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...
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ftawi:oai:epic.awi.de:54960 2024-09-15T17:51:33+00:00 The Transpolar Drift Influence on the Arctic Ocean Silicon Cycle Liguori, Bianca T.P. Ehlert, Claudia Nöthig, Eva-Maria van Ooijen, Jan C. Pahnke, Katharina 2021-10-18 https://epic.awi.de/id/eprint/54960/ https://hdl.handle.net/10013/epic.d5eb4ac5-ac94-4798-82f5-19422945cd24 unknown AGU Liguori, B. T. orcid:0000-0001-9555-824X , Ehlert, C. orcid:0000-0003-0235-4542 , Nöthig, E. M. orcid:0000-0002-7527-7827 , van Ooijen, J. C. orcid:0000-0001-9022-3205 and Pahnke, K. orcid:0000-0001-9114-8411 (2021) The Transpolar Drift Influence on the Arctic Ocean Silicon Cycle , Journal of Geophysical Research: Oceans, 126 , pp. 1-17 . doi:10.1029/2021JC017352 <https://doi.org/10.1029/2021JC017352> , hdl:10013/epic.d5eb4ac5-ac94-4798-82f5-19422945cd24 EPIC3Journal of Geophysical Research: Oceans, AGU, 126, pp. 1-17 Article isiRev 2021 ftawi https://doi.org/10.1029/2021JC017352 2024-06-24T04:27:29Z 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 (δ30Si) 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 low dissolved Si concentrations ([DSi]) paired with high values of δ30Si-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 δ30Si, 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Oceans 126 11 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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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 (δ30Si) 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 low dissolved Si concentrations ([DSi]) paired with high values of δ30Si-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 δ30Si, 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, Bianca T.P. Ehlert, Claudia Nöthig, Eva-Maria van Ooijen, Jan C. Pahnke, Katharina |
spellingShingle |
Liguori, Bianca T.P. Ehlert, Claudia Nöthig, Eva-Maria van Ooijen, Jan C. Pahnke, Katharina The Transpolar Drift Influence on the Arctic Ocean Silicon Cycle |
author_facet |
Liguori, Bianca T.P. Ehlert, Claudia Nöthig, Eva-Maria van Ooijen, Jan C. Pahnke, Katharina |
author_sort |
Liguori, Bianca 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 |
publisher |
AGU |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54960/ https://hdl.handle.net/10013/epic.d5eb4ac5-ac94-4798-82f5-19422945cd24 |
genre |
Arctic Arctic Ocean Fram Strait laptev Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Fram Strait laptev Phytoplankton Sea ice |
op_source |
EPIC3Journal of Geophysical Research: Oceans, AGU, 126, pp. 1-17 |
op_relation |
Liguori, B. T. orcid:0000-0001-9555-824X , Ehlert, C. orcid:0000-0003-0235-4542 , Nöthig, E. M. orcid:0000-0002-7527-7827 , van Ooijen, J. C. orcid:0000-0001-9022-3205 and Pahnke, K. orcid:0000-0001-9114-8411 (2021) The Transpolar Drift Influence on the Arctic Ocean Silicon Cycle , Journal of Geophysical Research: Oceans, 126 , pp. 1-17 . doi:10.1029/2021JC017352 <https://doi.org/10.1029/2021JC017352> , hdl:10013/epic.d5eb4ac5-ac94-4798-82f5-19422945cd24 |
op_doi |
https://doi.org/10.1029/2021JC017352 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
11 |
_version_ |
1810293475482009600 |