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Lithospheric Thickness, Antarctic Deglaciation History, and Ocean Basin Discretization Effects in a Global Model Of Postglacial Sea Level Change: a Summary of Some Sources of Nonuniqueness

Published online by Cambridge University Press:  20 January 2017

W. R. Peltier
W. R. Peltier*
Affiliation:
Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7
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Abstract

The global model of postglacial relative sea level variations that has been developed over the past decade is employed to investigate the constraints that it may be invoked to place on the timing of the deglaciation of West Antarctica. The analyses presented here confirm the suggestion of P. Wu and W. R. Peltier (1983, Geophysical Journal of the Royal Astronomical Society 74 , 377–450) that the model of this event employed in J. A. Clark and C. S. Lingle (1979Quaternary Research 11 , 279–298) may be simply modified to rectify the misfits between theory and observation that are otherwise obtained at Southern Hemisphere sites. A large number of Southern Hemisphere relative sea level data are shown to require that the retreat of Antarctic ice substantially lagged the retreat of Northern Hemisphere ice if the deglaciation of Antarctica was abrupt. The time of onset of Antarctic deglaciation is thereby shown to coincide with the time of most rapid Northern Hemisphere deglaciation. Sensitivity tests are performed which demonstrate that this result is relatively insensitive to the discretization employed to represent the ocean basins; the only exception to this general rule obtains at some coastal sites at which a trade-off is revealed between the delay of West Antarctic melting and the thickness of the lithosphere required to reconcile the observed local variations of relative sea level. At such sites, which are all in the far field of the ice sheets, some attention must be paid to the accuracy of the local finite element representation of the oceans and to the details of the Antarctic deglaciation history.

Type
Original Articles
Information
Quaternary Research , Volume 29 , Issue 2 , March 1988 , pp. 93 - 112
Copyright
University of Washington

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References

1983 Barnett, J.P., Possible changes in global sea level and their causes. Climate Change. 5 15–38.CrossRefGoogle Scholar
1986 Carter, W.E., Robertson, D.S., Pyle, T.E., Diamante, J., The application of geodetic radio interferometric surveying to the monitoring of sea-level. Geophysical Journal of the Royal Astronomical Society. 87 3–13.CrossRefGoogle Scholar
1978 Clark, J.A., Farrell, W.E., Peltier, W.R., Global changes in postglacial sea-level: A numerical calculation. Quaternary Research. 9 265–287.Google Scholar
1979 Clark, J.A., Lingle, C.S., Predicted relative sea-level changes (18,000 years B.P. to present) caused by late glacial retreat of the Antarctic ice sheet. Quaternary Research. 11 279–298.Google Scholar
1980 Denton, G., Hughes, T.H., The Last Great Ice Sheets. Wiley, New York, 437–467.Google Scholar
1976 Farrell, W.E., Clark, J.A., On post-glacial sea-level. Geophysical Journal of the Royal Astronomical Society. 46 647–667.Google Scholar
1986 Forte, A.M., Peltier, W.R., Surface plate kinematics and mantle convection. Fuchs, K., Froidevaux, C., The Composition, Structure and Dynamics of the Lithosphere Asthenosphere System. AGU Press, Washington, DC, 125–136.Google Scholar
1987 Forte, A.M., Peltier, W.R., Mantle convection and aspherical earth structure: The importance of poloidaltoroidal coupling. Journal of Geophysical Research. 92 3645–3679.Google Scholar
1975 Gilbert, F., Dziewonski, A.M., An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra. Philosophical Transactions of the Royal Society of London. 278 187–269.Google Scholar
1984 Hager, B.H., Subducted slabs and the geoid: Constraints on mantle rheology and flow. Journal of Geophysical Research. 89 6003–6015.Google Scholar
1985 Hyde, W.T., Peltier, W.R., Sensitivity experiments with a model of the ice age cycle: The response to harmonic forcing. Journal of the Atmospheric Sciences. 42 2170–2188.2.0.CO;2>CrossRefGoogle Scholar
1987 Hyde, W.T., Peltier, W.R., Sensitivity experiments with a model of the ice age cycle: The response to Milankovitch forcing. Journal of the Atmospheric Sciences. 44 1351–1376.Google Scholar
1984 Meier, M.F., Contribution of small glaciers to global sea-level. Science. 226 1418–1421.CrossRefGoogle ScholarPubMed
üller and Stephenson, 1975 Müller, P.M., Stephenson, F.R., The acceleration of the earth and moon from early observations. Rosenburg, G.D., Runcorn, S.K., Growth Rhythms and History of the Earth's Rotation. Wiley, New York, 459–534.Google Scholar
1952 Munk, W.H., Revelle, R., On the geophysical interpretation of irregularities in the rotation of the earth. Monthly Notices of the Royal Astronomical Society, Geophysical Supplement. 6 331–347.Google Scholar
1974 Peltier, W.R., The impulse response of a Max-well earth. Reviews of Geophysics and Space Physics. 12 649–669.Google Scholar
1976 Peltier, W.R., Glacial isostatic adjustment. II. The inverse problem. Geophysical Journal of the Royal Astronomical Society. 46 669–706.Google Scholar
1981 Peltier, W.R., Ice Age geodynamics. Annual Reviews of Earth and Planetary Sciences. 9 199–225.Google Scholar
1982 Peltier, W.R., Dynamics of the ice age earth. Advances in Geophysics. 24 1–146.CrossRefGoogle Scholar
1983 Peltier, W.R., Constraint on deep mantle viscosity from LAGEOS acceleration data. Nature (London). 304 434–436.Google Scholar
1984 Peltier, W.R., The thickness of the continental lithosphere. Journal Geophysical Research. 89 11,303–11,316.Google Scholar
1985a Peltier, W.R., The LAGEOS constraint on deep mantle viscosity: Results from a new normal mode method for the inversion of viscoelastic relaxation spectra. Journal of Geophysical Research. 90 9411–9421.Google Scholar
1985b Peltier, W.R., New constraints on transient lower mantle rheology and internal mantle buoyancy from glacial rebound data. Nature (London). 318 614–617.Google Scholar
1985c Peltier, W.R., Mantle convection and viscoelasticity. Annual Review of Fluid Mechanics. 17 561–608.Google Scholar
1986 Peltier, W.R., Deglaciation induced vertical motion of the North American continent and transient lower mantle rheology. Journal of Geophysical Research. 91 9099–9123.Google Scholar
1976 Peltier, W.R., Andrews, J.T., Glacial isostatic adjustment. I. The forward problem. Geophysical Journal of the Royal Astronomical Society. 46 605–646.Google Scholar
1986 Peltier, W.R., Drummond, R.A., Tushingham, A.M., Post-glacial rebound and transient lower mantle rheology. Geophysical Journal of the Royal Astronomical Society. 87 79–116.Google Scholar
1978 Peltier, W.R., Farrell, W.E., Clark, J.A., Glacial isostasy and relative sea-level: A global finite element model. Tectonophysics. 50 81–110.CrossRefGoogle Scholar
1984 Peltier, W.R., Hyde, W.T., A model of the ice age cycle. Berger, A., Imbrie, J., Hays, J., Kukla, G., Saltzman, B., Milankovitch and Climate. Reidel, Dordrecht.Google Scholar
1982 Peltier, W.R., Wu, P., Mantle phase transitions and the free air gravity anomalies over Fennoscandia and Laurentia. Geophysical Research Letters. 9 731–734.Google Scholar
1983 Peltier, W.R., Wu, P., Continental lithospheric thickness and deglaciation induced time polar wander. Geophysical Research Letters. 10 181–184.Google Scholar
1984 Richards, M.A., Hager, B.H., Geoid anomalies in a dynamic earth. Journal of Geophysical Research. 89 5987–6002.Google Scholar
1984 Rubincam, D.P., Postglacial rebound observed by LAGEOS and the effective viscosity of the lower mantle. Journal of Geophysical Research. 89 1077–1087.CrossRefGoogle Scholar
1969 Vincente, R.O., Yumi, S., Co-ordinates at the pole (1899–1968), returned to the conventional international origin. Publications of the International Latitude Observatory of Mizusawa. 7 41–50.Google Scholar
1970 Vincente, R.O., Yumi, S., Revised values (1941–1961) of the co-ordinates of the pole referred to the CIO. Publications of the International Latitude Observatory of Mizusawa. 7 109–112.Google Scholar
1983 Wu, P., Peltier, W.R., Glacial isostatic adjustment and the free air gravity anomaly as a constraint on deep mantle viscosity. Geophysical Journal of the Royal Astronomical Society. 74 377–450.Google Scholar
1984 Wu, P., Peltier, W.R., Pleistocene deglaciation and the earth's rotation: A new analysis. Geophysical Journal of the Royal Astronomical Society. 76 753–791.Google Scholar
1983 Yoder, C.F., Williams, J.G., Dickey, J.O., Schultz, B.E., Eanes, R.J., Tapley, B.D., Secular variation of earth's gravitational harmonic J 2 coefficient from Lageos and nontidal acceleration of earth rotation. Nature (London). 303 757–762.Google Scholar