU/EGU2014-10012.pdf |
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| Zusammenfassung |
| In general recent global ocean tide models provide tidal constants for the most dominant
semi-diurnal, diurnal, selected shallow water and some long period tides, typically M2, N2,
N2 , K2, 2N2, O1 , P1 , Q1 , K1, S1, M4, Mf and Mm. Contributions of minor tidal terms and
modulations of the main terms are in general considered by inferring admittance assumptions
and nodal corrections. The rather new hydrodynamic model FES2012 extends this list and
now provides additional tables for tidal constants for some 18 complementary minor tides.
We investigate here if the long time series of precise multi-mission altimeter data (e.g. on
the repeated ground tracks of TOPEX/Jason1/Jason2) allows a robust empirical
estimation of those minor tides which appear to be (after the major tides listed above)
the next dominant tidal waves. Candidate minor tidal waves are M1, J1, Ïă1, ν2,
L2, T2, μ2. Can these partial tides empirically separated from tides with adjacent
frequencies (e.g. μ2 versus 2N2 or T2 versus S2)? How do the tidal constant for those
minor tides compare with those of the hydrodynamic model FES2012? What are the
quantitative differences between applying admittance theory and using the tidal
constants derived empirically? These investigations are performed in the context of the
SPOT-project, aiming to improve the transfer function from ocean tide angular
momentum to Earth rotation parameters, the variations of polar motion and LOD. |
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