Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects

Tesis defendida el 24 de Abril de 2015 en la Universidad Complutense de Madrid.

Detalhes bibliográficos
Autor: Calvo García-Maroto, Marta
Formato: tesis doctoral
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/116033
Acesso em linha:http://hdl.handle.net/10261/116033
Access Level:acceso abierto
Palavra-chave:Spring gravimeters
Absolute gravimeters
Superconducting gravimeters
Earth's tides
Tidal potential of degree 3
Long-period tides
Time stability
Instrumental drift
Calibration
Rotational normal modes
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spelling Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effectsCalvo García-Maroto, MartaSpring gravimetersAbsolute gravimetersSuperconducting gravimetersEarth's tidesTidal potential of degree 3Long-period tidesTime stabilityInstrumental driftCalibrationRotational normal modesTesis defendida el 24 de Abril de 2015 en la Universidad Complutense de Madrid.Temporal gravity variation measurements have been a long historical tradition in Central Europe, with some stations recording for decades. From the 80s, time varying gravity is permanently recorded at the Earth’s surface by a worldwide network of superconducting relative gravimeters within the Global Geodynamics Project of the International Association of Geodesy. In one of these stations, located in Strasbourg since the 1970s, the three main gravimeter types (relative spring gravimeter, relative superconducting gravimeter, and absolute gravimeter) have been set up. We use all these series to review the instrumental betterments. Studying the different improvements on gravimeters in the last years, mainly in terms of long term stability and instrumental drift, we show that the superconducting gravimeters can uniquely contribute to the study of the low frequency Earth's tides and small amplitudes waves. Also, the stability of the scale factor of the superconducting gravimeters is studied with the help of numerous calibration experiments carried out by collocated absolute measurements at Strasbourg Observatory. Finally, after estimating the values of the Free Core Nutation parameters, we search for the rotational normal mode called Free Inner Core Nutation (FICN), the gravity effect of which has never been observed before. For this purpose we develop a methodology to constrain the possible frequency range, through the detailed tidal analysis in the diurnal frequency band, using the 27-year superconducting gravity series recorded at J9 observatory, to separate small amplitude waves that have never been studied before, and which could be close enough to the frequency range of the FICN to be affected in terms of resonant amplitude. This work contributes to show the importance of not only the length, but also the quality of the data series to improve our knowledge of the Earth’s dynamics.Peer reviewedUniversidad Complutense de MadridUniversité de StrasbourgArnoso, JoséHinderer, JacquesConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152015info:eu-repo/semantics/doctoralThesishttp://purl.org/coar/resource_type/c_db06http://hdl.handle.net/10261/116033reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1160332026-05-22T06:33:51Z
dc.title.none.fl_str_mv Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
title Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
spellingShingle Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
Calvo García-Maroto, Marta
Spring gravimeters
Absolute gravimeters
Superconducting gravimeters
Earth's tides
Tidal potential of degree 3
Long-period tides
Time stability
Instrumental drift
Calibration
Rotational normal modes
title_short Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
title_full Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
title_fullStr Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
title_full_unstemmed Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
title_sort Analysis of long-term gravity records in Europe. Consequences for the retrieval of small amplitude and low frequency signals including the Earth's core resonance effects
dc.creator.none.fl_str_mv Calvo García-Maroto, Marta
author Calvo García-Maroto, Marta
author_facet Calvo García-Maroto, Marta
author_role author
dc.contributor.none.fl_str_mv Arnoso, José
Hinderer, Jacques
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Spring gravimeters
Absolute gravimeters
Superconducting gravimeters
Earth's tides
Tidal potential of degree 3
Long-period tides
Time stability
Instrumental drift
Calibration
Rotational normal modes
topic Spring gravimeters
Absolute gravimeters
Superconducting gravimeters
Earth's tides
Tidal potential of degree 3
Long-period tides
Time stability
Instrumental drift
Calibration
Rotational normal modes
description Tesis defendida el 24 de Abril de 2015 en la Universidad Complutense de Madrid.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
http://purl.org/coar/resource_type/c_db06
format doctoralThesis
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/116033
url http://hdl.handle.net/10261/116033
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidad Complutense de Madrid
Université de Strasbourg
publisher.none.fl_str_mv Universidad Complutense de Madrid
Université de Strasbourg
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869425446980943872
score 15,812455

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