On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea
Substantial amounts of nutrients and carbon enter the Arctic Ocean from the Pacific Ocean through the Bering Strait, distributed over three main pathways. Water with low salinities and nutrient concentrations takes an eastern route along the Alaskan coast, as Alaskan Coastal Water. A central pathway...
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Online Access: | https://hdl.handle.net/11250/3011621 https://doi.org/10.5194/os-18-29-2022 |
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ftimr:oai:imr.brage.unit.no:11250/3011621 2023-05-15T15:01:58+02:00 On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea Clement Kinney, Jaclyn Assmann, Karen Margarete Maslowski, Wieslaw Björk, Göran Jakobsson, Martin Jutterström, Sara Lee, Younjoo J. Osinski, Robert Semiletov, Igor Ulfsbo, Adam Wählström, Irene Anderson, Leif G. 2022 application/pdf https://hdl.handle.net/11250/3011621 https://doi.org/10.5194/os-18-29-2022 eng eng Ocean Science. 2022, 18 (1), 29-49. urn:issn:1812-0784 https://hdl.handle.net/11250/3011621 https://doi.org/10.5194/os-18-29-2022 cristin:2023515 29-49 18 Ocean Science 1 Peer reviewed Journal article 2022 ftimr https://doi.org/10.5194/os-18-29-2022 2022-08-17T22:41:35Z Substantial amounts of nutrients and carbon enter the Arctic Ocean from the Pacific Ocean through the Bering Strait, distributed over three main pathways. Water with low salinities and nutrient concentrations takes an eastern route along the Alaskan coast, as Alaskan Coastal Water. A central pathway exhibits intermediate salinity and nutrient concentrations, while the most nutrient-rich water enters the Bering Strait on its western side. Towards the Arctic Ocean, the flow of these water masses is subject to strong topographic steering within the Chukchi Sea with volume transport modulated by the wind field. In this contribution, we use data from several sections crossing Herald Canyon collected in 2008 and 2014 together with numerical modelling to investigate the circulation and transport in the western part of the Chukchi Sea. We find that a substantial fraction of water from the Chukchi Sea enters the East Siberian Sea south of Wrangel Island and circulates in an anticyclonic direction around the island. This water then contributes to the high-nutrient waters of Herald Canyon. The bottom of the canyon has the highest nutrient concentrations, likely as a result of addition from the degradation of organic matter at the sediment surface in the East Siberian Sea. The flux of nutrients (nitrate, phosphate, and silicate) and dissolved inorganic carbon in Bering Summer Water and Winter Water is computed by combining hydrographic and nutrient observations with geostrophic transport referenced to lowered acoustic Doppler current profiler (LADCP) and surface drift data. Even if there are some general similarities between the years, there are differences in both the temperature–salinity and nutrient characteristics. To assess these differences, and also to get a wider temporal and spatial view, numerical modelling results are applied. According to model results, high-frequency variability dominates the flow in Herald Canyon. This leads us to conclude that this region needs to be monitored over a longer time frame to ... Article in Journal/Newspaper Arctic Arctic Ocean Bering Strait Chukchi Chukchi Sea East Siberian Sea Wrangel Island Institute for Marine Research: Brage IMR Arctic Arctic Ocean Chukchi Sea Bering Strait Pacific East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Wrangel Island ENVELOPE(-179.385,-179.385,71.244,71.244) Ocean Science 18 1 29 49 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
Substantial amounts of nutrients and carbon enter the Arctic Ocean from the Pacific Ocean through the Bering Strait, distributed over three main pathways. Water with low salinities and nutrient concentrations takes an eastern route along the Alaskan coast, as Alaskan Coastal Water. A central pathway exhibits intermediate salinity and nutrient concentrations, while the most nutrient-rich water enters the Bering Strait on its western side. Towards the Arctic Ocean, the flow of these water masses is subject to strong topographic steering within the Chukchi Sea with volume transport modulated by the wind field. In this contribution, we use data from several sections crossing Herald Canyon collected in 2008 and 2014 together with numerical modelling to investigate the circulation and transport in the western part of the Chukchi Sea. We find that a substantial fraction of water from the Chukchi Sea enters the East Siberian Sea south of Wrangel Island and circulates in an anticyclonic direction around the island. This water then contributes to the high-nutrient waters of Herald Canyon. The bottom of the canyon has the highest nutrient concentrations, likely as a result of addition from the degradation of organic matter at the sediment surface in the East Siberian Sea. The flux of nutrients (nitrate, phosphate, and silicate) and dissolved inorganic carbon in Bering Summer Water and Winter Water is computed by combining hydrographic and nutrient observations with geostrophic transport referenced to lowered acoustic Doppler current profiler (LADCP) and surface drift data. Even if there are some general similarities between the years, there are differences in both the temperature–salinity and nutrient characteristics. To assess these differences, and also to get a wider temporal and spatial view, numerical modelling results are applied. According to model results, high-frequency variability dominates the flow in Herald Canyon. This leads us to conclude that this region needs to be monitored over a longer time frame to ... |
format |
Article in Journal/Newspaper |
author |
Clement Kinney, Jaclyn Assmann, Karen Margarete Maslowski, Wieslaw Björk, Göran Jakobsson, Martin Jutterström, Sara Lee, Younjoo J. Osinski, Robert Semiletov, Igor Ulfsbo, Adam Wählström, Irene Anderson, Leif G. |
spellingShingle |
Clement Kinney, Jaclyn Assmann, Karen Margarete Maslowski, Wieslaw Björk, Göran Jakobsson, Martin Jutterström, Sara Lee, Younjoo J. Osinski, Robert Semiletov, Igor Ulfsbo, Adam Wählström, Irene Anderson, Leif G. On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea |
author_facet |
Clement Kinney, Jaclyn Assmann, Karen Margarete Maslowski, Wieslaw Björk, Göran Jakobsson, Martin Jutterström, Sara Lee, Younjoo J. Osinski, Robert Semiletov, Igor Ulfsbo, Adam Wählström, Irene Anderson, Leif G. |
author_sort |
Clement Kinney, Jaclyn |
title |
On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea |
title_short |
On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea |
title_full |
On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea |
title_fullStr |
On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea |
title_full_unstemmed |
On the circulation, water mass distribution, and nutrient concentrations of the western Chukchi Sea |
title_sort |
on the circulation, water mass distribution, and nutrient concentrations of the western chukchi sea |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3011621 https://doi.org/10.5194/os-18-29-2022 |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) ENVELOPE(-179.385,-179.385,71.244,71.244) |
geographic |
Arctic Arctic Ocean Chukchi Sea Bering Strait Pacific East Siberian Sea Wrangel Island |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Bering Strait Pacific East Siberian Sea Wrangel Island |
genre |
Arctic Arctic Ocean Bering Strait Chukchi Chukchi Sea East Siberian Sea Wrangel Island |
genre_facet |
Arctic Arctic Ocean Bering Strait Chukchi Chukchi Sea East Siberian Sea Wrangel Island |
op_source |
29-49 18 Ocean Science 1 |
op_relation |
Ocean Science. 2022, 18 (1), 29-49. urn:issn:1812-0784 https://hdl.handle.net/11250/3011621 https://doi.org/10.5194/os-18-29-2022 cristin:2023515 |
op_doi |
https://doi.org/10.5194/os-18-29-2022 |
container_title |
Ocean Science |
container_volume |
18 |
container_issue |
1 |
container_start_page |
29 |
op_container_end_page |
49 |
_version_ |
1766333964128092160 |