Formula for the Chandler Period (Free Wobble of Planetary Bodies)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10508362" target="_blank" >RIV/00216208:11320/25:10508362 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=tyt_vvR-r9" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=tyt_vvR-r9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024GL112997" target="_blank" >10.1029/2024GL112997</a>
Alternative languages
Result language
angličtina
Original language name
Formula for the Chandler Period (Free Wobble of Planetary Bodies)
Original language description
If the rotational equilibrium of a planetary body is disturbed, the rotation pole responds with a cyclical motion. The duration of one cycle is referred to as the Chandler period, and, when viewed from space, the body wobbles. Because planets are not rigid, the wobble period differs from the Euler period by the factor 1-kX/kf $left(1-{k}_{mathrm{X}}/{k}_{mathrm{f}}right)$, where kX/kf ${k}_{mathrm{X}}/{k}_{mathrm{f}}$ is a ratio of two Love numbers. Here, we perform numerical simulations in which viscoelastic deformation of the planet and the Liouville equation hence polar motion are self-consistently coupled. We show that kX ${k}_{mathrm{X}}$ is not the Love number at the frequency of the Chandler wobble itself, as is commonly assumed, but rather that it is close to ke ${k}_{mathrm{e}}$, the elastic Love number. This result is important when the Chandler periods of Earth and Mars are interpreted, because the measured frequency is related to the internal rheological structure in a different way than previously thought.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GA22-20388S" target="_blank" >GA22-20388S: Evolving Ice Shells - processes shaping planetary ice shells inferred from numerical modelling</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
1944-8007
Volume of the periodical
52
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
e2024GL112997
UT code for WoS article
001464675800001
EID of the result in the Scopus database
2-s2.0-105002585498