Bathymetry of the Amundsen Sea continental shelf: implications for geology, oceanography, and glaciology

Nitsche, F.O.; Jacobs, S.S.; Larter, R.D. ORCID: https://orcid.org/0000-0002-8414-7389; Gohl, K.. 2007 Bathymetry of the Amundsen Sea continental shelf: implications for geology, oceanography, and glaciology. Geochemistry, Geophysics, Geosystems, 8 (10), Q10009. 10, pp. https://doi.org/10.1029/2007GC001694

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Abstract/Summary

The Amundsen Sea continental shelf is one of the most remote areas of coastal Antarctica and was relatively unexplored until the late 1980s. Over the last two decades, increased oceanographic and geological interest has led to several cruises that resulted in sufficient bathymetric data to compile a fairly detailed regional map of the Amundsen continental shelf. We have combined available multibeam and single-beam bathymetry data from various sources and created a new regional bathymetry of the Amundsen Sea continental shelf and margin. Deep trough systems that dominate the inner shelf are aligned with present glaciers and separated by shallower ridges. Shaped by paleo-ice streams, these features merge into a small number of broader troughs on the middle shelf and shoal seaward. They now serve as conduits and reservoirs for relatively warm Circumpolar Deep Water. This new compilation is a major improvement over previously available regional maps and should aid the numerical modeling of ocean circulation, the reconstructions of paleo-ice streams, and the refinement of ice sheet models.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/2007GC001694
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Glacial Retreat in Antarctica and Deglaciation of the Earth System
ISSN:	1525-2027
Additional Keywords:	West Antarctica; continental shelf; bathymetry; seafloor morphology
NORA Subject Terms:	Marine Sciences Glaciology Earth Sciences
Date made live:	19 Oct 2011 14:33 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/11852

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1029/2007GC001694

Programmes:

BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Glacial Retreat in Antarctica and Deglaciation of the Earth System

ISSN:

1525-2027

Additional Keywords:

West Antarctica; continental shelf; bathymetry; seafloor morphology

NORA Subject Terms:

Marine Sciences
Glaciology
Earth Sciences