Mantle rheology and satellite signatures from present-day glacial forcings

Details Mantle rheology and satellite signatures from present-day glacial forcings Mantle rheology and satellite signatures from present-day glacial forcings

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93..437s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Jan. 10, 1988, p. 437-447.

Physics

28

Earth Gravitation, Earth Mantle, Glaciology, Planetary Gravitation, Rheology, Satellite Observation, Antarctic Regions, Geodetic Satellites, Zonal Harmonics

Scientific paper

Changes in the long-wavelength region of the earth's gravity field resulting from both present-day glacial discharges and the possible growth of the Antarctic ice sheet are considered. Significant differences in the responses between the Maxell and Burger body rheologies are found for time spans of less than 100 years. The quantitative model for predicting the secular variations of the gravitational potential, and means for incorporating glacial forcings, are described. Results are given for the excitation of the degree two harmonics. It is suggested that detailed satellite monitoring of present-day ice movements in conjunction with geodetic satellite missions may provide a reasonable alternative for the esimation of deep mantle viscosity.

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