Secular variation of Earth's gravitational harmonic J2 coefficient from Lageos and nontidal acceleration of Earth rotation

@article{Yoder1983SecularVO,
  title={Secular variation of Earth's gravitational harmonic J2 coefficient from Lageos and nontidal acceleration of Earth rotation},
  author={Charles Finney Yoder and J. G. Williams and Jean O. Dickey and Bob E. Schutz and R. J. Eanes and Byron D. Tapley},
  journal={Nature},
  year={1983},
  volume={303},
  pages={757-762}
}
Analysis of 5½ years of Lageos satellite range data reveal significant residual nodal signatures: an acceleration and annual and semiannual periods. These signatures primarily reflect variations in the zonal gravitational harmonic J2 coefficient and hence the polar moment of inertia. The implied decrease of \[Jdot]2=−3×10−11 yr−1 is consistent with both historical observations of the nontidal acceleration of the Earth's rotation and models of viscous rebound of the solid Earth from the decrease… 

Constraint on deep mantle viscosity from Lageos acceleration data

Recently reported analyses of 5½ yr of orbital data for the laser geodynamics satellite (Lageos) have revealed a residual acceleration in the node of its orbit in the amount −14.7±1.3 m arc s yr−2.

STEADY CHANGE IN FLATTENING OF THE EARTH: THE PRECESSION CONSTANT AND ITS LONG-TERM VARIATION

Variation in the second-degree zonal harmonic J2 of the Earth's gravitational potential is discussed and its impact on the coefficient H associated with the precession constant determined. The

Azimuthal dependence in the gravity field induced by recent and past cryospheric forcings

Present-day glacial activities and the current variability of the Antarctic ice volume can cause variations in the long-wavelength gravity field as a consequence of transient viscoelastic responses

Sensitivity of LAGEOS to changes in Earth's (2, 2) gravity coefficients

In recent years it has become of geophysical interest to detect a possible time variation of the low-degree coefficients of the Earth's gravity field, in particular the (2, 2) tesseral harmonic. We

Temporal Variations of the Earth Gravity Field For 1985–1989 Derived From Lageos

SUMMARY Laser data analysis on the Lageos satellite for the period 1985-1989 has been conducted to recover temporal variations of the low-degree harmonics of the Earth gravity field, in particular of

Deceleration in the Earth's oblateness

For over three decades, satellite laser ranging (SLR) has recorded the global nature of the long‐wavelength mass change within the Earth system. Analysis of the most recent time series of 30 day

Variations in the Rotation of the Earth

Comparison of the observed changes in length of day with variations in the global atmospheric angular momentum indicates that the dominant cause of changes in the earth's spin rate, on time scales from a week to several years, is the exchange of angular momentum between the atmosphere and the mantle.

Causes of fluctuations in the rotation of the Earth

  • M. Rochester
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1984
Over the last decade considerable progress has been made in closing the gap between geophysical theory and the observed changes in the Earth's spin rate and polar motion, which are affected by the
...

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