OMG: Ship-Based Bathymetry of Greenland's Glacier Fjords

The Oceans Melting Greenland (OMG) project collected in situ depth measurements around ocean-terminating glaciers of Greenland using a ship-based Multibeam Echo Sounder System (MBES). This Level 2 dataset provides gridded bathymetry data, supplemented by Singlebeam Echo Sounder (SBES) measurements in areas inaccessible to the MBES, to map seafloor topography and investigate oceanic contributions to glacial melt. Data collection tracks are irregularly patterned due to navigational constraints from floating ice, ice cover, and weather conditions.

Use Cases

• Modeling ocean heat transport and glacial melt rates based on fjord bathymetry and depth measurements.
• Mapping seafloor topography and submarine glacial troughs using multibeam echo sounder data.
• Assessing navigational hazards and ice conditions for future Arctic research campaigns based on ship track patterns.
• Calibrating and validating satellite-derived bathymetry or ice thickness models with in situ depth points.

Strengths

• Data originates from the NASA-led Oceans Melting Greenland (OMG) project, a focused scientific mission.
• Includes complementary Singlebeam Echo Sounder (SBES) data to fill gaps where the primary Multibeam system could not operate.
• Cross-platform presence on Data.gov and NASA Earthdata signals institutional importance and reliability.

Limitations

• Critical metadata is missing: no column names, row counts, or file sizes are provided on any platform.
• Conflicting 'last updated' dates exist between sources (2026 on Data.gov vs. 2021 on NASA Earthdata), raising questions about data freshness.
• Spatial coverage is inherently limited and irregular due to ship navigation constraints around ice and glaciers.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

In situ depth measurements collected from a ship using Multibeam Echo Sounder System (MBES) and Singlebeam Echo Sounder System (SBES) instruments.

Time Range

null

Freshness

2026-04 09 (Data.gov), but conflicting with 2021-08-31 (NASA Earthdata).

Geography

Fjords around ocean-terminating glaciers of Greenland.