The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum
Marine sediment records suggest that episodes of major atmospheric CO2 drawdown during the last glacial period were linked to iron (Fe) fertilization of subantarctic surface waters. The principal source of this Fe is thought to be dust transported from southern mid-latitude deserts. However, uncerta...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Nature Publishing Group
2017
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472753/ http://www.ncbi.nlm.nih.gov/pubmed/28598412 https://doi.org/10.1038/ncomms15425 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:5472753 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:5472753 2023-05-15T13:44:35+02:00 The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum Frisia, Silvia Weyrich, Laura S. Hellstrom, John Borsato, Andrea Golledge, Nicholas R. Anesio, Alexandre M. Bajo, Petra Drysdale, Russell N. Augustinus, Paul C. Rivard, Camille Cooper, Alan 2017-06-09 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472753/ http://www.ncbi.nlm.nih.gov/pubmed/28598412 https://doi.org/10.1038/ncomms15425 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472753/ http://www.ncbi.nlm.nih.gov/pubmed/28598412 http://dx.doi.org/10.1038/ncomms15425 Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2017 ftpubmed https://doi.org/10.1038/ncomms15425 2017-07-02T00:04:51Z Marine sediment records suggest that episodes of major atmospheric CO2 drawdown during the last glacial period were linked to iron (Fe) fertilization of subantarctic surface waters. The principal source of this Fe is thought to be dust transported from southern mid-latitude deserts. However, uncertainty exists over contributions to CO2 sequestration from complementary Fe sources, such as the Antarctic ice sheet, due to the difficulty of locating and interrogating suitable archives that have the potential to preserve such information. Here we present petrographic, geochemical and microbial DNA evidence preserved in precisely dated subglacial calcites from close to the East Antarctic Ice-Sheet margin, which together suggest that volcanically-induced drainage of Fe-rich waters during the Last Glacial Maximum could have reached the Southern Ocean. Our results support a significant contribution of Antarctic volcanism to subglacial transport and delivery of nutrients with implications on ocean productivity at peak glacial conditions. Text Antarc* Antarctic Ice Sheet Southern Ocean PubMed Central (PMC) Antarctic East Antarctic Ice Sheet Southern Ocean The Antarctic Nature Communications 8 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Article |
spellingShingle |
Article Frisia, Silvia Weyrich, Laura S. Hellstrom, John Borsato, Andrea Golledge, Nicholas R. Anesio, Alexandre M. Bajo, Petra Drysdale, Russell N. Augustinus, Paul C. Rivard, Camille Cooper, Alan The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum |
topic_facet |
Article |
description |
Marine sediment records suggest that episodes of major atmospheric CO2 drawdown during the last glacial period were linked to iron (Fe) fertilization of subantarctic surface waters. The principal source of this Fe is thought to be dust transported from southern mid-latitude deserts. However, uncertainty exists over contributions to CO2 sequestration from complementary Fe sources, such as the Antarctic ice sheet, due to the difficulty of locating and interrogating suitable archives that have the potential to preserve such information. Here we present petrographic, geochemical and microbial DNA evidence preserved in precisely dated subglacial calcites from close to the East Antarctic Ice-Sheet margin, which together suggest that volcanically-induced drainage of Fe-rich waters during the Last Glacial Maximum could have reached the Southern Ocean. Our results support a significant contribution of Antarctic volcanism to subglacial transport and delivery of nutrients with implications on ocean productivity at peak glacial conditions. |
format |
Text |
author |
Frisia, Silvia Weyrich, Laura S. Hellstrom, John Borsato, Andrea Golledge, Nicholas R. Anesio, Alexandre M. Bajo, Petra Drysdale, Russell N. Augustinus, Paul C. Rivard, Camille Cooper, Alan |
author_facet |
Frisia, Silvia Weyrich, Laura S. Hellstrom, John Borsato, Andrea Golledge, Nicholas R. Anesio, Alexandre M. Bajo, Petra Drysdale, Russell N. Augustinus, Paul C. Rivard, Camille Cooper, Alan |
author_sort |
Frisia, Silvia |
title |
The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum |
title_short |
The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum |
title_full |
The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum |
title_fullStr |
The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum |
title_full_unstemmed |
The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum |
title_sort |
influence of antarctic subglacial volcanism on the global iron cycle during the last glacial maximum |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472753/ http://www.ncbi.nlm.nih.gov/pubmed/28598412 https://doi.org/10.1038/ncomms15425 |
geographic |
Antarctic East Antarctic Ice Sheet Southern Ocean The Antarctic |
geographic_facet |
Antarctic East Antarctic Ice Sheet Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472753/ http://www.ncbi.nlm.nih.gov/pubmed/28598412 http://dx.doi.org/10.1038/ncomms15425 |
op_rights |
Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms15425 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766203800312348672 |