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Record #164644:

Coupled marine-ice-sheet/Earth dynamics using a dynamically consistent ice-sheet model and a self-gravitating viscous Earth model / E. Le Meur, Richard C.A. Hindmarsh.

Title: Coupled marine-ice-sheet/Earth dynamics using a dynamically consistent ice-sheet model and a self-gravitating viscous Earth model / E. Le Meur, Richard C.A. Hindmarsh.
Author(s): Le Meur, E.
Hindmarsh, Richard C. A.
Date: 2001.
In: Journal of Glaciology. (2001.), Vol. 47(157) (2001)
Abstract: Investigates how isostatic depression caused by marine ice sheets affects grounding line migration. Solves full Stokes equations in spherical domain to model lithosphere and mantle mechanics. Couples this to a marine ice sheet model based on shallow ice approximation. Accuracy of ice sheet model captures moving margin and neutral equilibrium. Includes basal sliding with restrictions. Argues dynamics of complex grounding line region do not affect those of the rest of the marine ice sheet when there is sufficient basal traction. Sheet/shelf coupling is therefore kinematic, not dynamic. Considers steady ice-sheet profiles and time-dependent response to sea-level forcing. Modelled post glacial grounding line retreats are tens of km, much less than that of, e.g., Siple Coast. Concludes that sea-level change and lithospheric coupling are unlikely to play significant roles in the retreat of marine ice sheets. Reverse bed slopes found to increase sensitivity, but not introduce instability. Notes that incorporating lithosphere did not change qualitative dynamics (i.e. neutral equilibrium), but that existence of ice streams in which longitudinal stresses play a role may do so.
Notes:

Journal of Glaciology. Vol. 47(157) :258-270 (2001).

Keywords: 551.324 -- Land ice.
551.324.4 -- Land ice, mass and energy balance.
550.312 -- Gravity and isostasy.
551.324.63 -- Land ice, advance and retreat.
551.461.2 -- Sea level, fluctuations.
519.673 -- Modelling.
.000(410) -- British author.
E5 -- Glaciology: land ice.
(*2) -- Polar regions.
(*7) -- Antarctic regions.
(*767.5) -- Siple Coast.
SPRI record no.: 164644

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245 10 ‡aCoupled marine-ice-sheet/Earth dynamics using a dynamically consistent ice-sheet model and a self-gravitating viscous Earth model /‡cE. Le Meur, Richard C.A. Hindmarsh.
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500 ## ‡aJournal of Glaciology. Vol. 47(157) :258-270 (2001).
520 3# ‡aInvestigates how isostatic depression caused by marine ice sheets affects grounding line migration. Solves full Stokes equations in spherical domain to model lithosphere and mantle mechanics. Couples this to a marine ice sheet model based on shallow ice approximation. Accuracy of ice sheet model captures moving margin and neutral equilibrium. Includes basal sliding with restrictions. Argues dynamics of complex grounding line region do not affect those of the rest of the marine ice sheet when there is sufficient basal traction. Sheet/shelf coupling is therefore kinematic, not dynamic. Considers steady ice-sheet profiles and time-dependent response to sea-level forcing. Modelled post glacial grounding line retreats are tens of km, much less than that of, e.g., Siple Coast. Concludes that sea-level change and lithospheric coupling are unlikely to play significant roles in the retreat of marine ice sheets. Reverse bed slopes found to increase sensitivity, but not introduce instability. Notes that incorporating lithosphere did not change qualitative dynamics (i.e. neutral equilibrium), but that existence of ice streams in which longitudinal stresses play a role may do so.
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.4 -- Land ice, mass and energy balance.‡2udc
650 07 ‡a550.312 -- Gravity and isostasy.‡2udc
650 07 ‡a551.324.63 -- Land ice, advance and retreat.‡2udc
650 07 ‡a551.461.2 -- Sea level, fluctuations.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
650 07 ‡a.000(410) -- British author.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
651 #7 ‡a(*2) -- Polar regions.‡2udc
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*767.5) -- Siple Coast.‡2udc
700 1# ‡aHindmarsh, Richard C. A.
773 0# ‡7nnas ‡tJournal of Glaciology. ‡gVol. 47(157) (2001) ‡wSPRI-20534
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