The transpolar drift influence on the Arctic Ocean silicon cycle
During most of the year, diatom production in the ice-covered Central Arctic Ocean (CAO) is limited by light availability and nutrient supply. Therefore, biological production is thought to be generally low, with higher biological production at the sea ice edge and over partially ice-free shelf area...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://www.vliz.be/imisdocs/publications/92/369992.pdf |
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ftnioz:oai:imis.nioz.nl:348070 2023-05-15T14:59:54+02:00 The transpolar drift influence on the Arctic Ocean silicon cycle Liguori, B.T.P. Ehlert, C. Nöthig, E.-M. van Ooijen, J.C. Pahnke, K. 2021 application/pdf https://www.vliz.be/imisdocs/publications/92/369992.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000723095600012 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2021jc017352 https://www.vliz.be/imisdocs/publications/92/369992.pdf info:eu-repo/semantics/openAccess %3Ci%3EJGR%3A+Oceans+126%2811%29%3C%2Fi%3E%3A+e2021JC017352.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2021jc017352%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2021jc017352%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftnioz https://doi.org/10.1029/2021jc017352 2022-05-01T14:15:45Z During most of the year, diatom production in the ice-covered Central Arctic Ocean (CAO) is limited by light availability and nutrient supply. Therefore, biological production is thought to be generally low, with higher biological production at the sea ice edge and over partially ice-free shelf areas. The major surface ocean current in the CAO is the Transpolar Drift (TPD), which transports sea ice and water from the rivers and shelves of the Laptev and the East Siberian Seas across the CAO toward the Fram Strait, carrying high amounts of terrestrial-derived material over long distances. We used Si isotopes (δ 30 Si) to better understand the difference between lower and higher biological production areas and how the TPD potentially affects the Si cycle in the CAO. Our data show lowdissolved Si concentrations ([DSi]) paired with high values of δ 30 Si-DSi in all surface samples indicating fractionation by diatoms. Specifically, outside the TPD influence, all nutrients were depleted and supply was limited due to stratified conditions, thus preventing further phytoplankton growth in the area during the sampling time in late summer-early fall. In contrast, under the TPD influence, diatom primary production was limited by low nitrate and strongly limited by light due to the presence of sea ice, even though [DSi] values were much higher than outside the TPD. Based on δ 30 Si, we could identify low but measurable DSi utilization in the TPD, potentially highlighting the importance of sea ice-attached diatoms transported to the CAO via the TPD for the Si cycle in this region. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait laptev Phytoplankton Sea ice NIOZ Repository (Royal Netherlands Institute for Sea Research) Arctic Arctic Ocean Journal of Geophysical Research: Oceans 126 11 |
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Open Polar |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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ftnioz |
language |
English |
description |
During most of the year, diatom production in the ice-covered Central Arctic Ocean (CAO) is limited by light availability and nutrient supply. Therefore, biological production is thought to be generally low, with higher biological production at the sea ice edge and over partially ice-free shelf areas. The major surface ocean current in the CAO is the Transpolar Drift (TPD), which transports sea ice and water from the rivers and shelves of the Laptev and the East Siberian Seas across the CAO toward the Fram Strait, carrying high amounts of terrestrial-derived material over long distances. We used Si isotopes (δ 30 Si) to better understand the difference between lower and higher biological production areas and how the TPD potentially affects the Si cycle in the CAO. Our data show lowdissolved Si concentrations ([DSi]) paired with high values of δ 30 Si-DSi in all surface samples indicating fractionation by diatoms. Specifically, outside the TPD influence, all nutrients were depleted and supply was limited due to stratified conditions, thus preventing further phytoplankton growth in the area during the sampling time in late summer-early fall. In contrast, under the TPD influence, diatom primary production was limited by low nitrate and strongly limited by light due to the presence of sea ice, even though [DSi] values were much higher than outside the TPD. Based on δ 30 Si, we could identify low but measurable DSi utilization in the TPD, potentially highlighting the importance of sea ice-attached diatoms transported to the CAO via the TPD for the Si cycle in this region. |
format |
Article in Journal/Newspaper |
author |
Liguori, B.T.P. Ehlert, C. Nöthig, E.-M. van Ooijen, J.C. Pahnke, K. |
spellingShingle |
Liguori, B.T.P. Ehlert, C. Nöthig, E.-M. van Ooijen, J.C. Pahnke, K. The transpolar drift influence on the Arctic Ocean silicon cycle |
author_facet |
Liguori, B.T.P. Ehlert, C. Nöthig, E.-M. van Ooijen, J.C. Pahnke, K. |
author_sort |
Liguori, B.T.P. |
title |
The transpolar drift influence on the Arctic Ocean silicon cycle |
title_short |
The transpolar drift influence on the Arctic Ocean silicon cycle |
title_full |
The transpolar drift influence on the Arctic Ocean silicon cycle |
title_fullStr |
The transpolar drift influence on the Arctic Ocean silicon cycle |
title_full_unstemmed |
The transpolar drift influence on the Arctic Ocean silicon cycle |
title_sort |
transpolar drift influence on the arctic ocean silicon cycle |
publishDate |
2021 |
url |
https://www.vliz.be/imisdocs/publications/92/369992.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Fram Strait laptev Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Fram Strait laptev Phytoplankton Sea ice |
op_source |
%3Ci%3EJGR%3A+Oceans+126%2811%29%3C%2Fi%3E%3A+e2021JC017352.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2021jc017352%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2021jc017352%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000723095600012 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2021jc017352 https://www.vliz.be/imisdocs/publications/92/369992.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021jc017352 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
11 |
_version_ |
1766332022448455680 |