Swath sonar bathymetry during POLARSTERN cruise ARK-VII/3a (PS17) with links to multibeam raw data files
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2011
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| _version_ | 1867169983491997696 |
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| author | Schenke, Hans Werner Niederjasper, Fred Monk, Jürgen Dreyer, Johannes Laing, Ralf Voelker, Karsten |
| author_facet | Schenke, Hans Werner Niederjasper, Fred Monk, Jürgen Dreyer, Johannes Laing, Ralf Voelker, Karsten |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In multibeam echosounder and subbottom profiler data acquired during R/V Polarstern cruise ARK-VII/3a from the Hovgaard Ridge (Fram Strait), we found evidence for very deep (>1200 m) iceberg scouring. Five elongated seafloor features have been detected that are interpreted to be iceberg scours. The scours are oriented in north-south/south-north direction and are about 15 m deep, 300 m wide, and 4 km long crossing the entire width of the ridge. They are attributed to multiple giant paleo-icebergs that most probably left the Arctic Ocean southward through Fram Strait. The huge keel depths are indicative of ice sheets extending into the Arctic Ocean being at least 1200 m thick at the calving front during glacial maxima. The deep St. Anna Trough or grounded ice observed at the East Siberian Continental Margin are likely source regions of these icebergs that delivered freshwater to the Nordic Seas. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_767608 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Swath sonar bathymetry during POLARSTERN cruise ARK-VII/3a (PS17) with links to multibeam raw data files Schenke, Hans Werner Niederjasper, Fred Monk, Jürgen Dreyer, Johannes Laing, Ralf Voelker, Karsten ARK-VII/3a; AWI_Paleo; CT; DATE/TIME; LATITUDE; LONGITUDE; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS17; PS17/3a-track; Swath-mapping system Atlas Hydrosweep DS-1; Underway cruise track measurements; Uniform resource locator/link to raw data file In multibeam echosounder and subbottom profiler data acquired during R/V Polarstern cruise ARK-VII/3a from the Hovgaard Ridge (Fram Strait), we found evidence for very deep (>1200 m) iceberg scouring. Five elongated seafloor features have been detected that are interpreted to be iceberg scours. The scours are oriented in north-south/south-north direction and are about 15 m deep, 300 m wide, and 4 km long crossing the entire width of the ridge. They are attributed to multiple giant paleo-icebergs that most probably left the Arctic Ocean southward through Fram Strait. The huge keel depths are indicative of ice sheets extending into the Arctic Ocean being at least 1200 m thick at the calving front during glacial maxima. The deep St. Anna Trough or grounded ice observed at the East Siberian Continental Margin are likely source regions of these icebergs that delivered freshwater to the Nordic Seas. |
| title | Swath sonar bathymetry during POLARSTERN cruise ARK-VII/3a (PS17) with links to multibeam raw data files |
| topic | ARK-VII/3a; AWI_Paleo; CT; DATE/TIME; LATITUDE; LONGITUDE; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS17; PS17/3a-track; Swath-mapping system Atlas Hydrosweep DS-1; Underway cruise track measurements; Uniform resource locator/link to raw data file |
| url | https://doi.org/10.1594/PANGAEA.767608 |