Results 31 to 40 of about 43,823 (313)
Ice Island Calvings and Ice Shelf Changes, Milne Ice Shelf and Ayles Ice Shelf, Ellesmere Island, N.W.T. [PDF]
ARCTIC, 1986 Analysis of vertical air photographs taken in 1959 and 1974 reveals that a total of 48 sq km, involving 3.3 cubic km, of ice calved from Milne and Ayles ice shelves between July 1959 and July 1974. In addition, Ayles Ice Shelf moved to about 5 km out of Ayles Fiord. It still occupied this exposed position in July 1984. The ice losses and movements have
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Ekström Ice Shelf, Antarctica [PDF]
Annals of Glaciology, 1988 In 1980–81, 1983–84 and 1985–86 airborne surveys with an electromagnetic reflection (EMR) system were made of Ekström Ice Shelf, Antarctica. The EMR data were supplemented by measurements of surface elevation with radar altimetry during flights at a constant pressure altitude.
F. Thyssen, Klaus Grosfeld
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Response to Filchner–Ronne Ice Shelf cavity warming in a coupled ocean–ice sheet model – Part 1: The ocean perspective [PDF]
Ocean Science, 2017 The Regional Antarctic ice and Global Ocean (RAnGO) model has been developed to study the interaction between the world ocean and the Antarctic ice sheet. The coupled model is based on a global implementation of the Finite Element Sea-ice Ocean Model (
R. Timmermann, S. Goeller, S. Goeller
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Intrinsically episodic Antarctic shelf intrusions of circumpolar deep water via canyons [PDF]
, 2023 The structure of the Antarctic Slope Current at the continental shelf is crucial in governing the poleward transport of warm water. Canyons on the continental slope may provide a pathway for warm water to cross the slope current and intrude onto the continental shelf underneath ice shelves, which can increase rates of ice shelf melting, leading to ...
arxiv +1 more source
Diagnosing the sensitivity of grounding-line flux to changes in sub-ice-shelf melting [PDF]
The Cryosphere, 2020 Using a numerical ice flow model, we study changes in ice shelf buttressing and grounding-line flux due to localized ice thickness perturbations, a proxy for localized changes in sub-ice-shelf melting. From our experiments, applied to idealized (MISMIP+)
T. Zhang +4 more
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Rapid fragmentation of Thwaites Eastern Ice Shelf [PDF]
The Cryosphere, 2022 Ice shelves play a key role in the dynamics of marine ice sheets by buttressing grounded ice and limiting rates of ice flux to the oceans. In response to recent climatic and oceanic change, ice shelves fringing the West Antarctic Ice Sheet (WAIS) have ...
D. I. Benn +10 more
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The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model [PDF]
J. Geophys. Res. 114, F03008, 2009, 2008 The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about
arxiv +1 more source
Ice-shelf basal melting in a global finite-element sea-ice/ice-shelf/ocean model [PDF]
Annals of Glaciology, 2012 AbstractThe Finite Element Sea-ice Ocean Model (FESOM) has been augmented by an ice-shelf component with a three-equation system for diagnostic computation of boundary layer temperature and salinity. Ice-shelf geometry and global ocean bathymetry have been derived from the RTopo-1 dataset.
Timmermann +3 more
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Simulating ice-shelf extent using damage mechanics
Journal of Glaciology, 2022 Inaccurate representations of iceberg calving from ice shelves are a large source of uncertainty in mass-loss projections from the Antarctic ice sheet. Here, we address this limitation by implementing and testing a continuum damage-mechanics model in a ...
Samuel B. Kachuck +4 more
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The air content of Larsen Ice Shelf [PDF]
Geophysical Research Letters, 2011 The air content of glacial firn determines the effect and attribution of observed changes in ice surface elevation, but is currently measurable only using labor-intensive ground-based techniques. Here a novel method is presented for using radar sounding measurements to decompose the total thickness of floating ice shelves into thicknesses of solid ice ...
Holland, Paul R. +6 more
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