Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica Article Swipe
Jade Hatton
,
Katharine 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
·
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.3389/feart.2020.00286
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.3389/feart.2020.00286
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 (d30Si) 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), d30SiDSi, 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 d30SiDSi composition. We find a similar d30SiDSi composition between the two sites, with the streams on King George Island varying between -0.23 and C1.23h and the Commonwealth stream varying from - 0.40 to C1.14h. However, meltwater streams in King George Island have higher DSi concentrations, and the two glacial systems exhibit opposite DSi – d30SiDSi 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.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3389/feart.2020.00286
- OA Status
- gold
- Cited By
- 11
- References
- 210
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3037781965
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3037781965Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3389/feart.2020.00286Digital Object Identifier
- Title
-
Silicon Isotopic Composition of Dry and Wet-Based Glaciers in AntarcticaWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2020Year of publication
- Publication date
-
2020-07-14Full publication date if available
- Authors
-
Jade Hatton, Katharine 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. McKnightList of authors in order
- Landing page
-
https://doi.org/10.3389/feart.2020.00286Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
-
https://doi.org/10.3389/feart.2020.00286Direct OA link when available
- Concepts
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Meltwater, Glacier, Glacial period, Geology, Biogeochemical cycle, Weathering, STREAMS, Physical geography, Oceanography, Deglaciation, Hydrology (agriculture), Earth science, Geomorphology, Ecology, Geography, Biology, Geotechnical engineering, Computer network, Computer scienceTop concepts (fields/topics) attached by OpenAlex
- Cited by
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11Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2, 2024: 1, 2023: 1, 2022: 3, 2021: 4Per-year citation counts (last 5 years)
- References (count)
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210Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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