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Bed topography of Princess Elizabeth Land in East Antarctica

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Cui, X, Jeofry, H, Greenbaum, JS, Guo, J, Li, L, Lindzey, LE, Habbal, FA, Wei, W, Young, DA, Ross, N, Morlighem, M, Jong, LM ORCID: 0000-0001-6707-570X, Roberts, JL, Blankenship, DD, Bo, S and Siegert, MJ 2020 , 'Bed topography of Princess Elizabeth Land in East Antarctica' , Earth System Science Data, vol. 12, no. 4 , pp. 2765-2774 , doi: 10.5194/essd-12-2765-2020.

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Abstract

We present a topographic digital elevation model (DEM) for PrincessElizabeth Land (PEL), East Antarctica. The DEM covers an area of∼900 000 km2 and was built from radio-echosounding data collected during four campaigns since 2015. Previously, togenerate the Bedmap2 topographic product, PEL's bed was characterized fromlow-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 (>30 m 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 BedMachineAntarctica and Bedmap2, this new bed DEM completes the first-ordermeasurement 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 Type: Article
Authors/Creators: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
Keywords: Antarctic bedrock
Journal or Publication Title: Earth System Science Data
Publisher: Copernicus GmbH
ISSN: 1866-3508
DOI / ID Number: 10.5194/essd-12-2765-2020
Copyright Information:

Copyright Author(s) 2020. This work is distributed underthe Creative Commons Attribution 4.0 License.

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