Physics
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3107601g&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 7, CiteID L07601
Physics
9
Geodesy And Gravity: Ocean/Earth/Atmosphere Interactions (3339), Geodesy And Gravity: Rotational Variations, Geodesy And Gravity: Terrestrial Reference Systems
Scientific paper
A fluid, mobile atmosphere and oceans surrounds the solid Earth and upon its land surface lays a continually changing distribution of ice, snow, and ground water. The changing distribution of mass associated with the motion of these surficial fluids changes the Earth's rotation by changing its inertia tensor and changes the Earth's shape by changing the load on the solid Earth. It has recently been demonstrated that large-scale changes of the Earth's shape, and hence of the mass load causing the Earth's shape to change, can be measured using the global network of GPS receivers. Here, the degree-2 mass load coefficients determined from GPS data are compared with those obtained from Earth orientation observations from which the effects of tides, winds, and currents have been removed. Good agreement is found between these two estimates of the degree-2 mass load, particularly at seasonal frequencies.
Blewitt Geoffrey
Clarke Peter J.
Gross Richard S.
Lavallée David
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