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Bed topography of Princess Elizabeth Land in East Antarctica

Citation

Cui, X and Jeofry, H and Greenbaum, JS and Guo, J and Li, L and Lindzey, LE and Habbal, FA and Wei, W and Young, DA and Ross, N and Morlighem, M and Jong, LM and Roberts, JL and Blankenship, DD and Bo, S and Siegert, MJ, Bed topography of Princess Elizabeth Land in East Antarctica, Earth System Science Data, 12, (4) pp. 2765-2774. ISSN 1866-3508 (2020) [Refereed Article]


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DOI: doi:10.5194/essd-12-2765-2020

Abstract

We present a topographic digital elevation model (DEM) for Princess Elizabeth Land (PEL), East Antarctica. The DEM covers an area of ∼900 000km2 and was built from radio-echo sounding data collected during four campaigns since 2015. Previously, to generate the Bedmap2 topographic product, PEL's bed was characterized from low-resolution satellite gravity data across an otherwise large (>200 km wide) data-free zone. We use the mass conservation (MC) method to produce an ice thickness grid across faster flowing (>30m yr−1) regions of the ice sheet and streamline diffusion in slower flowing areas. The resulting ice thickness model is integrated with an ice surface model to build the bed DEM. Together with BedMachine Antarctica and Bedmap2, this new bed DEM completes the first-order measurement of subglacial continental Antarctica – an international mission that began around 70 years ago. The ice thickness data and bed DEMs of PEL (resolved horizontally at 500 m relative to ice surface elevations obtained from the Reference Elevation Model of Antarctica – REMA) are accessible from https://doi.org/10.5281/zenodo.4023343 (Cui et al., 2020a) and https://doi.org/10.5281/zenodo.4023393 (Cui et al., 2020b).

Item Details

Item Type:Refereed Article
Keywords:Antarctic bedrock
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Applied geophysics
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Antarctic and Southern Ocean ice dynamics
UTAS Author:Jong, LM (Dr Lenneke Jong)
UTAS Author:Roberts, JL (Dr Jason Roberts)
ID Code:142752
Year Published:2020
Deposited By:Oceans and Cryosphere
Deposited On:2021-02-10
Last Modified:2021-02-24
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