Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge
The Lomonosov Ridge represents a major topographical feature in the Arctic Ocean which has a large effect on the water circulation and the distribution of water properties. This study presents detailed bathymetric survey data along with hydrographic data at two deep passages across the ridge: a sout...
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ftcopernicus:oai:publications.copernicus.org:os58079 2023-05-15T13:22:44+02:00 Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge Björk, Göran Jakobsson, Martin Assmann, Karen Andersson, Leif G. Nilsson, Johan Stranne, Christian Mayer, Larry 2019-01-08 application/pdf https://doi.org/10.5194/os-14-1-2018 https://os.copernicus.org/articles/14/1/2018/ eng eng doi:10.5194/os-14-1-2018 https://os.copernicus.org/articles/14/1/2018/ eISSN: 1812-0792 Text 2019 ftcopernicus https://doi.org/10.5194/os-14-1-2018 2020-07-20T16:23:29Z The Lomonosov Ridge represents a major topographical feature in the Arctic Ocean which has a large effect on the water circulation and the distribution of water properties. This study presents detailed bathymetric survey data along with hydrographic data at two deep passages across the ridge: a southern passage (80–81 ∘ N), where the ridge crest meets the Siberian continental slope, and a northern passage around 84.5 ∘ N. The southern channel is characterized by smooth and flat bathymetry around 1600–1700 m with a sill depth slightly shallower than 1700 m. A hydrographic section across the channel reveals an eastward flow with Amundsen Basin properties in the southern part and a westward flow of Makarov Basin properties in the northern part. The northern passage includes an approximately 72 km long and 33 km wide trough which forms an intra-basin in the Lomonosov Ridge morphology (the Oden Trough). The eastern side of the Oden Trough is enclosed by a narrow and steep ridge rising 500–600 m above a generally 1600 m deep trough bottom. The deepest passage (the sill) is 1470 m deep and located on this ridge. Hydrographic data show irregular temperature and salinity profiles indicating that water exchange occurs as midwater intrusions bringing water properties from each side of the ridge in well-defined but irregular layers. There is also morphological evidence that some rather energetic flows may occur in the vicinity of the sill. A well expressed deepening near the sill may be the result of seabed erosion by bottom currents. Text amundsen basin Arctic Arctic Ocean Lomonosov Ridge makarov basin Copernicus Publications: E-Journals Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Oden Trough ENVELOPE(149.857,149.857,85.005,85.005) Ocean Science 14 1 1 13 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The Lomonosov Ridge represents a major topographical feature in the Arctic Ocean which has a large effect on the water circulation and the distribution of water properties. This study presents detailed bathymetric survey data along with hydrographic data at two deep passages across the ridge: a southern passage (80–81 ∘ N), where the ridge crest meets the Siberian continental slope, and a northern passage around 84.5 ∘ N. The southern channel is characterized by smooth and flat bathymetry around 1600–1700 m with a sill depth slightly shallower than 1700 m. A hydrographic section across the channel reveals an eastward flow with Amundsen Basin properties in the southern part and a westward flow of Makarov Basin properties in the northern part. The northern passage includes an approximately 72 km long and 33 km wide trough which forms an intra-basin in the Lomonosov Ridge morphology (the Oden Trough). The eastern side of the Oden Trough is enclosed by a narrow and steep ridge rising 500–600 m above a generally 1600 m deep trough bottom. The deepest passage (the sill) is 1470 m deep and located on this ridge. Hydrographic data show irregular temperature and salinity profiles indicating that water exchange occurs as midwater intrusions bringing water properties from each side of the ridge in well-defined but irregular layers. There is also morphological evidence that some rather energetic flows may occur in the vicinity of the sill. A well expressed deepening near the sill may be the result of seabed erosion by bottom currents. |
format |
Text |
author |
Björk, Göran Jakobsson, Martin Assmann, Karen Andersson, Leif G. Nilsson, Johan Stranne, Christian Mayer, Larry |
spellingShingle |
Björk, Göran Jakobsson, Martin Assmann, Karen Andersson, Leif G. Nilsson, Johan Stranne, Christian Mayer, Larry Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge |
author_facet |
Björk, Göran Jakobsson, Martin Assmann, Karen Andersson, Leif G. Nilsson, Johan Stranne, Christian Mayer, Larry |
author_sort |
Björk, Göran |
title |
Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge |
title_short |
Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge |
title_full |
Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge |
title_fullStr |
Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge |
title_full_unstemmed |
Bathymetry and oceanic flow structure at two deep passages crossing the Lomonosov Ridge |
title_sort |
bathymetry and oceanic flow structure at two deep passages crossing the lomonosov ridge |
publishDate |
2019 |
url |
https://doi.org/10.5194/os-14-1-2018 https://os.copernicus.org/articles/14/1/2018/ |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) ENVELOPE(170.000,170.000,87.000,87.000) ENVELOPE(149.857,149.857,85.005,85.005) |
geographic |
Amundsen Basin Arctic Arctic Ocean Makarov Basin Oden Trough |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean Makarov Basin Oden Trough |
genre |
amundsen basin Arctic Arctic Ocean Lomonosov Ridge makarov basin |
genre_facet |
amundsen basin Arctic Arctic Ocean Lomonosov Ridge makarov basin |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-14-1-2018 https://os.copernicus.org/articles/14/1/2018/ |
op_doi |
https://doi.org/10.5194/os-14-1-2018 |
container_title |
Ocean Science |
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14 |
container_issue |
1 |
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1 |
op_container_end_page |
13 |
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1766366667015716864 |