The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf
Approximately half of the freshwater discharged from the Greenland and Antarctic Ice Sheets enters the ocean subsurface as a result of basal ice melt, or runoff draining via the grounding line of a deep ice shelf or marine-terminating glacier. Around Antarctica and parts of northern Greenland, this...
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ftpubmed:oai:pubmedcentral.nih.gov:8144390 2023-05-15T13:58:05+02:00 The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf Krisch, Stephan Hopwood, Mark James Schaffer, Janin Al-Hashem, Ali Höfer, Juan Rutgers van der Loeff, Michiel M. Conway, Tim M. Summers, Brent A. Lodeiro, Pablo Ardiningsih, Indah Steffens, Tim Achterberg, Eric Pieter 2021-05-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8144390/ http://www.ncbi.nlm.nih.gov/pubmed/34031401 https://doi.org/10.1038/s41467-021-23093-0 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8144390/ http://www.ncbi.nlm.nih.gov/pubmed/34031401 http://dx.doi.org/10.1038/s41467-021-23093-0 © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Nat Commun Article Text 2021 ftpubmed https://doi.org/10.1038/s41467-021-23093-0 2021-06-13T00:23:01Z Approximately half of the freshwater discharged from the Greenland and Antarctic Ice Sheets enters the ocean subsurface as a result of basal ice melt, or runoff draining via the grounding line of a deep ice shelf or marine-terminating glacier. Around Antarctica and parts of northern Greenland, this freshwater then experiences prolonged residence times in large cavities beneath floating ice tongues. Due to the inaccessibility of these cavities, it is unclear how they moderate the freshwater associated supply of nutrients such as iron (Fe) to the ocean. Here, we show that subglacial dissolved Fe export from Nioghalvfjerdsbrae (the ‘79°N Glacier’) is decoupled from particulate inputs including freshwater Fe supply, likely due to the prolonged ~162-day residence time of Atlantic water beneath Greenland’s largest floating ice-tongue. Our findings indicate that the overturning rate and particle-dissolved phase exchanges in ice cavities exert a dominant control on subglacial nutrient supply to shelf regions. Text Antarc* Antarctic Antarctica glacier Greenland Ice Shelf PubMed Central (PMC) Antarctic Greenland Nature Communications 12 1 |
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Article Krisch, Stephan Hopwood, Mark James Schaffer, Janin Al-Hashem, Ali Höfer, Juan Rutgers van der Loeff, Michiel M. Conway, Tim M. Summers, Brent A. Lodeiro, Pablo Ardiningsih, Indah Steffens, Tim Achterberg, Eric Pieter The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
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Article |
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Approximately half of the freshwater discharged from the Greenland and Antarctic Ice Sheets enters the ocean subsurface as a result of basal ice melt, or runoff draining via the grounding line of a deep ice shelf or marine-terminating glacier. Around Antarctica and parts of northern Greenland, this freshwater then experiences prolonged residence times in large cavities beneath floating ice tongues. Due to the inaccessibility of these cavities, it is unclear how they moderate the freshwater associated supply of nutrients such as iron (Fe) to the ocean. Here, we show that subglacial dissolved Fe export from Nioghalvfjerdsbrae (the ‘79°N Glacier’) is decoupled from particulate inputs including freshwater Fe supply, likely due to the prolonged ~162-day residence time of Atlantic water beneath Greenland’s largest floating ice-tongue. Our findings indicate that the overturning rate and particle-dissolved phase exchanges in ice cavities exert a dominant control on subglacial nutrient supply to shelf regions. |
format |
Text |
author |
Krisch, Stephan Hopwood, Mark James Schaffer, Janin Al-Hashem, Ali Höfer, Juan Rutgers van der Loeff, Michiel M. Conway, Tim M. Summers, Brent A. Lodeiro, Pablo Ardiningsih, Indah Steffens, Tim Achterberg, Eric Pieter |
author_facet |
Krisch, Stephan Hopwood, Mark James Schaffer, Janin Al-Hashem, Ali Höfer, Juan Rutgers van der Loeff, Michiel M. Conway, Tim M. Summers, Brent A. Lodeiro, Pablo Ardiningsih, Indah Steffens, Tim Achterberg, Eric Pieter |
author_sort |
Krisch, Stephan |
title |
The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
title_short |
The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
title_full |
The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
title_fullStr |
The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
title_full_unstemmed |
The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
title_sort |
79°n glacier cavity modulates subglacial iron export to the ne greenland shelf |
publisher |
Nature Publishing Group UK |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8144390/ http://www.ncbi.nlm.nih.gov/pubmed/34031401 https://doi.org/10.1038/s41467-021-23093-0 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica glacier Greenland Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica glacier Greenland Ice Shelf |
op_source |
Nat Commun |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8144390/ http://www.ncbi.nlm.nih.gov/pubmed/34031401 http://dx.doi.org/10.1038/s41467-021-23093-0 |
op_rights |
© The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41467-021-23093-0 |
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Nature Communications |
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12 |
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1 |
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1766266105323585536 |