| Information | |
|---|---|
| DOI | 10.5067/OMGEV-BTYSS |
| Short Name | OMG_Bathy |
| Long Name | OMG Bathymetry MBES Data |
| Description | Global sea level rise will be one of the major environmental challenges of the 21st Century. Oceans Melting Greenland (OMG) will pave the way for improved estimates of sea level rise by addressing the question: To what extent are the oceans melting Greenland’s ice from below? Over a five-year campaign, OMG will observe changing water temperatures on the continental shelf surrounding Greenland, and how marine glaciers react to the presence of warm, salty Atlantic Water. The complicated geometry of the sea floor steers currents on the shelf and often determines whether Atlantic Water can reach into the long narrow fjords and interact with the coastal glaciers. Because knowledge of these pathways is a critical component of modeling the interaction between the oceans and ice sheet, OMG will facilitate improved measurements of the shape and depth of the sea floor in key regions as well. The bathymetry survey was conducted using multi-swath Multibeam Echo Sounder System (MBES) equipment and procedures. MBES uses a sonar that produces an angular swath of beams to the port and starboard side in a single ping to effectively map a corridor with a width approximately 3-4 times the water depth. In addition to the multibeam echosounder, several more instruments are required on the vessel to georeference the raw multibeam data into corrected soundings. A GPS installed on the vessel is used to accurately position the location of the multibeam. Data from a pitch, roll, heave and heading sensor is used to correct the raw sounding based on the vessels attitude at the time the sonar ping. The sound velocity of the water column is required to convert the soundings from raw time-of-flight measurements to a corrected range as well as correct the sounding for refraction as it passes through the water column. |
| Version | 0.1 |
| Measurement |
Oceans > Bathymetry/Seafloor Topography > Bathymetry Oceans > Bathymetry/Seafloor Topography > Seafloor Topography Oceans > Bathymetry/Seafloor Topography > Water Depth |
| Platform | M/V Cape Race vessel operated by TerraSond Limited |
| Sensor | Teledyne Reson SeaBat 7160 Multibeam Echo Sounder System (MBES) |
| Project | Oceans Melting Greenland (OMG) |
| Data Access | |
|---|---|
| Portal | OMG Bathymetry MBES Level 2 Gridded Data |
| Format | ASCII XYZ |
| Citation | |
|---|---|
| Citation | OMG Mission. 2016. Bathymetry (sea floor depth) data from the ship-based bathymetry survey. Ver. 0.1. OMG SDS, CA, USA. Dataset accessed [YYYY-MM-DD] at http://dx.doi.org/10.5067/OMGEV-BTYSS. |
