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Bathymetry and Ice draft maps for the Amery Ice Shelf cavity
Entry ID: AIS_GEOM

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Summary
Abstract: 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.

Related URL
Link: GET DATA
Description: Download point for the data - text files


Link: VIEW RELATED INFORMATION
Description: Citation reference for this metadata record and dataset


Geographic Coverage
 N: -66.0 S: -73.6  E: 79.0  W: 66.0
 Min Depth: 0 M  Max Depth: 3500 M

Data Set Citation
Dataset Originator/Creator: Galton-Fenzi, B.K., Coleman, R. and Maraldi, C.
Dataset Title: Bathymetry and Ice draft maps for the Amery Ice Shelf cavity
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2012-05-04
Dataset Publisher: Australian Antarctic Data Centre
Online Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...


Temporal Coverage
Start Date: 1950-01-01
Stop Date: 2006-04-01


Location Keywords
OCEAN > SOUTHERN OCEAN
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Data Resolution
Vertical Resolution: 50 m


Science Keywords
CRYOSPHERE >SNOW/ICE >ICE DEPTH/THICKNESS    [Definition]
OCEANS >BATHYMETRY/SEAFLOOR TOPOGRAPHY >BATHYMETRY    [Definition]
CRYOSPHERE >FROZEN GROUND >GROUND ICE    [Definition]


ISO Topic Category
OCEANS


Platform
Aircraft    [Information]
SHIPS    [Information]


Instrument
TIDE GAUGES    [Information]
GPS >Global Positioning System    [Information]
AIRSAR >Airborne Synthetic Aperture Radar    [Information]
SEISMIC REFLECTION PROFILERS    [Information]
SEISMOGRAPHS    [Information]
Seismometers    [Information]
IFSAR >Interferometric Synthetic Aperture Radar


Quality
The data were gridded onto a WGS84 projection with a 2x2 km resolution.
Horizontal datum: WGS84 Vertical datum: Mean sea level


Access Constraints
These data are publicly available for download from the provided URL.


Use Constraints
This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

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.


Keywords
Amery Ice Shelf
Ice Draft
Grounding line


Data Set Progress
COMPLETE


Originating Center
ACE CRC


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 4.7 MB
Distribution_Format: text, pdf
Fees: free


Personnel
BEN K GALTON-FENZI
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6226 2251
Fax: +61 3 6226 2973
Email: bkgalton at utas.edu.au
Contact Address:
ACE CRC
Private bag 80
City: Hobart
Province or State: Tasmania
Postal Code: 7001
Country: Australia


RICHARD COLEMAN
Role: TECHNICAL CONTACT
Phone: +61 3 6226 2108
Fax: +61 3 6224 0282
Email: Richard.Coleman at utas.edu.au
Contact Address:
Centre for Spatial Information Science
School of Geography and Environmental Studies
University of Tasmania
Private Bag 76
City: Hobart
Province or State: Tasmania
Postal Code: 7001
Country: Australia


CLAIRE MARALDI
Role: TECHNICAL CONTACT
Email: maraldi at notos.cst.cnes.fr


Publications/References
Galton-Fenzi, B. K., C. Maraldi, R. Coleman and J. Hunter (2007), The Geometry of the cavity beneath the Amery Ice Shelf, East Antarctica, Geophys. Res. Lett.

Maraldi, C., B. Galton-Fenzi, F. Lyard, and L. Testut (2007), Barotropic Tides of the Southern Indian Ocean and the Amery Ice Shelf Cavity, Geophys. Res. Lett., doi:10.1029/2007GL030900, in press

Creation and Review Dates
DIF Creation Date: 2007-08-23
Last DIF Revision Date: 2016-01-27



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