HR: 11:20h
AN: G42A-05    [Abstracts]
TI: Determining the influence of various OAM models on EOP
AU: * Luzum, B
EM: brian.luzum@usno.navy.mil
AF: U.S. Naval Observatory, 3450 Massachusetts Ave. NW, Washington, DC 20392, United States
AU: van Dam, T
EM: tonie.vandam@uni.lu
AF: University of Luxembourg, 162a, avenue de la Faïencerie, Luxembourg, L-1511, Luxembourg
AU: Gross, R
EM: Richard.Gross@jpl.nasa.gov
AF: Jet Propulsion Laboratory, Mail Stop 238-600 4800 Oak Grove Drive, Pasadena, CA 91109, United States
AB: Earth orientation parameters (EOPs) are effected by a number of geophysical factors. In particular, oceanic angular momentum (OAM) is known to cause changes in polar motion and length of day through changes in the ocean bottom pressure and currents. While these forcings are a significant cause of EOP variation, OAM models have not been used in operational combination and prediction of EOPs because no OAM model is currently being run in an operational mode. This analysis looks at the influence of OAM models on EOPs with particular attention to investigation of the amplitude of the effects and the frequency range over which OAM influences EOPs. Potential benefits to EOP determination and prediction from an operational OAM model are discussed.
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
DE: 1239 Earth rotation variations
SC: Geodesy [G]
MN: 2007 Fall Meeting