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...
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ftpubmed:oai:pubmedcentral.nih.gov:6735475 2023-05-15T14:51:42+02:00 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. 2019-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6735475/ https://doi.org/10.1098/rspa.2019.0098 en eng The Royal Society Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6735475/ http://dx.doi.org/10.1098/rspa.2019.0098 © 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Review Article Text 2019 ftpubmed https://doi.org/10.1098/rspa.2019.0098 2019-09-22T00:22:28Z 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. Text Arctic PubMed Central (PMC) Arctic Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475 2228 20190098 |
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Review Article 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 |
topic_facet |
Review Article |
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. |
format |
Text |
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. |
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 Publishing |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6735475/ https://doi.org/10.1098/rspa.2019.0098 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6735475/ http://dx.doi.org/10.1098/rspa.2019.0098 |
op_rights |
© 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
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 |
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1766322831952445440 |