Shelf–Basin interaction along the East Siberian Sea
Extensive biogeochemical transformation of organic matter takes place in the shallow continental shelf seas of Siberia. This, in combination with brine production from sea-ice formation, results in cold bottom waters with relatively high salinity and nutrient concentrations, as well as low oxygen an...
Published in: | Ocean Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications (EGU)
2017
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Online Access: | https://oceanrep.geomar.de/id/eprint/38038/ https://oceanrep.geomar.de/id/eprint/38038/1/os-13-349-2017.pdf https://doi.org/10.5194/os-13-349-2017 |
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ftoceanrep:oai:oceanrep.geomar.de:38038 2023-05-15T15:54:37+02:00 Shelf–Basin interaction along the East Siberian Sea Anderson, Leif G. Björk, Göran Holby, Ola Jutterström, Sara Mörth, Carl Magnus O'Regan, Matt Pearce, Christof Semiletov, Igor Stranne, Christian Stöven, Tim Tanhua, Toste Ulfsbo, Adam Jakobsson, Martin 2017-04-27 text https://oceanrep.geomar.de/id/eprint/38038/ https://oceanrep.geomar.de/id/eprint/38038/1/os-13-349-2017.pdf https://doi.org/10.5194/os-13-349-2017 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/38038/1/os-13-349-2017.pdf Anderson, L. G., Björk, G., Holby, O., Jutterström, S., Mörth, C. M., O'Regan, M., Pearce, C., Semiletov, I., Stranne, C., Stöven, T. , Tanhua, T. , Ulfsbo, A. and Jakobsson, M. (2017) Shelf–Basin interaction along the East Siberian Sea. Open Access Ocean Science, 13 (2). pp. 349-363. DOI 10.5194/os-13-349-2017 <https://doi.org/10.5194/os-13-349-2017>. doi:10.5194/os-13-349-2017 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2017 ftoceanrep https://doi.org/10.5194/os-13-349-2017 2023-04-07T15:33:26Z Extensive biogeochemical transformation of organic matter takes place in the shallow continental shelf seas of Siberia. This, in combination with brine production from sea-ice formation, results in cold bottom waters with relatively high salinity and nutrient concentrations, as well as low oxygen and pH levels. Data from the SWERUS-C3 expedition with icebreaker Oden, from July to September 2014, show the distribution of such nutrient-rich, cold bottom waters along the continental margin from about 140 to 180° E. The water with maximum nutrient concentration, classically named the upper halocline, is absent over the Lomonosov Ridge at 140° E, while it appears in the Makarov Basin at 150° E and intensifies further eastwards. At the intercept between the Mendeleev Ridge and the East Siberian continental shelf slope, the nutrient maximum is still intense, but distributed across a larger depth interval. The nutrient-rich water is found here at salinities of up to ∼ 34.5, i.e. in the water classically named lower halocline. East of 170° E transient tracers show significantly less ventilated waters below about 150 m water depth. This likely results from a local isolation of waters over the Chukchi Abyssal Plain as the boundary current from the west is steered away from this area by the bathymetry of the Mendeleev Ridge. The water with salinities of ∼ 34.5 has high nutrients and low oxygen concentrations as well as low pH, typically indicating decay of organic matter. A deficit in nitrate relative to phosphate suggests that this process partly occurs under hypoxia. We conclude that the high nutrient water with salinity ∼ 34.5 are formed on the shelf slope in the Mendeleev Ridge region from interior basin water that is trapped for enough time to attain its signature through interaction with the sediment. Article in Journal/Newspaper Chukchi East Siberian Sea Lomonosov Ridge makarov basin oden Sea ice SWERUS-C3 Siberia OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Chukchi Abyssal Plain ENVELOPE(-171.192,-171.192,76.285,76.285) Ocean Science 13 2 349 363 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Extensive biogeochemical transformation of organic matter takes place in the shallow continental shelf seas of Siberia. This, in combination with brine production from sea-ice formation, results in cold bottom waters with relatively high salinity and nutrient concentrations, as well as low oxygen and pH levels. Data from the SWERUS-C3 expedition with icebreaker Oden, from July to September 2014, show the distribution of such nutrient-rich, cold bottom waters along the continental margin from about 140 to 180° E. The water with maximum nutrient concentration, classically named the upper halocline, is absent over the Lomonosov Ridge at 140° E, while it appears in the Makarov Basin at 150° E and intensifies further eastwards. At the intercept between the Mendeleev Ridge and the East Siberian continental shelf slope, the nutrient maximum is still intense, but distributed across a larger depth interval. The nutrient-rich water is found here at salinities of up to ∼ 34.5, i.e. in the water classically named lower halocline. East of 170° E transient tracers show significantly less ventilated waters below about 150 m water depth. This likely results from a local isolation of waters over the Chukchi Abyssal Plain as the boundary current from the west is steered away from this area by the bathymetry of the Mendeleev Ridge. The water with salinities of ∼ 34.5 has high nutrients and low oxygen concentrations as well as low pH, typically indicating decay of organic matter. A deficit in nitrate relative to phosphate suggests that this process partly occurs under hypoxia. We conclude that the high nutrient water with salinity ∼ 34.5 are formed on the shelf slope in the Mendeleev Ridge region from interior basin water that is trapped for enough time to attain its signature through interaction with the sediment. |
format |
Article in Journal/Newspaper |
author |
Anderson, Leif G. Björk, Göran Holby, Ola Jutterström, Sara Mörth, Carl Magnus O'Regan, Matt Pearce, Christof Semiletov, Igor Stranne, Christian Stöven, Tim Tanhua, Toste Ulfsbo, Adam Jakobsson, Martin |
spellingShingle |
Anderson, Leif G. Björk, Göran Holby, Ola Jutterström, Sara Mörth, Carl Magnus O'Regan, Matt Pearce, Christof Semiletov, Igor Stranne, Christian Stöven, Tim Tanhua, Toste Ulfsbo, Adam Jakobsson, Martin Shelf–Basin interaction along the East Siberian Sea |
author_facet |
Anderson, Leif G. Björk, Göran Holby, Ola Jutterström, Sara Mörth, Carl Magnus O'Regan, Matt Pearce, Christof Semiletov, Igor Stranne, Christian Stöven, Tim Tanhua, Toste Ulfsbo, Adam Jakobsson, Martin |
author_sort |
Anderson, Leif G. |
title |
Shelf–Basin interaction along the East Siberian Sea |
title_short |
Shelf–Basin interaction along the East Siberian Sea |
title_full |
Shelf–Basin interaction along the East Siberian Sea |
title_fullStr |
Shelf–Basin interaction along the East Siberian Sea |
title_full_unstemmed |
Shelf–Basin interaction along the East Siberian Sea |
title_sort |
shelf–basin interaction along the east siberian sea |
publisher |
Copernicus Publications (EGU) |
publishDate |
2017 |
url |
https://oceanrep.geomar.de/id/eprint/38038/ https://oceanrep.geomar.de/id/eprint/38038/1/os-13-349-2017.pdf https://doi.org/10.5194/os-13-349-2017 |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) ENVELOPE(170.000,170.000,87.000,87.000) ENVELOPE(-171.192,-171.192,76.285,76.285) |
geographic |
East Siberian Sea Makarov Basin Chukchi Abyssal Plain |
geographic_facet |
East Siberian Sea Makarov Basin Chukchi Abyssal Plain |
genre |
Chukchi East Siberian Sea Lomonosov Ridge makarov basin oden Sea ice SWERUS-C3 Siberia |
genre_facet |
Chukchi East Siberian Sea Lomonosov Ridge makarov basin oden Sea ice SWERUS-C3 Siberia |
op_relation |
https://oceanrep.geomar.de/id/eprint/38038/1/os-13-349-2017.pdf Anderson, L. G., Björk, G., Holby, O., Jutterström, S., Mörth, C. M., O'Regan, M., Pearce, C., Semiletov, I., Stranne, C., Stöven, T. , Tanhua, T. , Ulfsbo, A. and Jakobsson, M. (2017) Shelf–Basin interaction along the East Siberian Sea. Open Access Ocean Science, 13 (2). pp. 349-363. DOI 10.5194/os-13-349-2017 <https://doi.org/10.5194/os-13-349-2017>. doi:10.5194/os-13-349-2017 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-13-349-2017 |
container_title |
Ocean Science |
container_volume |
13 |
container_issue |
2 |
container_start_page |
349 |
op_container_end_page |
363 |
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1766389857140080640 |