Results 231 to 240 of about 186,723 (251)

On transient rheology and glacial isostasy

Journal of Geophysical Research, 1986
Theoretical predictions from analytical, self‐gravitating, layered earth models with Maxwell, Burgers' body, and standard linear solid rheologies are employed to explore the extent to which transient creep may have influenced the inference of long‐term mantle viscosity from analysis of the various signatures derived from the process of glacial ...
Paolo Gasperini, Enzo Boschi
exaly   +2 more sources

In search of an ice history that is consistent with composite rheology in Glacial Isostatic Adjustment modelling

Earth and Planetary Science Letters, 2019
Abstract Global reconstructions of the Earth's Quaternary ice sheet history such as ICE-6G assume that mantle rheology is linear and Earth properties are laterally homogeneous. However, these assumptions are unrealistic because high temperature/pressure creep experiments show that both linear and non-linear creep laws operate simultaneously in the ...
Patrick Wu, Holger Steffen, Pingping Huang   +2 more
exaly   +3 more sources

Sea levels and uplift rate from composite rheology in glacial isostatic adjustment modeling

Journal of Geodynamics, 2010
Abstract Since laboratory experiments point to the existence of both diffusion creep and power-law creep at realistic mantle conditions, a composite rheology in which both mechanisms operate at the same time so that their strains are combined might be more realistic and has in the past been shown to provide a better fit to observations of glacial ...
Patrick Wu, Wouter van der Wal, Michael Sideris   +2 more
exaly   +4 more sources

Mantle rheology and satellite signatures from present‐day glacial forcings

Journal of Geophysical Research, 1988
We study the changes of the long‐wavelength portion of the Earth's gravity field as a result of present‐day glacial discharges and the possible growth of the Antarctic ice sheet. We employ both Maxwell and Burgers' body rheologies and find that there are significant differences in the responses between the two rheologies for time spans less than a ...
Paolo Gasperini, Roberto Sabadini
exaly   +2 more sources

Rheology of Mantle and Lithosphere Inferred from Post-Glacial Uplift in Fennoscandia

1991
The earth’s response to glacial loading/unloading offers exceptional promise for the study of the physical properties of the lithosphere and mantle because aspects of the isostatic adjustment are very sensitive to mantle rheology and, to a lesser degree, lithosphere thickness.
W. Fjeldskaar, L. Cathles
exaly   +2 more sources

Glacial Isostasy, Sea-Level and Mantle Rheology

1991
Post-Glacial Rebound.- "Rheology of mantle and lithosphere inferred 1 from post-glacial uplift in Fennoscandia".- "Deep continental roots: the 21 effects of lateral variations of viscosity on post-glacial rebound".- "A model for Devensian and Flandrian glacial rebound and sea-level change in Scotland".- "Radial resolution in the inference of mantle ...
exaly   +2 more sources

New constraints on transient lower mantle rheology and internal mantle buoyancy from glacial rebound data

Nature, 1985
A model of mantle rheology which has an explicit transient component of its relaxation spectrum is shown to reconcile two apparently conflicting inferences of lower mantle viscosity. If recent analyses of isostatic geoid anomalies are correct in requiring a large increase of viscosity with depth, then the weak viscosity stratification demanded by ...
exaly   +2 more sources

Glacial isostasy, sea level and mantle rheology

Physics of the Earth and Planetary Interiors, 1992
exaly   +2 more sources

Modelling glacial isostatic adjustment with composite rheology

, 2020
Modelling glacial isostatic adjustment (GIA) can be employed to infer mantle rheologic structure and reconstruct ice history. The former is important in understanding mantle convection process while the later can provide an insight in understanding sea ...
Huang, Pingping, 黃平平
openaire   +2 more sources

Use of a viscous model of till rheology to describe gravitational loading instabilities in glacial sediments

Geological Society, London, Special Publications, 2000
Abstract This paper models the operation of loading (Rayleigh-Taylor) instabilities in sediments using an effective-pressure-dependent viscosity such has been used to model the deformation of sediment beneath glaciers. A particular feature is a strong increase of viscosity with depth, resulting from the fact that the effective pressure ...
Hindmarsh, Richard C.A., Rijsdijk, K.F.
openaire   +2 more sources