Results 21 to 30 of about 12,498 (259)
Coseismic Excitation of the Earth’s Polar Motion [PDF]
International Astronomical Union Colloquium, 2000 AbstractApart from the “shaking” near the epicenter that is the earthquake, a seismic event creates a permanent field of dislocation in the entire Earth. This redistribution of mass changes (slightly) the Earth’s inertia tensor; and the Earth’s rotation will change in accordance with the conservation of angular momentum.
B.F. Chao, R.S. Gross
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Atmospheric Excitation of Polar Motion [PDF]
International Astronomical Union Colloquium, 2000 AbstractVariations in the angular momentum of the atmosphere in the equatorial plane due to shifts in air mass distribution and changing winds impact the orientation of Earth so that motions of the pole occur on a broad range of time scales. The wind terms have notable diurnal fluctuations, which appear as a tidal signature. Subseasonal fluctuations of
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Research on Earth rotation and geodynamics in Poland in 2015–2018 [PDF]
Geodesy and Cartography, 2019 This paper summarizes the activity of the chosen Polish geodetic research teams in 2015–2018 in the fields of Earth: rotation, dynamics as well as magnetic field.
Janusz Bogusz +2 more
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Comment [on “Polar motions excited by a convecting viscous mantle”] [PDF]
Geophysical Research Letters, 1993 Abstract In the last few years there has been a renewed interest in the problem of true polar wander (TPW) induced by slowly varying mass redistribution. Moser et al.,(1992) disagrees with our own results, Ricard et. al.(1992) on three different points:(1) The amplitude of the non-diagonal inertia perturbations that should be considered;(2) The ...
Y. Ricard, R. Sabadini, SPADA, GIORGIO
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Remote Sensing, 2019 This study evaluates the gravity field solutions based on high-low satellite-to-satellite tracking (hl-SST) of low-Earth-orbit (LEO) satellites: GRACE, Swarm, TerraSAR-X, TanDEM-X, MetOp-A, MetOp-B, and Jason 2, by converting them into hydrological polar
Justyna Śliwińska, Jolanta Nastula
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Polar motion of the triaxial nonrigid Earth and atmospheric excitation [PDF]
Geo-spatial Information Science, 2011 The present study aims to extend the traditional rotation theory of the rotational-symmetric Earth to the triaxial Earth. We re-formulate the Liouville equations and their general solutions for the triaxial nonrigid Earth and find that the traditional theory introduces some theoretical errors in modeling the excitation functions.
Wei Chen, Wenbin Shen
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Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models
Earth, Planets and Space, 2018 The new Release-06 (RL06) Gravity Recovery and Climate Experiment (GRACE) gravity field solutions are evaluated by converting them into equatorial effective angular momentum functions (so-called excitation functions) for polar motion and comparing these ...
Franziska Göttl +2 more
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Hydrological Excitation of Polar Motion Derived from GRACE Gravity Field Solutions
International Journal of Geophysics, 2011 The influence of the continental water storage on the polar motion is not well known. Different models have been developed to evaluate these effects and compared to geodetic observations.
L. Seoane +3 more
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Chaotic oceanic excitation of low-frequency polar motion variability [PDF]
Earth System DynamicsStudies of Earth rotation variations generally assume that changes in non-tidal oceanic angular momentum (OAM) manifest the ocean's direct response to atmospheric forces.
L. Börger +7 more
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Polar ionospheric responses to solar wind IMF changes [PDF]
Annales Geophysicae, 2000 Auroral and airglow emissions over Eureka (89° CGM) during the 1997-98 winter show striking variations in relation to solar wind IMF changes. The period January 19 to 22, 1998, was chosen for detailed study, as the IMF was particularly strong and ...
Y. Zhang +8 more
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