Results 21 to 30 of about 1,852,127 (286)
The atmospheric excitation of rapid polar motions [PDF]
Symposium - International Astronomical Union, 1988 Analysis of data from new, highly accurate, geodetic techniques reveals rapid polar motions. Comparison of the new geodetic data and meteorological excitation estimates shows that the observed rapid polar motions are correlated with atmospheric pressure changes, and that these changes are related to atmospheric normal modes.
T. M. Eubanks +2 more
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Earth, Planets and Space, 2021 In geodesy, a key application of data from the Gravity Recovery and Climate Experiment (GRACE), GRACE Follow-On (GRACE-FO), and Satellite Laser Ranging (SLR) is an interpretation of changes in polar motion excitation due to variations in the Earth’s ...
Justyna Śliwińska +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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Atmospheric excitation of polar motion [PDF]
, 1996 Analysis of nonseasonal polar motion excitation and atmospheric mass equatorial angular momentum (EAM) over land for the period 1980-1993 reveals a clear pattern of high power and correlation during the northern hemisphere (NH) winter followed by low ...
Kuehne, John William, 1960-
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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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Remote Sensing, 2022 Observations from the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) missions can be used to estimate gravimetric excitation of polar motion (PM), which reflects the contribution of mass changes in continental hydrosphere ...
Justyna Śliwińska +2 more
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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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Geodesy and Geodynamics, 2017 At seasonal and intraseasonal time scales, polar motions are mainly excited by angular momentum fluctuations due to mass redistributions and relative motions in the atmosphere, oceans, and continental water, snow, and ice, which are usually provided by ...
Wei Chen +3 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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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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