HR: 11:35h
AN: C12A-06    [Abstracts]
TI: Tides Underneath the Ross Ice Shelf from ICESat Laser Altimetry
AU: * Ray, R
EM: richard.ray@nasa.gov
AF: NASA GSFC, Code 698, Greenbelt, MD 20771, United States
AB: Satellite laser altimetry holds promise for mapping poorly known tides underneath Antarctic ice shelves. The amount of ICESat data now collected over the southernmost section of the Ross Ice Shelf is sufficient to warrant direct tidal analysis. Tides are estimated here from ten operational ICESat periods. A response analysis is used to help overcome unfavorable tidal sampling, especially an S₂ correlation with the annual cycle. Comparisons of tidal estimates against independent station data show RMS constituent differences around 3 cm---still somewhat large, but an encouraging result for such a challenging region.
DE: 0726 Ice sheets
DE: 1222 Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)
DE: 4560 Surface waves and tides (1222)
SC: Cryosphere [C]
MN: 2007 Fall Meeting