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 signiï¬cant 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 pr...
Published in: | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | http://hdl.handle.net/2078.1/219068 https://doi.org/10.1098/rspa.2019.0098 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:219068 2024-05-12T07:59:31+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. UCL - SST/ELI/ELIE - Environmental Sciences 2019 http://hdl.handle.net/2078.1/219068 https://doi.org/10.1098/rspa.2019.0098 eng eng The Royal Society boreal:219068 http://hdl.handle.net/2078.1/219068 doi:10.1098/rspa.2019.0098 urn:ISSN:1364-5021 urn:EISSN:1471-2946 info:eu-repo/semantics/openAccess Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 475, no.2228, p. 20190098 (2019) subglacial weathring silicon isotopes silicon cycle glaciers and ice sheets info:eu-repo/semantics/article 2019 ftunistlouisbrus https://doi.org/10.1098/rspa.2019.0098 2024-04-18T17:26:22Z Glacial environments play an important role in high-latitude marine nutrient cycling, potentially contributing signiï¬cant 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, contributingto atmosphericCO2 removal.We present the current understanding of Si cycling in glacial systems,focusingontheSiisotope(δ30Si)composition of glacial meltwaters. We combine existing glacial δ30Si data with new measurements from 20 subArctic glaciers, showing that glacial meltwaters consistently export isotopically light DSi compared with non-glacial rivers (+0.16‰ versus +1.38‰). Glacial δ30SiASi composition ranges from −0.05‰ to −0.86‰ but exhibits low seasonal variability. Silicon fluxes and δ30Si 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 Subarctic DIAL@USL-B (Université Saint-Louis, Bruxelles) Arctic Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475 2228 20190098 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
subglacial weathring silicon isotopes silicon cycle glaciers and ice sheets |
spellingShingle |
subglacial weathring silicon isotopes silicon cycle glaciers and ice sheets 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 |
subglacial weathring silicon isotopes silicon cycle glaciers and ice sheets |
description |
Glacial environments play an important role in high-latitude marine nutrient cycling, potentially contributing signiï¬cant 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, contributingto atmosphericCO2 removal.We present the current understanding of Si cycling in glacial systems,focusingontheSiisotope(δ30Si)composition of glacial meltwaters. We combine existing glacial δ30Si data with new measurements from 20 subArctic glaciers, showing that glacial meltwaters consistently export isotopically light DSi compared with non-glacial rivers (+0.16‰ versus +1.38‰). Glacial δ30SiASi composition ranges from −0.05‰ to −0.86‰ but exhibits low seasonal variability. Silicon fluxes and δ30Si 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 |
UCL - SST/ELI/ELIE - Environmental Sciences |
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. |
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://hdl.handle.net/2078.1/219068 https://doi.org/10.1098/rspa.2019.0098 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Subarctic |
genre_facet |
Arctic Subarctic |
op_source |
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 475, no.2228, p. 20190098 (2019) |
op_relation |
boreal:219068 http://hdl.handle.net/2078.1/219068 doi:10.1098/rspa.2019.0098 urn:ISSN:1364-5021 urn:EISSN:1471-2946 |
op_rights |
info:eu-repo/semantics/openAccess |
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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1798840890878328832 |