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Authors: Forieri, A.*
Zuccoli, L.*
Bini, A.*
Zirizzotti, A.*
Remy, F.*
Tabacco, I. E.*
Title: New bedrock map of Dome C, Antarctica, and morphostructural interpretation of the area
Title of journal: Annals of Glaciology
Series/Report no.: / 39 (2004)
Publisher: International Glaciological Society
Issue Date: 2004
Keywords: Antarctica
bedrock map
Abstract: A new bedrock map of the Dome C area is presented, based on all radar data collected during Italian Antarctic Expeditions in 1995, 1997, 1999 and 2001. The map clearly distinguishes the Dome C plateau, along with valleys and ridges. The plateau develops at three different altimetric levels, and its morphology is characterized by hills and closed depressions. There are no visible features which can be ascribed to glacial erosion or deposition. The major valley is 15km wide and 500m deep; its axis is parallel to that of other valleys and ridges in the plateau. The valley bottom is not flat, but contains a saddle at its centre. The morphology of the major valley may be considered a relict one which was not modified by the overlying ice cap. Two large ridges, characterized by hills, saddles and depressions, lie near the boundaries of the area. The map is used to recalculate ice thickness below the European Project for Ice Coring in Antarctica (EPICA) borehole. The new thickness is 3300 m, 50m greater than before, implying that the expected palaeoclimate record from the ice core could extend back >800 kyr.
Appears in Collections:02.02.05. Ice dynamics
02.02.06. Mass balance
04.02.99. General or miscellaneous
Papers Published / Papers in press

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