Ocean tidal solutions in Antarctica from GRACE inter-satellite tracking data

被引:26
作者
Han, Shin-Chan
Ray, Richard D.
Luthcke, Scott B.
机构
[1] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Greenbelt, MD 20771 USA
[2] Univ Maryland Baltimore Cty, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21228 USA
关键词
D O I
10.1029/2007GL031540
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Long-wavelength components of the oceanic tides surrounding Antarctica are estimated directly from three years of GRACE satellite-to-satellite ranging measurements. An inversion is performed for the major constituents M-2, O-1, and S-2, with K-1 excluded because of inadequate phase sampling. The tides are parameterized as localized average mass anomalies over areas approximately 300(2) km(2); other parameters, including satellite state adjustments, are estimated simultaneously with the tides. Qualitative comparison of our solutions with in situ tide measurements shows agreement in spatial pattern, clearly indicating regions where our adopted prior model is inadequate. To exploit these solutions, follow-on work must assimilate these long-wavelength components into a high-resolution numerical tidal model.
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页数:6
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