Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx
Glaciers and ice sheets export significant amounts of silicon (Si) to downstream ecosystems, impacting local and potentially global biogeochemical cycles. Recent studies have shown Si in Arctic glacial meltwaters to have an isotopically distinct signature when compared to non-glacial rivers. This is...
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ftfrontimediafig:oai:figshare.com:article/12651209 2023-05-15T14:04:47+02:00 Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx Jade E. Hatton Katharine R. Hendry Catherine Hirst Sophie Opfergelt Susann Henkel Adrián Silva-Busso Susan A. Welch Jemma L. Wadham W. Berry Lyons Elizabeth Bagshaw Michael Staubwasser Diane M. McKnight 2020-07-14T05:24:14Z https://doi.org/10.3389/feart.2020.00286.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Silicon_Isotopic_Composition_of_Dry_and_Wet-Based_Glaciers_in_Antarctica_docx/12651209 unknown doi:10.3389/feart.2020.00286.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Silicon_Isotopic_Composition_of_Dry_and_Wet-Based_Glaciers_in_Antarctica_docx/12651209 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change silicon isotope geochemistry Antarctica stream weathering subglacial weathering silicon cycle Dataset 2020 ftfrontimediafig https://doi.org/10.3389/feart.2020.00286.s001 2020-07-15T22:54:11Z Glaciers and ice sheets export significant amounts of silicon (Si) to downstream ecosystems, impacting local and potentially global biogeochemical cycles. Recent studies have shown Si in Arctic glacial meltwaters to have an isotopically distinct signature when compared to non-glacial rivers. This is likely linked to subglacial weathering processes and mechanochemical reactions. However, there are currently no silicon isotope (δ 30 Si) data available from meltwater streams in Antarctica, limiting the current inferences on global glacial silicon isotopic composition and its drivers. To address this gap, we present dissolved silicon (DSi), δ 30 Si DSi , and major ion data from meltwater streams draining a polythermal glacier in the region of the West Antarctic Peninsula (WAP; King George Island) and a cold-based glacier in East Antarctica [Commonwealth Stream, McMurdo Dry Valleys (MDV)]. These data, alongside other global datasets, improve our understanding of how contrasting glacier thermal regime can impact upon Si cycling and therefore the δ 30 Si DSi composition. We find a similar δ 30 Si DSi composition between the two sites, with the streams on King George Island varying between -0.23 and +1.23‰ and the Commonwealth stream varying from -0.40 to +1.14‰. However, meltwater streams in King George Island have higher DSi concentrations, and the two glacial systems exhibit opposite DSi – δ 30 Si DSi trends. These contrasts likely result from differences in weathering processes, specifically the role of subglacial processes (King George Island) and, supraglacial processes followed by in-stream weathering in hyporheic zones (Commonwealth Stream). These findings are important when considering likely changes in nutrient fluxes from Antarctic glaciers under climatic warming scenarios and consequent shifts in glacial thermal regimes. Dataset Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Climate change Cold-based glacier East Antarctica King George Island McMurdo Dry Valleys Frontiers: Figshare Arctic Antarctic Antarctic Peninsula East Antarctica King George Island McMurdo Dry Valleys Commonwealth Stream ENVELOPE(163.500,163.500,-77.583,-77.583) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change silicon isotope geochemistry Antarctica stream weathering subglacial weathering silicon cycle |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change silicon isotope geochemistry Antarctica stream weathering subglacial weathering silicon cycle Jade E. Hatton Katharine R. Hendry Catherine Hirst Sophie Opfergelt Susann Henkel Adrián Silva-Busso Susan A. Welch Jemma L. Wadham W. Berry Lyons Elizabeth Bagshaw Michael Staubwasser Diane M. McKnight Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change silicon isotope geochemistry Antarctica stream weathering subglacial weathering silicon cycle |
description |
Glaciers and ice sheets export significant amounts of silicon (Si) to downstream ecosystems, impacting local and potentially global biogeochemical cycles. Recent studies have shown Si in Arctic glacial meltwaters to have an isotopically distinct signature when compared to non-glacial rivers. This is likely linked to subglacial weathering processes and mechanochemical reactions. However, there are currently no silicon isotope (δ 30 Si) data available from meltwater streams in Antarctica, limiting the current inferences on global glacial silicon isotopic composition and its drivers. To address this gap, we present dissolved silicon (DSi), δ 30 Si DSi , and major ion data from meltwater streams draining a polythermal glacier in the region of the West Antarctic Peninsula (WAP; King George Island) and a cold-based glacier in East Antarctica [Commonwealth Stream, McMurdo Dry Valleys (MDV)]. These data, alongside other global datasets, improve our understanding of how contrasting glacier thermal regime can impact upon Si cycling and therefore the δ 30 Si DSi composition. We find a similar δ 30 Si DSi composition between the two sites, with the streams on King George Island varying between -0.23 and +1.23‰ and the Commonwealth stream varying from -0.40 to +1.14‰. However, meltwater streams in King George Island have higher DSi concentrations, and the two glacial systems exhibit opposite DSi – δ 30 Si DSi trends. These contrasts likely result from differences in weathering processes, specifically the role of subglacial processes (King George Island) and, supraglacial processes followed by in-stream weathering in hyporheic zones (Commonwealth Stream). These findings are important when considering likely changes in nutrient fluxes from Antarctic glaciers under climatic warming scenarios and consequent shifts in glacial thermal regimes. |
format |
Dataset |
author |
Jade E. Hatton Katharine R. Hendry Catherine Hirst Sophie Opfergelt Susann Henkel Adrián Silva-Busso Susan A. Welch Jemma L. Wadham W. Berry Lyons Elizabeth Bagshaw Michael Staubwasser Diane M. McKnight |
author_facet |
Jade E. Hatton Katharine R. Hendry Catherine Hirst Sophie Opfergelt Susann Henkel Adrián Silva-Busso Susan A. Welch Jemma L. Wadham W. Berry Lyons Elizabeth Bagshaw Michael Staubwasser Diane M. McKnight |
author_sort |
Jade E. Hatton |
title |
Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx |
title_short |
Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx |
title_full |
Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx |
title_fullStr |
Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx |
title_full_unstemmed |
Data_Sheet_1_Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica.docx |
title_sort |
data_sheet_1_silicon isotopic composition of dry and wet-based glaciers in antarctica.docx |
publishDate |
2020 |
url |
https://doi.org/10.3389/feart.2020.00286.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Silicon_Isotopic_Composition_of_Dry_and_Wet-Based_Glaciers_in_Antarctica_docx/12651209 |
long_lat |
ENVELOPE(163.500,163.500,-77.583,-77.583) |
geographic |
Arctic Antarctic Antarctic Peninsula East Antarctica King George Island McMurdo Dry Valleys Commonwealth Stream |
geographic_facet |
Arctic Antarctic Antarctic Peninsula East Antarctica King George Island McMurdo Dry Valleys Commonwealth Stream |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Climate change Cold-based glacier East Antarctica King George Island McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Climate change Cold-based glacier East Antarctica King George Island McMurdo Dry Valleys |
op_relation |
doi:10.3389/feart.2020.00286.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Silicon_Isotopic_Composition_of_Dry_and_Wet-Based_Glaciers_in_Antarctica_docx/12651209 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2020.00286.s001 |
_version_ |
1766276076762300416 |