Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard
Kongsfjorden and Krossfjorden are two ice-proximal fjords on the western coast of Spitsbergen which have been surveyed using multibeam bathymetry, sub-bottom profiling and gravity coring. Central and outer Kongsfjorden is dominated by a 30 km2 outcrop of bedrock, with a thin (<10m) sediment cover...
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Norwegian Polar Institute
2003
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Online Access: | http://nora.nerc.ac.uk/id/eprint/17660/ https://nora.nerc.ac.uk/id/eprint/17660/1/Multibeam_bathymetry.pdf https://doi.org/10.3402/polar.v22i2.6462 |
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ftnerc:oai:nora.nerc.ac.uk:17660 2023-05-15T16:22:17+02:00 Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard Howe, John A. Moreton, Steven G. Morri, Clara Morris, Peter 2003 text http://nora.nerc.ac.uk/id/eprint/17660/ https://nora.nerc.ac.uk/id/eprint/17660/1/Multibeam_bathymetry.pdf https://doi.org/10.3402/polar.v22i2.6462 en eng Norwegian Polar Institute https://nora.nerc.ac.uk/id/eprint/17660/1/Multibeam_bathymetry.pdf Howe, John A.; Moreton, Steven G.; Morri, Clara; Morris, Peter. 2003 Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard. Polar Research, 22 (2). 301-316. https://doi.org/10.3402/polar.v22i2.6462 <https://doi.org/10.3402/polar.v22i2.6462> cc_by_nc_4 CC-BY-NC Publication - Article PeerReviewed 2003 ftnerc https://doi.org/10.3402/polar.v22i2.6462 2023-02-04T19:31:17Z Kongsfjorden and Krossfjorden are two ice-proximal fjords on the western coast of Spitsbergen which have been surveyed using multibeam bathymetry, sub-bottom profiling and gravity coring. Central and outer Kongsfjorden is dominated by a 30 km2 outcrop of bedrock, with a thin (<10m) sediment cover. The bedrock displays a relict sub-glacial, ice-scoured topography produced during the glacial re-advances of the Weichselian (20 Ky BP) and again during the last major Holocene re-advance of the Little Ice Age (550-200 yrs BP). Drumlins and glacial flutes are common across the floor of Kongsfjorden, with lengths of 1.5-2.5 km and widths of <100 m, rising up to 10 m in water depths of <100 m. This topography is smoothed by bottom currents from the wind-driven forcing of surface waters. The flow is counter-clockwise, matching boundary layer movement under the influence of Coriolis force. Both fjords are characterized by a variable acoustic character, based on sub-bottom profile data. The deepest basins are dominated by parallel, well-laminated reflectors and an irregular-transparent acoustic character indicating the presence of Holocene-age fine-grained sediments up to 30 m thick. A parallel, irregular-transparent acoustic character with waveform morphology in inner Kongsfjorden is interpreted as moraines, originating from the 1948 and 1869 surges of Kronebreen glacier. Mass-flows are common on the flanks of topographic highs as acoustically chaotic-transparent lensoid and wedge-shaped reflectors. The sediments of outer and central Kongsfjorden are characterized by bioturbated, gas-rich homogeneous muds interpreted as being the result of the settling of fine-grained sediment and particulate suspensions Article in Journal/Newspaper glacier Kongsfjord* Kongsfjorden Krossfjord* Polar Research Svalbard Spitsbergen Natural Environment Research Council: NERC Open Research Archive Svalbard Kronebreen ENVELOPE(13.333,13.333,78.833,78.833) Krossfjorden ENVELOPE(11.742,11.742,79.141,79.141) Polar Research 22 2 301 316 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Kongsfjorden and Krossfjorden are two ice-proximal fjords on the western coast of Spitsbergen which have been surveyed using multibeam bathymetry, sub-bottom profiling and gravity coring. Central and outer Kongsfjorden is dominated by a 30 km2 outcrop of bedrock, with a thin (<10m) sediment cover. The bedrock displays a relict sub-glacial, ice-scoured topography produced during the glacial re-advances of the Weichselian (20 Ky BP) and again during the last major Holocene re-advance of the Little Ice Age (550-200 yrs BP). Drumlins and glacial flutes are common across the floor of Kongsfjorden, with lengths of 1.5-2.5 km and widths of <100 m, rising up to 10 m in water depths of <100 m. This topography is smoothed by bottom currents from the wind-driven forcing of surface waters. The flow is counter-clockwise, matching boundary layer movement under the influence of Coriolis force. Both fjords are characterized by a variable acoustic character, based on sub-bottom profile data. The deepest basins are dominated by parallel, well-laminated reflectors and an irregular-transparent acoustic character indicating the presence of Holocene-age fine-grained sediments up to 30 m thick. A parallel, irregular-transparent acoustic character with waveform morphology in inner Kongsfjorden is interpreted as moraines, originating from the 1948 and 1869 surges of Kronebreen glacier. Mass-flows are common on the flanks of topographic highs as acoustically chaotic-transparent lensoid and wedge-shaped reflectors. The sediments of outer and central Kongsfjorden are characterized by bioturbated, gas-rich homogeneous muds interpreted as being the result of the settling of fine-grained sediment and particulate suspensions |
format |
Article in Journal/Newspaper |
author |
Howe, John A. Moreton, Steven G. Morri, Clara Morris, Peter |
spellingShingle |
Howe, John A. Moreton, Steven G. Morri, Clara Morris, Peter Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard |
author_facet |
Howe, John A. Moreton, Steven G. Morri, Clara Morris, Peter |
author_sort |
Howe, John A. |
title |
Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard |
title_short |
Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard |
title_full |
Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard |
title_fullStr |
Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard |
title_full_unstemmed |
Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard |
title_sort |
multibeam bathymetry and the depositional environments of kongsfjorden and krossfjorden, western spitsbergen, svalbard |
publisher |
Norwegian Polar Institute |
publishDate |
2003 |
url |
http://nora.nerc.ac.uk/id/eprint/17660/ https://nora.nerc.ac.uk/id/eprint/17660/1/Multibeam_bathymetry.pdf https://doi.org/10.3402/polar.v22i2.6462 |
long_lat |
ENVELOPE(13.333,13.333,78.833,78.833) ENVELOPE(11.742,11.742,79.141,79.141) |
geographic |
Svalbard Kronebreen Krossfjorden |
geographic_facet |
Svalbard Kronebreen Krossfjorden |
genre |
glacier Kongsfjord* Kongsfjorden Krossfjord* Polar Research Svalbard Spitsbergen |
genre_facet |
glacier Kongsfjord* Kongsfjorden Krossfjord* Polar Research Svalbard Spitsbergen |
op_relation |
https://nora.nerc.ac.uk/id/eprint/17660/1/Multibeam_bathymetry.pdf Howe, John A.; Moreton, Steven G.; Morri, Clara; Morris, Peter. 2003 Multibeam bathymetry and the depositional environments of Kongsfjorden and Krossfjorden, western Spitsbergen, Svalbard. Polar Research, 22 (2). 301-316. https://doi.org/10.3402/polar.v22i2.6462 <https://doi.org/10.3402/polar.v22i2.6462> |
op_rights |
cc_by_nc_4 |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.3402/polar.v22i2.6462 |
container_title |
Polar Research |
container_volume |
22 |
container_issue |
2 |
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301 |
op_container_end_page |
316 |
_version_ |
1766010254795997184 |