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A high-resolution synthetic bed elevation grid of the Antarctic continent


Graham, FS and Roberts, JL and Galton-Fenzi, BK and Young, D and Blankenship, D and Siegert, MJ, A high-resolution synthetic bed elevation grid of the Antarctic continent, Earth System Science Data, 9 pp. 267-279. ISSN 1866-3508 (2017) [Refereed Article]


Copyright Statement

Author(s) 2017. Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0)

DOI: doi:10.5194/essd-9-267-2017


Digital elevation models of Antarctic bed topography are smoothed and interpolated onto low-resolution ( > 1 km) grids as current observed topography data are generally sparsely and unevenly sampled. This issue has potential implications for numerical simulations of ice-sheet dynamics, especially in regions prone to instability where detailed knowledge of the topography, including fine-scale roughness, is required. Here, we present a high-resolution (100 m) synthetic bed elevation terrain for Antarctica, encompassing the continent, continental shelf, and seas south of 60 S. Although not identically matching observations, the synthetic bed surface denoted as HRES preserves topographic roughness characteristics of airborne and ground-based ice-penetrating radar data measured by the ICECAP (Investigating the Cryospheric Evolution of the Central Antarctic Plate) consortium or used to create the Bedmap1 compilation. Broad-scale ( > 5 km resolution) features of the Antarctic landscape are incorporated using a low-pass filter of the Bedmap2 bed elevation data. HRES has applicability in high-resolution ice-sheet modelling studies, including investigations of the interaction between topography, ice-sheet dynamics, and hydrology, where processes are highly sensitive to bed elevations and fine-scale roughness. The data are available for download from the Australian Antarctic Data Centre (doi:10.4225/15/57464ADE22F50).

Item Details

Item Type:Refereed Article
Keywords:high resolution Antarctic bed topography, Antarctica, Bedmap2
Research Division:Engineering
Research Group:Fluid mechanics and thermal engineering
Research Field:Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:Graham, FS (Dr Felicity McCormack)
UTAS Author:Roberts, JL (Dr Jason Roberts)
UTAS Author:Galton-Fenzi, BK (Dr Ben Galton-Fenzi)
ID Code:116815
Year Published:2017
Web of Science® Times Cited:11
Deposited By:Oceans and Cryosphere
Deposited On:2017-05-23
Last Modified:2018-05-24
Downloads:124 View Download Statistics

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