Mathematics – Logic
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30xsde6c&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 24, pp. SDE 6-1, CiteID 2257, DOI 10.1029/2003GL018688
Mathematics
Logic
9
Geodesy And Gravity: Geopotential Theory And Determination, Geodesy And Gravity: Ocean/Earth/Atmosphere Interactions (3339), Geodesy And Gravity: Rotational Variations, Hydrology: Soil Moisture, Oceanography: Physical: General Circulation
Scientific paper
Spherical harmonic degree 2 gravitational variations ΔC21, ΔS21, and ΔC20 are estimated from accurately measured Earth rotational changes and compared with predictions from atmospheric, oceanic, and hydrological models. Earth rotation-derived changes agree very well with model predictions over a broad frequency band, and particularly well at intraseasonal and seasonal time scales. The agreement is significantly better compared to previous studies, due mainly to improved oceanic and hydrological models. An independent determination of degree 2 changes serves as an important constraint for satellite-based estimates such as those of the Gravity Recovery and Climate Experiment (GRACE) mission.
Chen Jing-Ling
Wilson Richard C.
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