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A high-resolution synthetic bed elevation grid of the Antarctic continent
Citation
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]
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Copyright Statement
© Author(s) 2017. Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/
DOI: doi:10.5194/essd-9-267-2017
Abstract
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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