Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean
In multibeam echosounder and sub-bottom profiler data acquired during RV 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. T...
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Online Access: | https://epic.awi.de/id/eprint/33401/ http://onlinelibrary.wiley.com/doi/10.1002/2014GL060267/abstract https://hdl.handle.net/10013/epic.44139 |
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ftawi:oai:epic.awi.de:33401 2024-09-15T17:51:21+00:00 Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean Arndt, Jan Erik Niessen, Frank Jokat, Wilfried Dorschel, Boris 2014-07-28 https://epic.awi.de/id/eprint/33401/ http://onlinelibrary.wiley.com/doi/10.1002/2014GL060267/abstract https://hdl.handle.net/10013/epic.44139 unknown Wiley Arndt, J. E. orcid:0000-0002-9413-1612 , Niessen, F. orcid:0000-0001-6453-0594 , Jokat, W. orcid:0000-0002-7793-5854 and Dorschel, B. orcid:0000-0002-3495-5927 (2014) Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean , Geophysical Research Letters, 41 (14), pp. 5068-5074 . doi:10.1002/2014GL060267 <https://doi.org/10.1002/2014GL060267> , hdl:10013/epic.44139 EPIC3Geophysical Research Letters, Wiley, 41(14), pp. 5068-5074, ISSN: 0094-8276 Article isiRev 2014 ftawi https://doi.org/10.1002/2014GL060267 2024-06-24T04:07:26Z In multibeam echosounder and sub-bottom profiler data acquired during RV 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 palaeo-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. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Iceberg* Nordic Seas Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geophysical Research Letters 41 14 5068 5074 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In multibeam echosounder and sub-bottom profiler data acquired during RV 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 palaeo-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 |
Article in Journal/Newspaper |
author |
Arndt, Jan Erik Niessen, Frank Jokat, Wilfried Dorschel, Boris |
spellingShingle |
Arndt, Jan Erik Niessen, Frank Jokat, Wilfried Dorschel, Boris Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean |
author_facet |
Arndt, Jan Erik Niessen, Frank Jokat, Wilfried Dorschel, Boris |
author_sort |
Arndt, Jan Erik |
title |
Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean |
title_short |
Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean |
title_full |
Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean |
title_fullStr |
Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean |
title_full_unstemmed |
Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean |
title_sort |
deep water paleo-iceberg scouring on top of hovgaard ridge–arctic ocean |
publisher |
Wiley |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/33401/ http://onlinelibrary.wiley.com/doi/10.1002/2014GL060267/abstract https://hdl.handle.net/10013/epic.44139 |
genre |
Arctic Arctic Ocean Fram Strait Iceberg* Nordic Seas |
genre_facet |
Arctic Arctic Ocean Fram Strait Iceberg* Nordic Seas |
op_source |
EPIC3Geophysical Research Letters, Wiley, 41(14), pp. 5068-5074, ISSN: 0094-8276 |
op_relation |
Arndt, J. E. orcid:0000-0002-9413-1612 , Niessen, F. orcid:0000-0001-6453-0594 , Jokat, W. orcid:0000-0002-7793-5854 and Dorschel, B. orcid:0000-0002-3495-5927 (2014) Deep water paleo-iceberg scouring on top of Hovgaard Ridge–Arctic Ocean , Geophysical Research Letters, 41 (14), pp. 5068-5074 . doi:10.1002/2014GL060267 <https://doi.org/10.1002/2014GL060267> , hdl:10013/epic.44139 |
op_doi |
https://doi.org/10.1002/2014GL060267 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
14 |
container_start_page |
5068 |
op_container_end_page |
5074 |
_version_ |
1810293229750321152 |