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A spectral analysis of the earth's angular momentum budgetThe exchange of angular momentum between the solid earth and the atmosphere from January 1976 through March 1982 is investigated using estimates of the earth's rotation from optical astrometry and lunar laser ranging and meteorological estimates of the atmospheric angular momentum M(atm). The physics of the earth's angular momentum budget is described, and earth rotation measurements are related to changes in the angular momentum of the fluid parts of the earth. The availability and reliability of earth rotation and M(atm) data are reported, and the possibility of estimating the exchange of angular momentum with the oceans and with the core is examined. Estimates of the power spectrum, cospectral coherence, and linear transfer functions and an analysis of the unmodeled part of the angular momentum budget are presented and discussed. The amplitude and phase of the semiannual, monthly, and fortnightly tidal variations in the length of day are estimated after removing observed atmospheric excitation.
Document ID
19850055328
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Eubanks, T. M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Steppe, J. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dickey, J. O.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Callahan, P. S.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 12, 2013
Publication Date
June 10, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A37479
Distribution Limits
Public
Copyright
Other

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