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| Titel |
A high-frequency Earth rotation model based on empirical ocean tide models: re-examination of the corresponding Euler-Liouville equation |
| VerfasserIn |
Jan M. Hagedoorn, Matthias Madzak, Wolfgang Bosch, Sigrid Böhm, Harald Schuh |
| 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 |
250090609
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| Publikation (Nr.) |
 EGU/EGU2014-4866.pdf |
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| Zusammenfassung |
| Within the SPOT (Short Period Ocean Tidal variations in Earth rotation) project we want to
develop a new high-frequency Earth rotation model based on empirical ocean tide models. A
general overview of the project and the recent state is presented in (EGU Abstract Madzak
et al., 2014). The focus of this investigation is on the theoretical description, i.e.
the Euler-Liouville equation and the related effective angular momentum function
(EAMF). The conventional model is based on theory published nearly 20 years ago
(see Gross, GRL 20, 1993; Brzezinski, manus. geodae. 19, 1994). A special set of
coefficients, reflecting the considered elastic Earth model, the decoupling of the
Earth mantle from the liquid core, and the free-core nutation, is used since this
time.
In a first step, we re-examine the theoretical description by the Euler-Liouville equation,
the related EAMF and the applied simplification (linearisation etc.). Moreover, we investigate
the influence of the chosen Earth model parameters on the resulting Earth rotation parameters
within a realistic parameter space. Throughout the whole study the consistency of the applied
set of parameters is checked carefully. |
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