Antarctic Snow Megadune Morphology from GPR and GPS Surveys

GPR and GPS data capture the internal layering and surface characteristics of snow megadunes across a 60 km² study area on the East Antarctic Plateau. The dataset was collected during two field seasons in 2002 and 2003-2004 by researchers from the AMD_USAPDC. It aims to refine models of dune formation and assess their impact on paleoclimate records derived from ice cores.

Use Cases

• Model megadune formation by correlating GPR-derived internal layering structures with GPS-measured surface topography.
• Calibrate satellite-derived elevation models using precise GPS coordinate data from the survey area.
• Analyze the relationship between wind direction (from katabatic wind models) and the orientation of glaze versus sastrugi surface patterns visible in GPR imagery.
• Assess the potential bias in ice core climate proxies by studying isotopic and chemical variations across dune features documented in the research objectives.

Strengths

• Data covers a 60 km² area, providing spatial context for megadune features.
• Combines two complementary data types: GPR for subsurface structure and GPS for precise surface location.

Limitations

• Data collection occurred over two brief field seasons, ending in January 2004, limiting temporal analysis.
• GPR data is provided in JPEG format, which may lack the raw signal data needed for advanced quantitative analysis.
• The specific row count and file sizes for the GPS and GPR data are unknown.

Provenance

Source

AMD_USAPDC via NASA Earthdata.

Collection Method

Field measurements using ground penetrating radar (GPR) and global positioning system (GPS) equipment.

Time Range

Field seasons in November 2002 and December 2003 through January 2004.

Freshness

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Geography

East Antarctic Plateau, southeast of Vostok station, within a 60 km² area.