The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle
The availability of silicon (Si) in the ocean plays an important role in regulating biogeochemical and ecological processes. The Si budget of the Arctic Ocean appears balanced, with inputs equivalent to outputs, though it is unclear how a changing climate might aggravate this balance. In this study,...
Published in: | Global Biogeochemical Cycles |
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American Geophysical Union (AGU)
2024
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Online Access: | https://epic.awi.de/id/eprint/58303/ https://epic.awi.de/id/eprint/58303/1/Ray_et_al_Global_Biogeochemical_Cycles_2024.pdf https://doi.org/10.1029/2023gb007746 https://hdl.handle.net/10013/epic.56e2ef05-9d2f-4532-af0b-81bda5f50acd |
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ftawi:oai:epic.awi.de:58303 2024-03-24T08:58:21+00:00 The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle Ray, Nicholas E Martens, Jannik Ajmar, Marco Tesi, Tommaso Yakushev, Evgeniy Gangnus, Ivan Strauss, Jens Schirrmeister, Lutz Semiletov, Igor Wild, Birgit 2024-01 application/pdf https://epic.awi.de/id/eprint/58303/ https://epic.awi.de/id/eprint/58303/1/Ray_et_al_Global_Biogeochemical_Cycles_2024.pdf https://doi.org/10.1029/2023gb007746 https://hdl.handle.net/10013/epic.56e2ef05-9d2f-4532-af0b-81bda5f50acd unknown American Geophysical Union (AGU) https://epic.awi.de/id/eprint/58303/1/Ray_et_al_Global_Biogeochemical_Cycles_2024.pdf Ray, N. E. , Martens, J. , Ajmar, M. , Tesi, T. , Yakushev, E. , Gangnus, I. , Strauss, J. orcid:0000-0003-4678-4982 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Semiletov, I. and Wild, B. (2024) The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle , Global Biogeochemical Cycles, 38 (1) . doi:10.1029/2023gb007746 <https://doi.org/10.1029/2023gb007746> , hdl:10013/epic.56e2ef05-9d2f-4532-af0b-81bda5f50acd EPIC3Global Biogeochemical Cycles, American Geophysical Union (AGU), 38(1), ISSN: 0886-6236 Article isiRev 2024 ftawi https://doi.org/10.1029/2023gb007746 2024-02-27T09:55:26Z The availability of silicon (Si) in the ocean plays an important role in regulating biogeochemical and ecological processes. The Si budget of the Arctic Ocean appears balanced, with inputs equivalent to outputs, though it is unclear how a changing climate might aggravate this balance. In this study, we focus on Si cycling in Arctic coastal areas and continental shelf sediments to better constrain the Arctic Ocean Si budget. We provide the first estimate of amorphous Si (ASi) loading from erosion of coastal Yedoma deposits (30–90 Gmol yr−1), demonstrating comparable rates to particulate Si loading from rivers (10–90 Gmol yr−1). We found a positive relationship between surface sediment ASi and organic matter content on continental shelves. Combining these values with published Arctic shelf sediment properties and burial rates we estimate 70 Gmol Si yr−1 is buried on Arctic continental shelves, equivalent to 4.5% of all Si inputs to the Arctic Ocean. Sediment dissolved Si fluxes increased with distance from river mouths along cruise transects of shelf regions influenced by major rivers in the Laptev and East Siberian seas. On an annual basis, we estimate that Arctic shelf sediments recycle approximately up to twice as much DSi (680 Gmol Si) as is loaded from rivers (340–500 Gmol Si). Article in Journal/Newspaper Arctic Arctic Arctic Ocean laptev Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Global Biogeochemical Cycles 38 1 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The availability of silicon (Si) in the ocean plays an important role in regulating biogeochemical and ecological processes. The Si budget of the Arctic Ocean appears balanced, with inputs equivalent to outputs, though it is unclear how a changing climate might aggravate this balance. In this study, we focus on Si cycling in Arctic coastal areas and continental shelf sediments to better constrain the Arctic Ocean Si budget. We provide the first estimate of amorphous Si (ASi) loading from erosion of coastal Yedoma deposits (30–90 Gmol yr−1), demonstrating comparable rates to particulate Si loading from rivers (10–90 Gmol yr−1). We found a positive relationship between surface sediment ASi and organic matter content on continental shelves. Combining these values with published Arctic shelf sediment properties and burial rates we estimate 70 Gmol Si yr−1 is buried on Arctic continental shelves, equivalent to 4.5% of all Si inputs to the Arctic Ocean. Sediment dissolved Si fluxes increased with distance from river mouths along cruise transects of shelf regions influenced by major rivers in the Laptev and East Siberian seas. On an annual basis, we estimate that Arctic shelf sediments recycle approximately up to twice as much DSi (680 Gmol Si) as is loaded from rivers (340–500 Gmol Si). |
format |
Article in Journal/Newspaper |
author |
Ray, Nicholas E Martens, Jannik Ajmar, Marco Tesi, Tommaso Yakushev, Evgeniy Gangnus, Ivan Strauss, Jens Schirrmeister, Lutz Semiletov, Igor Wild, Birgit |
spellingShingle |
Ray, Nicholas E Martens, Jannik Ajmar, Marco Tesi, Tommaso Yakushev, Evgeniy Gangnus, Ivan Strauss, Jens Schirrmeister, Lutz Semiletov, Igor Wild, Birgit The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle |
author_facet |
Ray, Nicholas E Martens, Jannik Ajmar, Marco Tesi, Tommaso Yakushev, Evgeniy Gangnus, Ivan Strauss, Jens Schirrmeister, Lutz Semiletov, Igor Wild, Birgit |
author_sort |
Ray, Nicholas E |
title |
The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle |
title_short |
The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle |
title_full |
The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle |
title_fullStr |
The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle |
title_full_unstemmed |
The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle |
title_sort |
role of coastal yedoma deposits and continental shelf sediments in the arctic ocean silicon cycle |
publisher |
American Geophysical Union (AGU) |
publishDate |
2024 |
url |
https://epic.awi.de/id/eprint/58303/ https://epic.awi.de/id/eprint/58303/1/Ray_et_al_Global_Biogeochemical_Cycles_2024.pdf https://doi.org/10.1029/2023gb007746 https://hdl.handle.net/10013/epic.56e2ef05-9d2f-4532-af0b-81bda5f50acd |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean laptev |
genre_facet |
Arctic Arctic Arctic Ocean laptev |
op_source |
EPIC3Global Biogeochemical Cycles, American Geophysical Union (AGU), 38(1), ISSN: 0886-6236 |
op_relation |
https://epic.awi.de/id/eprint/58303/1/Ray_et_al_Global_Biogeochemical_Cycles_2024.pdf Ray, N. E. , Martens, J. , Ajmar, M. , Tesi, T. , Yakushev, E. , Gangnus, I. , Strauss, J. orcid:0000-0003-4678-4982 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Semiletov, I. and Wild, B. (2024) The Role of Coastal Yedoma Deposits and Continental Shelf Sediments in the Arctic Ocean Silicon Cycle , Global Biogeochemical Cycles, 38 (1) . doi:10.1029/2023gb007746 <https://doi.org/10.1029/2023gb007746> , hdl:10013/epic.56e2ef05-9d2f-4532-af0b-81bda5f50acd |
op_doi |
https://doi.org/10.1029/2023gb007746 |
container_title |
Global Biogeochemical Cycles |
container_volume |
38 |
container_issue |
1 |
_version_ |
1794398044760834048 |