Results 31 to 40 of about 201 (152)
Comments on the Chandler wobble Q [PDF]
Geophysical Journal International, 1979 Summary. The Chandler wobble Q, as obtained from the astronomical data cannot be equated with the Q, of the source of damping, as an examination of Chandler wobble energetics reveals. We find that if dissipation occurs in the mantle then Q, = 9 Q,, implying that either the mantle Q is frequency dependent or the wobble Q is much larger than 100.
J. B. Merriam, K. Lambeck
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the excitation of the Chandler wobble [PDF]
Geophysical Research Letters, 2000 The Chandler wobble is an excited resonance of the Earth's rotation having a period of about 14 months. Although it has been under investigation for more than a century, its excitation mechanism has remained elusive. Here, the angular momentum of the atmosphere computed from the products of a numerical weather prediction analysis system and the angular
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Research on Polar Motion Prediction Accuracy Based on ETH and GFZ Angular Momentum Forecast Products
Earth and Space Science, Volume 13, Issue 5, May 2026.Abstract Polar motion (PM), a critical element of Earth Orientation Parameters (EOP), is essential for high‐precision applications such as deep space exploration and satellite navigation. Recent advances in prediction methods utilizing Effective Angular Momentum (EAM) data have become a key pathway for enhancing PM forecast accuracy.
Xishun Li +10 more
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Numerical solutions of rotational normal modes of a triaxial two-layered anelastic Earth
Geodesy and Geodynamics, 2019 The Earth's rotational normal modes depend on Earth model used, including the layer structures, principal inertia moments of different layers and the compliances.
Wenbin Shen +3 more
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Period and Qw of The Chandler Wobble [PDF]
Geophysical Journal International, 1974 A splined ILS/IPMS data set (1900–1973) from the most homogeneous values available has been analysed by the maximum entropy method of Burg. Principal conclusions are: (1) the spectral character of the Chandler wobble is a single broad peak, (2) the period is 432·95 ± 1·02 mean solar days and, (3) the Qw is 36±10.
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ENSO Modulates the Oceanic Excitation of Polar Motion
Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.Abstract The El Niño–Southern Oscillation (ENSO) exerts a strong control on interannual length‐of‐day variations, but its imprint on polar motion excitation remains to be identified. We explore the hypothesis that part of this imprint is embedded in oceanic angular momentum (OAM) changes, particularly that component driven by ocean bottom pressure pb $\
L. Börger +3 more
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Research on Polar Motion Prediction Based on Radial Basis Function Neural Network Interpolation
Earth and Space Science, Volume 12, Issue 9, September 2025.Abstract Accurate prediction of polar motion are crucial for various scientific fields, including astronomy, geoscience, and oceanography. The temporal resolution of the modeling data currently utilized in polar motion prediction research is 1 day. This paper proposes to use multiple interpolation methods to interpolate the polar motion observation ...
Fei Wu +3 more
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Fine Detection of Transient Signals in GNSS Time Series Using Multi‐Station Hankel Spectrum Analysis
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.Abstract Fine detection of micro‐transient deformations exhibiting diverse spatiotemporal patterns is crucial for unraveling geophysical processes in geodetic data sets, despite the challenges posed by high noise levels and correlated periodic signals.
Kunpeng Shi +5 more
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Earth, Planets and SpaceThe clear ~ 6-year beat in the polar motion data has allowed us to consider the Chandler period (P) as ~ 1.2 years, albeit approximately, from solely the observed polar motion data.
Ryuji Yamaguchi, Masato Furuya
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Climate‐Induced Polar Motion: 1900–2100
Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.Abstract It has been demonstrated that the motion of the Earth's rotational pole with respect to the crust—termed polar motion—is increasingly influenced by barystatic processes, that is, continental‐ocean mass redistribution due to melting of polar ice sheets, global glaciers, and variations in terrestrial water storage.
Mostafa Kiani Shahvandi, Benedikt Soja
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