Supervised classification of slush and ponded water on Antarctic ice shelves using Landsat 8 imagery [PDF]
Journal of Glaciology, 2022 Surface meltwater is becoming increasingly widespread on Antarctic ice shelves. It is stored within surface ponds and streams, or within firn pore spaces, which may saturate to form slush.
Rebecca L. Dell +6 more
doaj +4 more sources
Detection of Surface Crevasses over Antarctic Ice Shelves Using SAR Imagery and Deep Learning Method
Remote Sensing, 2022 Crevasses are formed by glacier movement and the stresses within glacier ice. Knowledge of the crevasses’ distribution is critical for understanding the glacier and ice shelf stability. In this study, we propose an automated crevasse extraction framework
Xinwu Li
exaly +2 more sources
Journal of Glaciology, 1979 AbstractIce shelves form where ice flows off the Antarctic ice sheet onto the sea to produce rather flat slabs of floating ice which, for the theoretician, are the simplest of all large ice masses. Boundary conditions are well defined, conditions change very slowly over distances that are large compared with ice thickness, and horizontal velocities are
Robert H. Thomas
core +3 more sources
Troughs developed in ice-stream shear margins precondition ice shelves for ocean-driven breakup. [PDF]
Sci Adv, 2019 Fast-flowing ice shelves may form channels under their margins that promote calving and retreat under warming ocean conditions. Floating ice shelves of fast-flowing ice streams are prone to rift initiation and calving originating along zones of rapid ...
Alley KE +3 more
europepmc +2 more sources
Freshening by glacial meltwater enhances melting of ice shelves and reduces formation of Antarctic Bottom Water. [PDF]
Sci Adv, 2018 Glacial meltwater stops bottom-water formation, allowing warm ocean waters to reach Antarctic ice shelves and drive rapid melting. Strong heat loss and brine release during sea ice formation in coastal polynyas act to cool and salinify waters on the ...
Silvano A +7 more
europepmc +2 more sources
Can unconfined ice shelves provide buttressing via hoop stresses?
Journal of Glaciology, 2020 The stress balance within an ice shelf is key to the resistance, or buttressing, it can provide and in part controls the rate of ice discharge from the upstream ice sheet. Unconfined ice shelves are widely assumed to provide no buttressing.
Martin G. Wearing +2 more
doaj +2 more sources
Channelized topography amplifies melt-sensitivity of cold Antarctic ice shelves [PDF]
Nature CommunicationsThe stability of Antarctic ice shelves, which regulate the flow of grounded ice into the ocean, depends critically on ocean-driven basal melting. Basal channels, widespread features beneath many ice shelves, modulate ice-shelf basal melt rates and ...
Qin Zhou +6 more
doaj +2 more sources
New gravity-derived bathymetry for the Thwaites, Crosson, and Dotson ice shelves revealing two ice shelf populations [PDF]
The Cryosphere, 2020 Ice shelves play a critical role in the long-term stability of ice sheets through their buttressing effect. The underlying bathymetry and cavity thickness are key inputs for modelling future ice sheet evolution.
T. A. Jordan +8 more
doaj +3 more sources
Seawater softening of suture zones inhibits fracture propagation in Antarctic ice shelves. [PDF]
Nat Commun, 2019 Suture zones are abundant on Antarctic ice shelves and widely observed to impede fracture propagation, greatly enhancing ice-shelf stability. Using seismic and radar observations on the Larsen C Ice Shelf of the Antarctic Peninsula, we confirm that such ...
Kulessa B +10 more
europepmc +2 more sources
Response of Pacific-sector Antarctic ice shelves to the El Niño/Southern Oscillation. [PDF]
Nat Geosci, 2018 Satellite observations over the past two decades have revealed increasing loss of grounded ice in West Antarctica, associated with floating ice shelves that have been thinning.
Paolo FS +5 more
europepmc +2 more sources