Results 21 to 30 of about 2,982 (205)

Crevasses triggered on Pine Island Glacier by drilling through an exceptional melt layer [PDF]

, 2010
The basic theory of crevasse formation suggests that crevasses initiate at or near the surface. However, due to variations in stress with depth, it has been suggested that it is possible for crevasses to initiate at depths of 10–30m.
Julian B. T. Scott, Vaughan, David, Scott, Julian B.T., Robert G. Bingham, Andrew M. Smith, Smith, Andrew, Smith, Andrew M., Bingham, Robert, Vaughan, David G., Scott, Julian, Bingham, Robert G., David G. Vaughan, Julian B.T. Scott   +12 more
core   +1 more source

A physically based calving model applied to marine outlet glaciers and implications for the glacier dynamics [PDF]

, 2010
We present results from numerical ice-flow models that include calving criteria based on penetration of surface and basal crevasses, which in turn is a function of longitudinal strain rates near the glacier front.
Vieli, Andreas, Nick, Faezeh M, van der Veen, C.J., Vieli, A., Benn, Douglas, Benn, Douglas D.I., van der Veen, Cornelis, C.J. Van Der Veen, Benn, Doug I, Nick, Faezeh, Afd Marine and Atmospheric Research, F.M. Nick, Marine and Atmospheric Research, Van der Veen, C J, Benn, Douglas I, A. Vieli, Venn, D. I., van der Veen, C. J., Benn, D.I., Nick, F.M., Nick, F. M., Van der Veen, Cornelis J., D.I. Benn, Benn, Doug I; id_orcid   +23 more
core   +1 more source

Penetration Depth of Closely Spaced Water-free Crevasses

, 1977
An approximate, analytic solution is found for the profile of a water-free crevasse in a field of closely spaced crevasses. The depth of penetration of the crevasses into the glacier is found.
J. Weertman
core   +2 more sources

Structural provinces of the Ross Ice Shelf, Antarctica

Annals of Glaciology, 2017
The surface of the Ross Ice Shelf (RIS) is textured by flow stripes, crevasses and other features related to ice flow and deformation. Here, moderate resolution optical satellite images are used to map and classify regions of the RIS characterized by ...
Christine M. LeDoux, Christina L. Hulbe, Martin P. Forbes, Ted A. Scambos, Karen Alley   +4 more
doaj   +1 more source

Bottom Crevasses [PDF]

Journal of Glaciology, 1980
AbstractAn approximate calculation is made of the rate at which a bottom crevasse in a cold ice shelf or tabular iceberg can close shut by freezing of water and can creep open through the creep deformation of ice. In all but the thickest ice shelves and icebergs, those with a thickness greater than about 400 m, the freezing process is the more ...
openaire   +1 more source

Effects of geometry on the seismic wavefield of Alpine glaciers

Annals of Glaciology, 2019
Passive seismology allows measurement of the structure of glaciers and ice sheets. However, most techniques used so far in this context are based on horizontally homogeneous media where parameters vary only with depth (1-D approximations), which are ...
Lukas E. Preiswerk, Clotaire Michel, Fabian Walter, Donat Fäh   +3 more
doaj   +1 more source

Seismic observations of crevasse growth following rain-induced glacier acceleration, Haupapa/Tasman Glacier, New Zealand

Annals of Glaciology, 2019
Changing rates of water input can affect both the flow of glaciers and ice sheets and their propensity to crevasse. Here we examine geodetic and seismic observations during two substantial (10–18-times background velocity) rain-induced glacier ...
Samuel Taylor-Offord, Huw Horgan, John Townend, J. Paul Winberry   +3 more
doaj   +1 more source

Bottom Crevasses in the Ross Ice Shelf

, 1975
Bottom crevasses were detected at many locations in the southern portion of the Ross Ice Shelf during the 1973-74 austral summer. The crevasses which extended up about 100 m from the bottom of the shelf were detected by radio-echo sounding.
John W. Clough
core   +2 more sources

Recent structural evolution of Forni Glacier tongue (Ortles-Cevedale Group, Central Italian Alps)

Journal of Maps, 2017
Structural glaciology yields important details about the evolution of glacier dynamics in response to climate change. The maps provided here document the occurrence and evolution of brittle and ductile structures on the tongue of Forni Glacier, Ortles ...
Roberto Sergio Azzoni, Davide Fugazza, Marta Zennaro, Michele Zucali, Carlo D’Agata, Davide Maragno, Massimo Cernuschi, Claudio Smiraglia, Guglielmina Adele Diolaiuti   +8 more
doaj   +1 more source

A new occurrence of tetrapod footprints from the Late Triassic of the Candelária Sequence, Brazil

The Anatomical Record, EarlyView.
Abstract The Hyperodapedon Assemblage Zone of the Candelária Sequence (Santa Maria Supersequence, Paraná Basin) preserves one of the most significant Late Triassic continental vertebrate assemblages in southern Brazil. Despite the relatively well‐documented body fossil record from this interval, ichnological records remain comparatively scarce.
Murilo Andrade‐Silva, Heitor Francischini   +1 more
wiley   +1 more source