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Variations in Earth Rotation

Variations in Earth Rotation

Dennis D. McCarthy (Editor), William E. Carter (Editor)

ISBN: 978-1-118-66653-1

Mar 2013, American Geophysical Union

205 pages

Select type: Online Book

Description

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 59.

As part of the Nineteenth General Assembly of The International Union of Geodesy and Geophysics Symposium (IUGG) in Vancouver, Canada, Union Symposium U4, ""Variations in Earth Rotation"" was held August 18-19 1987. The Convenor was Dennis D. McCarthy, U.S. Naval Observatory with P. Paquet, Observatoire Royal de Belgique and M. G. Rochester, St. Johns University serving as co-convernors. In a session on internal structure of the Earth papers dealt with the geophysical effects on Earth rotation parameters. Mantle anelasticity increases the free core nutation (FCN) period by a few days. The period of the FCN and the amplitudes of the main nutation components are sensitive to the ellipticity of the core?]mantle boundary (CMB), and a non-hydrostatic increase of 400m in the flattening of the CMB is a possible explanation of the discrepancies from theory. An alternative suggestion rests on the subseismic description of the nutation spectrum of the stratified liquid core. Evidently new models will have to take into account contributions from the oceans, mantle anelasticity, non-hydrostatic pre-stress, CMB topography and internal core structure.

Preface

International Cooperation in the Study of the Rotation of the Earth
G. A. Wilkins 1

Variational Calculation of Wobble Modes of the Earth
D. E. Staylie 5

On the Complex Eigenfrequency of the ""Nearly Diurnal Free Wobble"" and its Geophysical Interpretation
Jtirgen Neuberg, Nacques Hinderer, and Walter Ztirn 11

Numerical Solution for the Rotation of a Rigid Model Earth
Joachim Schastok, Michael Soffela, and Hanns Ruder 17

The Long Period Elastic Behavior of the Earth
Bernd Richter 21

The Earth's Differential Rotation: Hydrospheric Changes
Nils-Axel Morner 27

The Influence of Ocean and Solid Earth Parameters on Oceanic Eigenoscillations, Tides and
Tidal Dissipation
Wilfried Zahel 33

Secular Tidal and Nontidal Variations in the Earth's Rotation
Milan Burga 43

Tidal Deceleration of the Earth
Peter Brosche 47

Effects of the Tidal Dissipation on the Moon's Orbit and the Earth's Rotation
M. Ooe, H. Sasaki, and H. Kinoshita 51

The Pole Tide in Deep Oceans
S. R. Dickman 59

Tidal Parameters and Nutation: Influence From the Earth Interior
Veronique Dehant 69

The Earth's Forced Nutations: Geophysical Implications
J. M. Wahr and D. de Vries 79

Study of Fluid-Solid Earth Coupling ProcessU sing Satellite Altimeter Data
Wooil M. Moon, Roger Tang, and H. H. Choi 85

Orthogonal Stack of Global Tide Gauge Sea Level Data
A. Trupin and J. Wahr 111

Atmospheric Excitation of the Earth's Rotation Rate
J. B. Merriam 119

Earth Rotation and Climatic Periodicities
J.P. Rozelot and D. Spaute 127

Enso-Related Signals in Earth Rotation, 1962-87
Martine Feissel and Jean Gavoret 133

Forecasting Atmospheric Angular Momentum and Length-of-Data Using Operational
Meteorological Models
R. D. Rosen, D. A. Salstein,T. Nehrkorn, J. O. Dickey, T. M. Eubanks, J. A . Steppe, M. R. P. McCalla and A. J. Miller 139

Forecasting Short-Term Changes in the Earth's Rotation Using Global Numerical Weather
Prediction Models
Raymond Hide 145

Global Water Storage and Polar Motion
John W. Kuehne and Clark R. Wilson 147

Maximum Likelihood Estimates of Polar Motion Parameters
Clark R. Wilson and R. O. Vicente 151

Interannual and Decade Fluctuations in the Earth's Rotation
Jean O. Dickey, T. Marshall Eubanks, and Raymond Hide 157

Short Period UT1 Variations From Iris Daily VLBI Observations
D. S. Robertson, W. E. Carter, and F. W. Fallon 163

Daily Pole Positions Monitored by Very Long Baseline Interferometry
A. Nothnagel, G. D. Nicolson, H. Schuh, J. Campbell, and R. Kilger 171

Error Analysis for Earth Orientation Recovery From GPS Data
N. Zelensky, J. Ray, and P. Liebrecht 177

Simulations to Recover  arth Rotation Parameters With GPS System
P. Paquet and L. Louis 185

Station Coordinates and Earth Rotation Parameters 1986
H. Hauck 189

Reference Frame of LLR
Jin Wen-Jing and Wang Qiang-guo 193

Definition and Realization of Terrestrial Reference Systems for Monitoring Earth Rotation
Claude Boucher 197

A Correlation Study of the Earth's Rotation with El Nino/Southern Oscillation
B. Fong Chao 203