Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years
Chemical parameters (dissolved oxygen content, concentrations of silicon, phosphate and nitrate, nitrate deficiency) in the TINRO Basin of the Okhotsk Sea (~1000 m depth) are considered for the years 2001–2002 with abnormally cold winters. The Basin water exchange with the southern Okhotsk Sea is li...
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Format: | Article in Journal/Newspaper |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2018
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Online Access: | https://doi.org/10.26428/1606-9919-2018-194-86-98 https://doaj.org/article/cc63c5aa4a26432f9d3a1aa45919ee48 |
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ftdoajarticles:oai:doaj.org/article:cc63c5aa4a26432f9d3a1aa45919ee48 2023-08-27T04:11:23+02:00 Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years A. Р. Nedashkovsky G. V. Khen N. I. Savelieva 2018-09-01T00:00:00Z https://doi.org/10.26428/1606-9919-2018-194-86-98 https://doaj.org/article/cc63c5aa4a26432f9d3a1aa45919ee48 RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/400 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2018-194-86-98 https://doaj.org/article/cc63c5aa4a26432f9d3a1aa45919ee48 Известия ТИНРО, Vol 194, Iss 3, Pp 86-98 (2018) охотское море впадина тинро биогенные элементы растворенный кислород денитрификация Aquaculture. Fisheries. Angling SH1-691 article 2018 ftdoajarticles https://doi.org/10.26428/1606-9919-2018-194-86-98 2023-08-06T00:41:16Z Chemical parameters (dissolved oxygen content, concentrations of silicon, phosphate and nitrate, nitrate deficiency) in the TINRO Basin of the Okhotsk Sea (~1000 m depth) are considered for the years 2001–2002 with abnormally cold winters. The Basin water exchange with the southern Okhotsk Sea is limited by the threshold with 500 m depth. The warm Intermediate water penetrates to the Basin above the threshold only. The warm intermediate layer is rather thin (σθ = 26.88–26.92 or 400–500 m depth) in the years with abnormally cold winter. It is distinguished by high concentrations of nutrients and low oxygen content; moreover, their values are the highest/lowest for the entire Okhotsk Sea, presumably because of partial isolation of its water in the basin where it is captured by the water gyre and «aged» with biogeochemical processes. The deep waters of the TINRO Basin (σθ ~27.02) are formed by mixing of three components: intermediate Okhotsk Sea waters, waters of the temperature maximum layer and dense cold waters of the Shelikhov Bay. The portion of the latter water mass is evaluated as 37 %. It enriches the Deep water in the Basin with dissolved oxygen and provides relatively low concentrations of nutrients. The peculiarity of the TINRO Basin manifests in the fact that these processes in the deep-sea zone (800–1000 m) proceed with high velocities typical for shelf. In addition, in the deep waters of the Basin, there is a significant deficit of nitrate, presumably due to denitrification, which also proceeds with high rate. This suggests that non-conservative behavior of hydrochemical characteristics in the deep waters is caused by processes occurring on the surface of bottom sediments. The main reason for this behavior is probably an additional accumulation of biogenic material at the bottom of the TINRO Basin as the result of its transfer from shelf by the cold dense waters ventilating the Basin. The TINRO Basin, being a trap for the cold dense shelf waters, apparently is a convenient object for observing and ... Article in Journal/Newspaper okhotsk sea Directory of Open Access Journals: DOAJ Articles Okhotsk TINRO Basin ENVELOPE(153.000,153.000,56.000,56.000) Izvestiya TINRO 194 86 98 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
охотское море впадина тинро биогенные элементы растворенный кислород денитрификация Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
охотское море впадина тинро биогенные элементы растворенный кислород денитрификация Aquaculture. Fisheries. Angling SH1-691 A. Р. Nedashkovsky G. V. Khen N. I. Savelieva Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years |
topic_facet |
охотское море впадина тинро биогенные элементы растворенный кислород денитрификация Aquaculture. Fisheries. Angling SH1-691 |
description |
Chemical parameters (dissolved oxygen content, concentrations of silicon, phosphate and nitrate, nitrate deficiency) in the TINRO Basin of the Okhotsk Sea (~1000 m depth) are considered for the years 2001–2002 with abnormally cold winters. The Basin water exchange with the southern Okhotsk Sea is limited by the threshold with 500 m depth. The warm Intermediate water penetrates to the Basin above the threshold only. The warm intermediate layer is rather thin (σθ = 26.88–26.92 or 400–500 m depth) in the years with abnormally cold winter. It is distinguished by high concentrations of nutrients and low oxygen content; moreover, their values are the highest/lowest for the entire Okhotsk Sea, presumably because of partial isolation of its water in the basin where it is captured by the water gyre and «aged» with biogeochemical processes. The deep waters of the TINRO Basin (σθ ~27.02) are formed by mixing of three components: intermediate Okhotsk Sea waters, waters of the temperature maximum layer and dense cold waters of the Shelikhov Bay. The portion of the latter water mass is evaluated as 37 %. It enriches the Deep water in the Basin with dissolved oxygen and provides relatively low concentrations of nutrients. The peculiarity of the TINRO Basin manifests in the fact that these processes in the deep-sea zone (800–1000 m) proceed with high velocities typical for shelf. In addition, in the deep waters of the Basin, there is a significant deficit of nitrate, presumably due to denitrification, which also proceeds with high rate. This suggests that non-conservative behavior of hydrochemical characteristics in the deep waters is caused by processes occurring on the surface of bottom sediments. The main reason for this behavior is probably an additional accumulation of biogenic material at the bottom of the TINRO Basin as the result of its transfer from shelf by the cold dense waters ventilating the Basin. The TINRO Basin, being a trap for the cold dense shelf waters, apparently is a convenient object for observing and ... |
format |
Article in Journal/Newspaper |
author |
A. Р. Nedashkovsky G. V. Khen N. I. Savelieva |
author_facet |
A. Р. Nedashkovsky G. V. Khen N. I. Savelieva |
author_sort |
A. Р. Nedashkovsky |
title |
Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years |
title_short |
Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years |
title_full |
Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years |
title_fullStr |
Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years |
title_full_unstemmed |
Chemical patterns of the TINRO Basin (Okhotsk Sea) in abnormally cold years |
title_sort |
chemical patterns of the tinro basin (okhotsk sea) in abnormally cold years |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2018 |
url |
https://doi.org/10.26428/1606-9919-2018-194-86-98 https://doaj.org/article/cc63c5aa4a26432f9d3a1aa45919ee48 |
long_lat |
ENVELOPE(153.000,153.000,56.000,56.000) |
geographic |
Okhotsk TINRO Basin |
geographic_facet |
Okhotsk TINRO Basin |
genre |
okhotsk sea |
genre_facet |
okhotsk sea |
op_source |
Известия ТИНРО, Vol 194, Iss 3, Pp 86-98 (2018) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/400 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2018-194-86-98 https://doaj.org/article/cc63c5aa4a26432f9d3a1aa45919ee48 |
op_doi |
https://doi.org/10.26428/1606-9919-2018-194-86-98 |
container_title |
Izvestiya TINRO |
container_volume |
194 |
container_start_page |
86 |
op_container_end_page |
98 |
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1775354112301334528 |