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A new high-resolution bathymetry model for the Terre Adélie and George V continental margin, East Antarctica

Published online by Cambridge University Press:  24 September 2010

Robin J. Beaman ,
Philip E. O’Brien ,
Alexandra L. Post  and
Laura De Santis
Robin J. Beaman*
Affiliation:
James Cook University, PO Box 6811, Cairns, QLD 4870, Australia
Philip E. O’Brien
Affiliation:
Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia
Alexandra L. Post
Affiliation:
Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia
Laura De Santis
Affiliation:
Istituto Nazionale di Oceanografia edi Geofisica Sperimentale, Sgonico 34010, Italy
*
robin.beaman@jcu.edu.au
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Abstract

The Collaborative East Antarctic Marine Census (CEAMARC) surveys to the Terre Adélie and George V continental margin highlight the requirement for a revised high-resolution bathymetry model that can be used as a spatial tool for improving information on the physical environment of the region. We have combined shiptrack singlebeam and multibeam bathymetry, coastline data, and land and ice sheet topographic data to develop a new regional-scale bathymetry grid, called GVdem (short for George V digital elevation model). The GVdem grid spans an area between 138–148°E and 63–69°S, with a cell pixel size of 0.001-arcdegree (c. 100 m). The revised digital elevation model is a large improvement over previously available regional-scale grids from the area, and highlights seabed physiographic detail not formerly observed in this part of East Antarctica. In particular, the extent and complexity of the rugged inner-shelf valleys are revealed, and their spatial relationship with large shelf basins and adjacent flat-topped banks. The new grid also reveals further insight into the spatial distribution of the submarine canyons found on the continental slope.

Keywords

CEAMARCgeomorphologyhabitatmultibeam sonarsinglebeam echosounder

Information

Type
Earth Sciences
Information
Antarctic Science , Volume 23 , Issue 1 , February 2011 , pp. 95 - 103
Copyright
Copyright © Antarctic Science Ltd 2011

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References

Amante, C. Eakins, B.W. 2008. ETOPO1 1 Arc-minute global relief model: procedures, data sources and analysis. Boulder, CO: National Geophysical Data Center, NESDIS, National Oceanic and Atmospheric Administration, US Department of Commerce, 21 pp.Google Scholar
Barclay, A.H., Wilcock, W.S.D. Ibanez, J.M. 2009. Bathymetric constraints on the tectonic and volcanic evolution of Deception Island volcano, South Shetland Islands. Antarctic Science, 21, 153–167.CrossRefGoogle Scholar
Beaman, R.J. Harris, P.T. 2003. Seafloor morphology and acoustic facies of the George V Land shelf. Deep-Sea Research II, 50, 1343–1355.CrossRefGoogle Scholar
Beaman, R.J. Harris, P.T. 2005. Bioregionalisation of the George V Shelf, East Antarctica. Continental Shelf Research, 25, 1657–1691.CrossRefGoogle Scholar
Becker, J.J., Sandwell, D.T., Smith, W.H.F., Braud, J., Binder, B., Depner, J., Fabre, D., Factor, J., Ingalls, S., Kim, S.-H., Ladner, R., Marks, K., Nelson, S., Pharaoh, A., Trimmer, R., von Rosenberg, J., Wallace, G. Weatherall, P. 2009. Global bathymetry and elevation data at 30 arc seconds resolution: SRTM30 PLUS. Marine Geodesy, 32, 355–371.CrossRefGoogle Scholar
Bolmer, S.T. 2008. A note on the development of the bathymetry of the continental margin west of the Antarctic Peninsula from 65° to 71°S and 65° to 78°W. Deep-Sea Research II, 55, 271–276.CrossRefGoogle Scholar
Caburlotto, A., De Santis, L., Zanolla, C., Camerlenghi, A. Dix, J.K. 2006. New insights into Quaternary glacial dynamic changes on the George V Land continental margin (East Antarctica). Quaternary Science Reviews, 25, 3029–3049.CrossRefGoogle Scholar
Caress, D.W. Chayes, D.N. 1996. Improved processing of Hydrosweep DS multibeam data on the R/V Maurice Ewing. Marine Geophysical Researches, 18, 631–650.CrossRefGoogle Scholar
De Santis, L., Brancolini, G. Donda, F. 2003. Seismo-stratigraphic analysis of the Wilkes Land continental margin (East Antarctica): influence of glacially driven processes on the Cenozoic deposition. Deep-Sea Research II, 50, 1563–1594.CrossRefGoogle Scholar
Domack, E.W., Jull, A.J.T., Anderson, J.B., Linick, T.W. Williams, C.R. 1989. Application of tandem accelerator mass-spectrometer dating to Late Pleistocene-Holocene sediments of the East Antarctic continental shelf. Quaternary Research, 31, 277–287.CrossRefGoogle Scholar
Domack, E., Amblas, D., Gilbert, R., Brachfeld, S., Camerlenghi, A., Rebesco, M., Canals, M. Urgeles, R. 2006. Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula. Geomorphology, 75, 125–142.Google Scholar
Donda, F., Brancolini, G., de Santis, L. Trincardi, F. 2003. Seismic facies and sedimentary processes on the continental rise off Wilkes Land (East Antarctica): evidence of bottom current activity. Deep-Sea Research II, 50, 1509–1527.CrossRefGoogle Scholar
Dowdeswell, J.A. Bamber, J.L. 2007. Keel depths of modern Antarctic icebergs and implications for sea-floor scouring in the geological record. Marine Geology, 243, 120–131.CrossRefGoogle Scholar
Dowdeswell, J.A., Ottesen, D., Evans, J., O’Cofaigh, C. Anderson, J.B. 2008a. Submarine glacial landforms and rates of ice-stream collapse. Geology, 36, 819–822.CrossRefGoogle Scholar
Dowdeswell, J.A., O’Cofaigh, C., Noormets, R., Larter, R.D., Hillenbrand, C.-D., Benetti, S., Evans, J. Pudsey, C.J. 2008b. A major trough-mouth fan on the continental margin of the Bellingshausen Sea, West Antarctica: the Belgica Fan. Marine Geology, 252, 129–140.CrossRefGoogle Scholar
Evans, J., Pudsey, C.J., O’Cofaigh, C., Morris, P. Domack, E. 2005. Late Quaternary glacial history, flow dynamics and sedimentation along the eastern margin of the Antarctic Peninsula ice sheet. Quarternary Science Reviews, 24, 741–774.CrossRefGoogle Scholar
Fretwell, P.T., Tate, A.J., Deen, T.J. Belcher, M. 2009. Compilation of a new bathymetric dataset of South Georgia. Antarctic Science, 21, 171–174.CrossRefGoogle Scholar
Gutt, J. Starmans, A. 1998. Structure and biodiversity of megabenthos in the Weddell and Lazarev seas (Antarctica): ecological role of physical parameters and biological interactions. Polar Biology, 20, 229–247.CrossRefGoogle Scholar
Harris, P.T. O’Brien, P.E. 1998. Bottom currents, sedimentation and ice sheet retreat facies successions on the Mac Robertson shelf, East Antarctica. Marine Geology, 151, 47–72.CrossRefGoogle Scholar
Harris, P.T., Brancolini, G., Armand, L., Brusetti, M., Beaman, R.J., Giorgetti, G., Presti, M. Trincardi, F. 2001. Continental shelf drift deposit indicates non-steady state Antarctic bottom water production in the Holocene. Marine Geology, 179, 1–8.CrossRefGoogle Scholar
Heroy, D.C. Anderson, J.B. 2005. Ice sheet extent of the Antarctic Peninsula region during the Last Glacial Maximum (LGM) - insights from glacial geomorphology. Geological Society of America Bulletin, 117, 1497–1512.Google Scholar
Hutchinson, M.F. 1989. A new proceedure for gridding elevation and streamline data with automatic removal of spurious pits. Journal of Hydrology, 106, 211–232.CrossRefGoogle Scholar
IHO 2008. IHO standards for hydrographic surveys (5th edition). Monaco: International Hydrographic Bureau, 36 pp.Google Scholar
IOC, IHO & BODC 2003. Centenary edition of the GEBCO digital atlas. Liverpool: British Oceanographic Data Centre. [Digital media.]Google Scholar
Larter, R.D., Graham, A.G.C., Gohl, K., Kuhn, G., Hillenbrand, C.-D., Smith, J.A., Deen, T.J., Livermore, R.A. Schenke, H.-W. 2009. Subglacial bedforms reveal complex basal regime in a zone of paleo-ice stream convergence, Amundsen Sea embayment, West Antarctica. Geology, 37, 411–414.CrossRefGoogle Scholar
Liu, H., Jezek, K., Li, B. Zhao, Z. 2001. Radarsat Antarctic Mapping Project digital elevation model, version 2. Boulder, CO: National Snow and Ice Data Center. [Digital media.].Google Scholar
Lythe, M.B. Vaughan, D.G. & the BEDMAP Consortium. 2000. BEDMAP-bed topography of the Antarctic. 1:10 000 000 scale map. BAS (Misc) 9. Cambridge: British Antarctic Survey.Google Scholar
Massom, R.A. 2003. Recent iceberg calving events in the Ninnis Glacier region, East Antarctica. Antarctic Science, 15, 303–313.CrossRefGoogle Scholar
McMullen, K., Domack, E., Leventer, A., Olsen, C., Dunbar, R. Brachfield, S. 2006. Glacial morphology and sediment formation in the Mertz Trough, East Antarctica. Palaeogeography, Palaeoclimatology, Palaeoecology, 231, 169–180.CrossRefGoogle Scholar
Nitsche, F.O., Jacobs, S.S., Larter, R.D. Gohl, K. 2007. Bathymetry of the Amundsen Sea continental shelf: implications for geology, oceanography and glaciology. Geochemistry Geophysics Geosystems, 8, 1–10.Google Scholar
Noormets, R., Dowdeswell, J.A., Larter, R.D., O’Cofaigh, C. Evans, J. 2009. Morphology of the upper continental slope in the Bellingshausen and Amundsen seas – implications for sedimentary processes at the shelf edge of West Antarctica. Marine Geology, 258, 100–114.CrossRefGoogle Scholar
O’Cofaigh, C., Dowdeswell, J.A., Allen, C.S., Hiemstra, J.F., Pudsey, C.J., Evans, J. Evans, D.J.A. 2005. Flow dynamics and till genesis associated with a marine-based Antarctic palaeo-ice stream. Quarternary Science Reviews, 24, 709–740.CrossRefGoogle Scholar
Porter-Smith, R. 2003. Bathymetry of the George Vth Land shelf and slope. Deep-Sea Research II, 50, 1337–1341.CrossRefGoogle Scholar
Post, A.L., O’Brien, P.E., Beaman, R.J., Riddle, M.J. de Santis, L. 2010. Physical controls on deep water coral communities on the George V Land slope, East Antarctica. Antarctic Science, 22, 371–378.Google Scholar
Smith, J.A., Hillenbrand, C.-D., Larter, R.D., Graham, A.G.C. Kuhn, G. 2009. The sediment infill of subglacial meltwater channels on the West Antarctic continental shelf. Quaternary Research, 71, 190–200.CrossRefGoogle Scholar
Smith, W.H.F. Sandwell, D.T. 1997. Global sea floor topography from satellite altimetry and ship depth soundings. Science, 277, 1956–1962.Google Scholar
Teixido, N., Garrabou, J. Arntz, W.E. 2002. Spatial pattern quantification of Antarctic benthic communities using landscape indices. Marine Ecology Progress Series, 242, 1–14.Google Scholar
Wellner, J.S., Heroy, D.C. Anderson, J.B. 2006. The death mask of the Antarctic ice sheet: Comparison of glacial geomorphic features across the continental shelf. Geomorphology, 75, 157–171.CrossRefGoogle Scholar