Summary
Recent advances in the spatial and temporal retrieval of land-based cryospheric change information south of 42.5° allow fairly robust construction of forward model predictions of the time-rate of change in gravity. A map-view prediction is presented for the time-rate of change in geoid, dN/dt that might be retrieved from the currently orbiting gravity space craft, CHAMP (Challenging Mini-Satellite Payload for Geophysical Research and Application) and/or GRACE (Gravity Recovery and Climate Experiment). Complementary computation of the surface gravity change, dδg/dt, is also presented. The latter can be recovered from terrestrial absolute gravity measurements. Also, the computed rate of change Stokes coefficients for degree and order l, m 1–12 may be used as reliable estimates of the Southern Hemisphere cryospheric change contribution to the global low-degree harmonic variability recorded in multidecadal satellite laser ranging (SLR) data sets.
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Ivins, E.R., Rignot, E., Wu, X., James, T.S., Casassa, G. (2005). Ice Mass Balance and Antarctic Gravity Change: Satellite and Terrestrial Perspectives. In: Reigber, C., Lühr, H., Schwintzer, P., Wickert, J. (eds) Earth Observation with CHAMP. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-26800-6_1
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DOI: https://doi.org/10.1007/3-540-26800-6_1
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