Results 21 to 30 of about 43,823 (313)

Summertime linkage between Antarctic sea-ice extent and ice-shelf basal melting through Antarctic coastal water masses’ variability: a circumpolar Southern Ocean model study

Environmental Research Letters, 2021
Recent observations indicate that two cryospheric components, namely the Antarctic sea ice and ice shelf over the Southern Ocean, have been changing over the decades. Here we analyze results from an ocean–sea ice–ice shelf model to examine variability in
Kazuya Kusahara
doaj   +1 more source

Swell induced vibrations of a thickening ice shelf over a shoaling seabed [PDF]

, 2021
A solution method is developed for a model of ice shelf vibrations in response to ocean waves, in which the ice shelf thickness and seabed beneath the ice shelf vary over distance, and the ice shelf/sub--ice--shelf cavity are connected to the open ocean.
arxiv   +1 more source

Ross ice shelf vibrations [PDF]

Geophysical Research Letters, 2015
AbstractBroadband seismic stations were deployed across the Ross Ice Shelf (RIS) in November 2014 to study ocean gravity wave‐induced vibrations. Initial data from three stations 100 km from the RIS front and within 10 km of each other show both dispersed infragravity (IG) wave and ocean swell‐generated signals resulting from waves that originate in ...
Bromirski, P. D, Diez, A., Gerstoft, P., Stephen, R. A, Bolmer, T., Wiens, D. A, Aster, R. C, Nyblade, A.   +7 more
openaire   +4 more sources

Bathymetric and oceanic controls on Abbot Ice Shelf thickness and stability [PDF]

The Cryosphere, 2014
Ice shelves play key roles in stabilizing Antarctica's ice sheets, maintaining its high albedo and returning freshwater to the Southern Ocean. Improved data sets of ice shelf draft and underlying bathymetry are important for assessing ocean–ice ...
J. R. Cochran, S. S. Jacobs, K. J. Tinto, R. E. Bell   +3 more
doaj   +1 more source

Past ice sheet–seabed interactions in the northeastern Weddell Sea embayment, Antarctica [PDF]

The Cryosphere, 2020
The Antarctic ice sheet extent in the Weddell Sea embayment (WSE) during the Last Glacial Maximum (LGM; ca. 19–25 calibrated kiloyears before present, ka cal BP) and its subsequent retreat from the shelf are poorly constrained, with two ...
J. E. Arndt, J. E. Arndt, R. D. Larter, C.-D. Hillenbrand, S. H. Sørli, M. Forwick, J. A. Smith, L. Wacker   +7 more
doaj   +1 more source

Ice shelf fracture parameterization in an ice sheet model [PDF]

The Cryosphere, 2017
Abstract. Floating ice shelves exert a stabilizing force onto the inland ice sheet. However, this buttressing effect is diminished by the fracture process, which on large scales effectively softens the ice, accelerating its flow, increasing calving, and potentially leading to ice shelf breakup.
Liyun Zhao, Sainan Sun, Sainan Sun, Stephen Cornford, Rupert Gladstone, John C. Moore, John C. Moore   +6 more
openaire   +8 more sources

Ice Shelf Water Structure Beneath the Larsen C Ice Shelf in Antarctica

Geophysical Research Letters, 2023
AbstractUnderstanding ice shelf water (ISW) structure is crucial for studying the basal melting of ice shelves. In this study, we performed large‐eddy simulation experiments to assess ISW structure and basal melt patterns under different current velocity scenarios observed in the Larsen C ice shelf, Antarctica.
Ji Sung Na, Peter E. D. Davis, Byeong‐Hoon Kim, Emilia Kyung Jin, Won Sang Lee   +4 more
openaire   +3 more sources

The complex basal morphology and ice dynamics of the Nansen Ice Shelf, East Antarctica [PDF]

The Cryosphere
Ice shelf dynamics and morphology play an important role in the stability of floating bodies of ice by driving fracturing that can lead to calving, in turn impacting the ability of the ice shelf to buttress upstream grounded ice. Following a 2016 calving
C. F. Dow, D. Mueller, P. Wray, D. Friedrichs, D. Friedrichs, A. L. Forrest, A. L. Forrest, J. B. McInerney, J. B. McInerney, J. Greenbaum, D. D. Blankenship, C. K. Lee, W. S. Lee   +12 more
doaj   +1 more source

Simulating surface height and terminus position for marine outlet glaciers using a level set method with data assimilation [PDF]

Journal of Computational Physics, 474:111766, 2023, 2022
We implement a data assimilation framework for integrating ice surface and terminus position observations into a numerical ice-flow model. The model uses the well-known shallow shelf approximation (SSA) coupled to a level set method to capture ice motion and changes in the glacier geometry.
arxiv   +1 more source

Modelling the influence of marine ice on the dynamics of an idealised ice shelf

Journal of Glaciology, 2023
Understanding the dynamic behaviour of ice shelves, specifically the controls on their ability to buttress the flow of ice into the ocean, is critical for predicting future ice-sheet contributions to sea level rise.
Lisa Craw, Felicity S. McCormack, Sue Cook, Jason Roberts, Adam Treverrow   +4 more
doaj   +1 more source