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Description

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains a bed topography and bathymetry map of Antarctica. Bed topography is deduced by subtracting ice thickness from the surface elevation; using Ice Flow Perturbation Analysis (IFPA); and by other methods. Surface elevations are obtained from the Reference Elevation Model of Antarctica (REMA) and high-resolution satellite maps.

Version Description

Changes for this version include: - Uses ice flow perturbation analysis to map the bed in the interior - Uses ice thickness estimates from IceBoost, for periphery glaciers and Peninsula - Use ocean bathymetry from AntGG along parts of the coast and IBCSO v2 - Includes a new field 'RGI' that indicates pixels which belong to glaciers in the Randolph Glacier Inventory

Product Summary

Platforms
MODELS
Instruments
NOT APPLICABLE
Spatial Extent

N: -53 S: -90 E: 180 W: -180

Spatial Resolution
500 Meters x 500 Meters
Location
ANTARCTICA
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1970-01-01 to 2019-10-01
Concept ID
C3973022985-NSIDC_CPRD
Data State
COMPLETE
Number of Files/Granules
1
Processing Level
4
Published
Science Keywords
Bathymetry ,
Bed Elevation ,
Firn Air Content ,
Glacier/Ice Sheet Thickness ,
Terrain Elevation

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Morlighem, M. (2025). MEaSUREs BedMachine Antarctica, Version 4 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/POJQI54A45HX Date Accessed: 2026-01-29

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