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Analyses of zonal atmospheric excitation functions and their correlation with polar motion excitation functions [PDF]
Annales Geophysicae, 1997 The atmospheric influence on the Earth's, rotation can be described by the effective atmospheric angular momentum (EAAM) functions. In this study we focus on the analysis of short period variations of the equatorial components of the zonal EAAM ...
J. Nastula, W. Kosek, B. Kolaczek
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Assimilation of Earth rotation parameters into a global ocean model: excitation of polar motion [PDF]
Nonlinear Processes in Geophysics, 2011 The oceanic contribution to Earth rotation anomalies can be manifold. Possible causes are a change of total ocean mass, changes in current speed or location and changes in mass distribution.
J. Saynisch, M. Wenzel, J. Schröter
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Reducing filter effects in GRACE-derived polar motion excitations [PDF]
Earth, Planets and Space, 2019 Polar motion is caused by mass redistribution and motion within the Earth system. The GRACE (Gravity Recovery and Climate Experiment) satellite mission observed variations of the Earth’s gravity field which are caused by mass redistribution.
Franziska Göttl +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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Geodetic residual time series: A combined series by minimization of their internal noise level
Frontiers in Earth Science, 2023 This study aims to assess the hydrological effects of polar motion calculated from different combinations of geophysical excitations at decadal, seasonal, and non-seasonal periods.
Małgorzata Wińska
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Short periodic variations of polar motion and hemispheric atmospheric angular momentum excitation functions in the period 1984-1992 [PDF]
Annales Geophysicae, 1995 Short periodic oscillations with the periods from 10 up to 110 days of the hemispheric components of effective atmospheric angular momentum (EAAM) excitation function and their correlation with polar motion excitation function have been analyzed.
J. Nastula
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Excitation of Mars polar motion [PDF]
Astronomy & Astrophysics, 2006 In this paper, computations of Mars' polar motion are presented for Mars models with three homogeneous layers as a function of the radius of the inner core and for different excitation possibilities (atmosphere, ice caps, quakes). We estimated the amplitude of the two polar motion normal modes, i.e.
Dehant, Véronique +3 more
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Earth, Planets and Space, 2021 Increasing ice loss of the Antarctic Ice Sheet (AIS) due to global climate change affects the orientation of the Earth’s spin axis with respect to an Earth-fixed reference system (polar motion).
Franziska Göttl +4 more
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Remote Sensing, 2020 Over the last 15 years, the Gravity Recovery and Climate Experiment (GRACE) mission has provided measurements of temporal changes in mass redistribution at and within the Earth that affect polar motion. The newest generation of GRACE temporal models, are
Justyna Śliwińska +3 more
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Remote Sensing, 2021 Similar to seasonal and intraseasonal variations in polar motion (PM), interannual variations are also largely caused by changes in the angular momentum of the Earth’s geophysical fluid layers composed of the atmosphere, the oceans, and in-land ...
Małgorzata Wińska
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