Evidence for basal marine ice in the Filchner-Ronne ice shelf
Article Abstract:
The Filchner-Ronne ice sheet in West Antarctica probably originated at least partly from the accretion of basal marine ice. Scientists have debated whether the ice that makes up the shelf derived meteorically from above or by the build-up of saline sea ice from below. However, analysis of ice cores from the shelf found an alteration in physical properties at the 150 meter depth that is attributable to the transition from meteoric ice to basal marine ice. This marine ice may have accumulated due to the action of ice platelets on the water column.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Comparison of deep ice cores
Article Abstract:
Comparative studies of the GRIP and GISP2 deep ice cores from Central Greenland show that the small diameters of the cores and the absence of highly reliable stratigraphic data prevent confirmation of the instability of the Eemian record. Some core structures higher than the Eemian are larger than the core diameter and represent inverted strata. Moderate simple-shear deformation is observed in both cores with z-shaped folds and overturned limbs smaller than the core diameter.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Influence of subglacial geology on the position of a West Antartic ice stream from seismic observations
Article Abstract:
Much of the interior West Antarctic Ice Sheet is drained by ice streams, with the interior feeding the floating Ross Ice Shelf. A good knowledge of subglacial geology is needed to understand ice-stream behaviour and predict the response to climate change. Seismic observations have been used to prove that a margin of the upglacier part of an ice stream is directly above a sedimentary basin. It is concluded that the position of the ice stream is dependent on subglacial geology.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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