Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle
Glacial environments play an important role in high-latitude marine nutrient cycling, potentially contributing significant fluxes of silicon (Si) to the polar oceans, either as dissolved silicon (DSi) or as dissolvable amorphous silica (ASi). Silicon is a key nutrient in promoting marine primary pro...
Published in: | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1098/rspa.2019.0098 https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2019.0098 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspa.2019.0098 |
id |
crroyalsociety:10.1098/rspa.2019.0098 |
---|---|
record_format |
openpolar |
spelling |
crroyalsociety:10.1098/rspa.2019.0098 2024-10-13T14:04:49+00:00 Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle Hatton, Jade E. Hendry, Katharine R. Hawkings, Jonathan R. Wadham, Jemma L. Opfergelt, Sophie Kohler, Tyler J. Yde, Jacob C. Stibal, Marek Žárský, Jakub D. European Research Council Royal Society European Commission Horizon 2020 Marie Skłodowska-Curie Actions fellowship Leverhulme Trust Grantová Agentura České Republiky Charles University Research Centre Program 2019 http://dx.doi.org/10.1098/rspa.2019.0098 https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2019.0098 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspa.2019.0098 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 475, issue 2228, page 20190098 ISSN 1364-5021 1471-2946 journal-article 2019 crroyalsociety https://doi.org/10.1098/rspa.2019.0098 2024-09-17T04:34:48Z Glacial environments play an important role in high-latitude marine nutrient cycling, potentially contributing significant fluxes of silicon (Si) to the polar oceans, either as dissolved silicon (DSi) or as dissolvable amorphous silica (ASi). Silicon is a key nutrient in promoting marine primary productivity, contributing to atmospheric CO 2 removal. We present the current understanding of Si cycling in glacial systems, focusing on the Si isotope (δ 30 Si) composition of glacial meltwaters. We combine existing glacial δ 30 Si data with new measurements from 20 sub-Arctic glaciers, showing that glacial meltwaters consistently export isotopically light DSi compared with non-glacial rivers (+0.16‰ versus +1.38‰). Glacial δ 30 Si ASi composition ranges from −0.05‰ to −0.86‰ but exhibits low seasonal variability. Silicon fluxes and δ 30 Si composition from glacial systems are not commonly included in global Si budgets and isotopic mass balance calculations at present. We discuss outstanding questions, including the formation mechanism of ASi and the export of glacial nutrients from fjords. Finally, we provide a contextual framework for the recent advances in our understanding of subglacial Si cycling and highlight critical research avenues for assessing potential future changes in these environments. Article in Journal/Newspaper Arctic The Royal Society Arctic Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475 2228 20190098 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Glacial environments play an important role in high-latitude marine nutrient cycling, potentially contributing significant fluxes of silicon (Si) to the polar oceans, either as dissolved silicon (DSi) or as dissolvable amorphous silica (ASi). Silicon is a key nutrient in promoting marine primary productivity, contributing to atmospheric CO 2 removal. We present the current understanding of Si cycling in glacial systems, focusing on the Si isotope (δ 30 Si) composition of glacial meltwaters. We combine existing glacial δ 30 Si data with new measurements from 20 sub-Arctic glaciers, showing that glacial meltwaters consistently export isotopically light DSi compared with non-glacial rivers (+0.16‰ versus +1.38‰). Glacial δ 30 Si ASi composition ranges from −0.05‰ to −0.86‰ but exhibits low seasonal variability. Silicon fluxes and δ 30 Si composition from glacial systems are not commonly included in global Si budgets and isotopic mass balance calculations at present. We discuss outstanding questions, including the formation mechanism of ASi and the export of glacial nutrients from fjords. Finally, we provide a contextual framework for the recent advances in our understanding of subglacial Si cycling and highlight critical research avenues for assessing potential future changes in these environments. |
author2 |
European Research Council Royal Society European Commission Horizon 2020 Marie Skłodowska-Curie Actions fellowship Leverhulme Trust Grantová Agentura České Republiky Charles University Research Centre Program |
format |
Article in Journal/Newspaper |
author |
Hatton, Jade E. Hendry, Katharine R. Hawkings, Jonathan R. Wadham, Jemma L. Opfergelt, Sophie Kohler, Tyler J. Yde, Jacob C. Stibal, Marek Žárský, Jakub D. |
spellingShingle |
Hatton, Jade E. Hendry, Katharine R. Hawkings, Jonathan R. Wadham, Jemma L. Opfergelt, Sophie Kohler, Tyler J. Yde, Jacob C. Stibal, Marek Žárský, Jakub D. Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
author_facet |
Hatton, Jade E. Hendry, Katharine R. Hawkings, Jonathan R. Wadham, Jemma L. Opfergelt, Sophie Kohler, Tyler J. Yde, Jacob C. Stibal, Marek Žárský, Jakub D. |
author_sort |
Hatton, Jade E. |
title |
Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
title_short |
Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
title_full |
Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
title_fullStr |
Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
title_full_unstemmed |
Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
title_sort |
silicon isotopes in arctic and sub-arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle |
publisher |
The Royal Society |
publishDate |
2019 |
url |
http://dx.doi.org/10.1098/rspa.2019.0098 https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2019.0098 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspa.2019.0098 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 475, issue 2228, page 20190098 ISSN 1364-5021 1471-2946 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspa.2019.0098 |
container_title |
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
475 |
container_issue |
2228 |
container_start_page |
20190098 |
_version_ |
1812810471762296832 |