Data

Bathymetry and Ice draft maps for the Amery Ice Shelf cavity

Australian Antarctic Data Centre
GALTON-FENZI, BEN K ; COLEMAN, RICHARD ; MARALDI, CLAIRE
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26179/5c8f2263724e4&rft.title=Bathymetry and Ice draft maps for the Amery Ice Shelf cavity&rft.identifier=10.26179/5c8f2263724e4&rft.publisher=Australian Antarctic Data Centre&rft.description=Ocean circulation beneath ice shelves and associated rates of melting and freezing are influenced strongly by water column thickness and depth. The shape of the cavity beneath the Amery Ice Shelf is important for our understanding of ice shelf stability and freshwater input to the ocean and their dependence on climate. New seismic surveys of the centre region of the Amery Ice Shelf and ice-draft data taken at the grounding line has provided a considerable amount of new water-column thickness and bathymetry data. The data is adjusted in the unknown region south of 71 degrees 35 minutes S by comparing the complex error between simulated tides against in situ GPS observations. A finite element, hydrodynamic ocean tide model is used to simulate the 4 major constituents (S2, M2, K1 and O1). The new data differs from a previous bathymetry map in a number of places. Significantly, there is channel that leads from the Prydz bay depression into the deepest part of the AIS cavity in the south through a series of depressions. This technique has particular application when the water column beneath ice shelves is inaccessible and in situ GPS data is available.&rft.creator=GALTON-FENZI, BEN K &rft.creator=COLEMAN, RICHARD &rft.creator=MARALDI, CLAIRE &rft.date=2007&rft.coverage=northlimit=-66; southlimit=-73.6; westlimit=66; eastLimit=79; projection=WGS84&rft.coverage=northlimit=-66; southlimit=-73.6; westlimit=66; eastLimit=79; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AIS_GEOM when using these data.&rft_subject=oceans&rft_subject=ICE DEPTH/THICKNESS&rft_subject=EARTH SCIENCE&rft_subject=CRYOSPHERE&rft_subject=SNOW/ICE&rft_subject=BATHYMETRY&rft_subject=OCEANS&rft_subject=BATHYMETRY/SEAFLOOR TOPOGRAPHY&rft_subject=GROUND ICE&rft_subject=FROZEN GROUND&rft_subject=Amery Ice Shelf&rft_subject=Ice Draft&rft_subject=Grounding line&rft_subject=TIDE GAUGES&rft_subject=GPS > Global Positioning System&rft_subject=AIRSAR > Airborne Synthetic Aperture Radar&rft_subject=SEISMIC REFLECTION PROFILERS&rft_subject=SEISMOGRAPHS&rft_subject=Seismometers&rft_subject=IFSAR > Interferometric Synthetic Aperture Radar&rft_subject=Aircraft&rft_subject=SHIPS&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=CONTINENT > ANTARCTICA&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AIS_GEOM when using these data.

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Brief description

Ocean circulation beneath ice shelves and associated rates of melting and freezing are influenced strongly by water column thickness and depth. The shape of the cavity beneath the Amery Ice Shelf is important for our understanding of ice shelf stability and freshwater input to the ocean and their dependence on climate. New seismic surveys of the centre region of the Amery Ice Shelf and ice-draft data taken at the grounding line has provided a considerable amount of new water-column thickness and bathymetry data. The data is adjusted in the unknown region south of 71 degrees 35 minutes S by comparing the complex error between simulated tides against in situ GPS observations. A finite element, hydrodynamic ocean tide model is used to simulate the 4 major constituents (S2, M2, K1 and O1). The new data differs from a previous bathymetry map in a number of places. Significantly, there is channel that leads from the Prydz bay depression into the deepest part of the AIS cavity in the south through a series of depressions. This technique has particular application when the water column beneath ice shelves is inaccessible and in situ GPS data is available.

Issued: 2007-08-23

Data time period: 1950-01-01 to 2006-04-01

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79,-66 79,-73.6 66,-73.6 66,-66 79,-66

72.5,-69.8

text: northlimit=-66; southlimit=-73.6; westlimit=66; eastLimit=79; projection=WGS84

Subjects
AIRSAR > Airborne Synthetic Aperture Radar | Aircraft | Amery Ice Shelf | BATHYMETRY | BATHYMETRY/SEAFLOOR TOPOGRAPHY | CONTINENT > ANTARCTICA | CRYOSPHERE | EARTH SCIENCE | FROZEN GROUND | GEOGRAPHIC REGION > POLAR | GPS > Global Positioning System | GROUND ICE | Grounding line | ICE DEPTH/THICKNESS | IFSAR > Interferometric Synthetic Aperture Radar | Ice Draft | OCEAN > SOUTHERN OCEAN | OCEANS | SEISMIC REFLECTION PROFILERS | SEISMOGRAPHS | SHIPS | SNOW/ICE | Seismometers | TIDE GAUGES | oceans |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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