Skip to Main content Skip to Navigation
New interface
Theses

Modélisation de la rotation de la terre et analyse conjointe des données du mouvement du pôle et de gravimétrie

Abstract : The main goal of this work is to improve our understanding of the Earth’s rheology and of the Chandler wobble which depends on it. We compute the complex gravimetric factor at the Chandler frequency by a joint analysis of gravimetric and polar motion time series. We show the importance and the limits of gravimetric corrections for local analyses and the effectiveness of the combination of data from different stations. Using a more theoretical approach, we carry out an analytical and numerical study to determine the solutions of the small deformations of an anelastic homogeneous rotating Earth model. The influence of anelasticity on the Chandler wobble period and quality factoris studied and we show that the latter is more sensitive than the period to the rheological parameters, especially to the Kelvin’s viscosity. Finally, we study in Laplace domain the influence of the forcing frequency for the loading problem.
Complete list of metadata

Cited literature [231 references]  Display  Hide  Download

https://theses.hal.science/tel-01503377
Contributor : ABES STAR :  Contact
Submitted on : Friday, April 7, 2017 - 8:39:08 AM
Last modification on : Wednesday, November 3, 2021 - 9:17:00 AM
Long-term archiving on: : Saturday, July 8, 2017 - 12:30:17 PM

File

Ziegler_Yann_2016_ED413.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01503377, version 1

Collections

Citation

Yann Ziegler. Modélisation de la rotation de la terre et analyse conjointe des données du mouvement du pôle et de gravimétrie. Géophysique [physics.geo-ph]. Université de Strasbourg, 2016. Français. ⟨NNT : 2016STRAH006⟩. ⟨tel-01503377⟩

Share

Metrics

Record views

445

Files downloads

3057