Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.6751n&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, May 10, 1990, p. 6751-6757.
Physics
17
Angular Velocity, Atmospheric Tides, Earth Rotation, Long Term Effects, Ocean Dynamics, Angular Momentum, Dynamic Models, Ocean Models, Power Spectra, Very Long Base Interferometry
Scientific paper
As a generalization of the zonal response coefficient first introduced by Agnew and Farrell (1978), the zonal response function kappa of the solid earth-ocean system is defined as the ratio, in the frequency domain, of the tidal change in earth's rotation rate to the tide-generating potential. Amplitudes and phases of kappa for the monthly, fortnightly, and nine-day lunar tides are estimated from 2 1/2 years of VLBI UT1 observations, corrected for atmospheric angular momentum effects using NMC wind and pressure series. Using the dynamic ocean tide model of Dickman (1988, 1989), amplitudes and phases of kappa for an elastic earth-ocean system are predicted. The predictions confirm earlier results which found that dynamic effects of the longer-period ocean tides reduce the amplitude of kappa by about 1 percent.
Dickman Steven R.
Nam Young
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