Excitation of the Earth's Chandler wobble by a turbulent oceanic double-gyre

Article

Naghibi, E., Jalali, MA, Karabasov, S. A. and Alam, M., -R. 2017. Excitation of the Earth's Chandler wobble by a turbulent oceanic double-gyre. Geophysical Journal International. 209 (1), p. 509–516. https://doi.org/10.1093/gji/ggx032
AuthorsNaghibi, E., Jalali, MA, Karabasov, S. A. and Alam, M., -R.
Abstract

We develop a layer-averaged, multiple-scale spectral ocean model and show how an oceanic double-gyre can communicate with the Earth's Chandler wobble. The overall transfers of energy and angular momentum from the double-gyre to the Chandler wobble are used to calibrate the turbulence parameters of the layer-averaged model. Our model is tested against a multilayer quasi-geostrophic ocean model in turbulent regime, and base states used in parameter identification are obtained from mesoscale eddy resolving numerical simulations. The Chandler wobble excitation function obtained from the model predicts a small role of North Atlantic ocean region on the wobble dynamics as compared to all oceans, in agreement with the existing observations.

KeywordsEarth rotation variations; Loading of the Earth; Atlantic Ocean; Fourier Analysis; Non-linear differential equations; Numerical modelling
JournalGeophysical Journal International
Journal citation209 (1), p. 509–516
ISSN1365-246X
Year2017
PublisherOxford University Press on behalf of The Royal Astronomical Society
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Anyone
Digital Object Identifier (DOI)https://doi.org/10.1093/gji/ggx032
Web address (URL)https://academic.oup.com/gji/article/209/1/509/2957021
Publication dates
Print25 Jan 2017
Publication process dates
Accepted23 Jan 2017
Deposited05 Jun 2023
Copyright holder© 2017, The Author(s)
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