Bed topography of Princess Elizabeth Land in East Antarctica

We present a topographic digital elevation model (DEM) for Princess Elizabeth Land (PEL), East Antarctica. The DEM covers an area of ∼900 000 km2 and was built from radio-echo sounding data collected during four campaigns since 2015. Previously, to generate the Bedmap2 topographic product, PEL'...

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Bibliographic Details
Published in:Earth system science data 2020-11, Vol.12 (4), p.2765-2774
Main Authors: Cui, Xiangbin, Jeofry, Hafeez, Greenbaum, Jamin S, Guo, Jingxue, Li, Lin, Lindzey, Laura E, Habbal, Feras A, Wei, Wei, Young, Duncan A, Ross, Neil, Morlighem, Mathieu, Jong, Lenneke M, Roberts, Jason L, Blankenship, Donald D, Bo, Sun, Siegert, Martin J
Format: Article
Language:English
Subjects:
Aircraft
Conservation
Data processing
Diffusion rate
Digital Elevation Models
Echo sounding
Echoes
Elevation
Flow velocity
Glaciation
Gravity data
Ice
Ice cover
Ice sheets
Ice thickness
Interferometry
Streamlines
Thickness
Topographic databases
Topography
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Summary:We present a topographic digital elevation model (DEM) for Princess Elizabeth Land (PEL), East Antarctica. The DEM covers an area of ∼900 000 km2 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 (>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 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).
ISSN:1866-3516
1866-3508
1866-3516
DOI:10.5194/essd-12-2765-2020