Results 31 to 40 of about 199,872 (251)

Viscous and elastic buoyancy stresses as drivers of ice-shelf calving

Journal of Glaciology, 2020
The Antarctic Ice Sheet loses mass via its ice shelves predominantly through two processes: basal melting and iceberg calving. Iceberg calving is episodic and infrequent, and not well parameterized in ice-sheet models.
Cyrille Mosbeux, Till J. W. Wagner, Maya K. Becker, Helen A. Fricker   +3 more
doaj   +1 more source

Magnetic anisotropy and debris-dependent rheological heterogeneity within stratified basal ice

Journal of Glaciology, 2019
Basal ice of glaciers and ice sheets frequently contains a well-developed stratification of distinct, semi-continuous, alternating layers of debris-poor and debris-rich ice.
Nathan R. Hopkins, Edward B. Evenson, Dario Bilardello, Richard B. Alley, Claudio Berti, Kenneth P. Kodama   +5 more
doaj   +1 more source

Effect of Lateral and Stress‐Dependent Viscosity Variations on GIA Induced Uplift Rates in the Amundsen Sea Embayment

Geochemistry, Geophysics, Geosystems, 2021
Accurate glacial isostatic adjustment (GIA) models are required for correcting measurements of mass change in Antarctica and for improving knowledge of the sub‐surface, especially in areas of large current ice loss such as the Amundsen Sea Embayment (ASE)
B. Blank, V. Barletta, H. Hu, F. Pappa, W. van der Wal   +4 more
doaj   +1 more source

Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets [PDF]

The Cryosphere, 2022
The crystal orientation fabric (COF) of a polar ice sheet has a significant effect on the rheology of the ice sheet. With the aim of better understanding the deformation regime of ice sheets, the work presented here investigates the COF in the upper 80 %
T. Saruya, S. Fujita, S. Fujita, Y. Iizuka, A. Miyamoto, H. Ohno, A. Hori, W. Shigeyama, W. Shigeyama, M. Hirabayashi, K. Goto-Azuma, K. Goto-Azuma   +11 more
doaj   +1 more source

Processes controlling the downstream evolution of ice rheology in glacier shear margins: case study on Rutford Ice Stream, West Antarctica

Journal of Glaciology, 2018
Ice rheology governs how glaciers flow and respond to environmental change. The rheology of glacier ice evolves in response to a variety of mechanisms, including damage, heating, melting and the development of crystalline fabric.
BRENT M. MINCHEW, COLIN R. MEYER, ALEXANDER A. ROBEL, G. HILMAR GUDMUNDSSON, MARK SIMONS   +4 more
doaj   +1 more source

The Causes and Implications of Microstructures in Glacial Sediments [PDF]

, 1998
This thesis examines how microstructures in glaciogenic sediments reflect the processes forming them, and how these microstructures then affect the conditions around them, through a series of field studies, laboratory tests, models, and statistical ...
Evans, Andrew John
core   +6 more sources

Estimation of asthenospheric deformation law for the post glacial rebound based on the deformation mechanism map of olivine

Antarctic Record, 1998
Linear deformation laws have been applied to post glacial rebound, while many speculations based on real rock samples support non-linear rheology in the upper mantle. Essential information is required to support the assumed constitutive relation.
Atsuki Kubo
doaj   +1 more source

GEORGIA: A Graph Neural Network Based EmulatOR for Glacial Isostatic Adjustment

Geophysical Research Letters, 2023
Glacial isostatic adjustment (GIA) modeling is not only useful for understanding past relative sea‐level change but also for projecting future sea‐level change due to ongoing land deformation.
Yucheng Lin, Pippa L. Whitehouse, Andrew P. Valentine, Sarah A. Woodroffe   +3 more
doaj   +1 more source

Effects of mantle rheologies on viscous heating induced by Glacial Isostatic Adjustment

Geophysical Journal International, 2017
No description ...
Huang PP, Wu P, van der Wal W
openaire   +4 more sources

Geodetic Observations of Time‐Variable Glacial Isostatic Adjustment in Southeast Alaska and Its Implications for Earth Rheology [PDF]

Journal of Geophysical Research: Solid Earth, 2019
AbstractGlobal Positioning System observations in Southeast Alaska show evidence for interannual variations in uplift rates, which are consistent with an acceleration of mass loss rates across the region from the 1990s to 2012. We constructed an updated regional loading model based on updated twentieth century average deglaciation estimates. This model
Yan Hu, Jeffrey T. Freymueller
openaire   +1 more source