HR: 0800h
AN: U21C-0628    [Abstracts]
TI: Antarctic Ocean Tides from GRACE Intersatellite Tracking Data and Hydrodynamic Assimilation
AU: Erofeeva, S
EM: serofeev@coas.oregonstate.edu
AF: Oregon State University, COAS, 104 Ocean Admin Bldg, Corvallis, OR 97331-5503, United States
AU: * Han, S
EM: schan@puuoo.gsfc.nasa.gov
AF: NASA/GSFC, Code 698, Greenbelt, MD 20771, United States
AU: Ray, R
EM: ray@nemo.gsfc.nasa.gov
AF: NASA/GSFC, Code 698, Greenbelt, MD 20771, United States
AU: Egbert, G
EM: egbert@coas.oregonstate.edu
AF: Oregon State University, COAS, 104 Ocean Admin Bldg, Corvallis, OR 97331-5503, United States
AU: Luthcke, S
EM: Scott.B.Luthcke@nasa.gov
AF: NASA/GSFC, Code 698, Greenbelt, MD 20771, United States
AB: Long-wavelength components of the oceanic tides surrounding Antarctica are estimated from over three years of GRACE satellite-to-satellite ranging measurements. An inversion is performed for the major constituents M2, O1, and S2, parameterized as localized average mass anomalies relative to a prior tidal model. Satellite state adjustments are made simultaneously. These long-wavelength anomalies are then assimilated into a high-resolution regional hydrodynamic tidal model. Comparisons to independent "ground truth" data, previously collected by King and Padman, show that assimilation of the GRACE inversions results in improved accuracy, for all three constituents.
DE: 4260 Ocean data assimilation and reanalysis (3225)
SC: Union [U]
MN: 2007 Fall Meeting