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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ftnioz:oai:imis.nioz.nl:338568 2023-05-15T13:47:57+02:00 The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf Krisch, S. Hopwood, M.J. Schaffer, J. Al-Hashem, A. Höfer, J. Rutgers van der Loeff, M. Conway, T.M. Summers, B.A. Lodeiro, P. Ardiningsih, I. Steffens, T. Achterberg, E.P. 2021 application/pdf https://www.vliz.be/imisdocs/publications/83/361983.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000658768600002 info:eu-repo/semantics/altIdentifier/doi/.org/10.1038/s41467-021-23093-0 https://www.vliz.be/imisdocs/publications/83/361983.pdf info:eu-repo/semantics/openAccess %3Ci%3ENature+Comm.+12%281%29%3C%2Fi%3E%3A+3030.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-021-23093-0%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-021-23093-0%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftnioz https://doi.org/10.1038/s41467-021-23093-0 2022-05-01T14:14:37Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica glacier Greenland Ice Shelf NIOZ Repository (Royal Netherlands Institute for Sea Research) Antarctic Greenland Nature Communications 12 1 |
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Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
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 |
Article in Journal/Newspaper |
author |
Krisch, S. Hopwood, M.J. Schaffer, J. Al-Hashem, A. Höfer, J. Rutgers van der Loeff, M. Conway, T.M. Summers, B.A. Lodeiro, P. Ardiningsih, I. Steffens, T. Achterberg, E.P. |
spellingShingle |
Krisch, S. Hopwood, M.J. Schaffer, J. Al-Hashem, A. Höfer, J. Rutgers van der Loeff, M. Conway, T.M. Summers, B.A. Lodeiro, P. Ardiningsih, I. Steffens, T. Achterberg, E.P. The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf |
author_facet |
Krisch, S. Hopwood, M.J. Schaffer, J. Al-Hashem, A. Höfer, J. Rutgers van der Loeff, M. Conway, T.M. Summers, B.A. Lodeiro, P. Ardiningsih, I. Steffens, T. Achterberg, E.P. |
author_sort |
Krisch, S. |
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 |
publishDate |
2021 |
url |
https://www.vliz.be/imisdocs/publications/83/361983.pdf |
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 |
%3Ci%3ENature+Comm.+12%281%29%3C%2Fi%3E%3A+3030.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-021-23093-0%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1038%2Fs41467-021-23093-0%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000658768600002 info:eu-repo/semantics/altIdentifier/doi/.org/10.1038/s41467-021-23093-0 https://www.vliz.be/imisdocs/publications/83/361983.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-021-23093-0 |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766248060024782848 |