The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum
International audience 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 de...
Published in: | Nature Communications |
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ftunivnantes:oai:HAL:hal-01692159v1 2023-05-15T13:37:19+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 Univ Newcastle, Sch Environm & Life Sci, Callaghan, NSW 2308, Australia University of Adelaide Univ Melbourne, Sch Earth Sci, Parkville, Vic 3010, Australia GNS Science Victoria Univ Wellington, Antarctic Res Ctr, Wellington 6140, New Zealand University of Bristol Bristol Univ Melbourne, Sch Geog, Parkville, Vic 3010, Australia Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Univ Auckland, Sch Environm, Auckland 92019, New Zealand European Synchrotron Radiation Facility (ESRF) 2017 https://hal.archives-ouvertes.fr/hal-01692159 https://hal.archives-ouvertes.fr/hal-01692159/document https://hal.archives-ouvertes.fr/hal-01692159/file/Nature_Communications_8_15425.pdf https://doi.org/10.1038/ncomms15425 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms15425 hal-01692159 https://hal.archives-ouvertes.fr/hal-01692159 https://hal.archives-ouvertes.fr/hal-01692159/document https://hal.archives-ouvertes.fr/hal-01692159/file/Nature_Communications_8_15425.pdf doi:10.1038/ncomms15425 info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.archives-ouvertes.fr/hal-01692159 Nature Communications, Nature Publishing Group, 2017, 8, 9 p. ⟨10.1038/ncomms15425⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftunivnantes https://doi.org/10.1038/ncomms15425 2022-09-07T00:18:36Z International audience 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 Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic East Antarctic Ice Sheet Southern Ocean The Antarctic Nature Communications 8 1 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDE]Environmental Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDE]Environmental Sciences 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 |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDE]Environmental Sciences |
description |
International audience 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 |
author2 |
Univ Newcastle, Sch Environm & Life Sci, Callaghan, NSW 2308, Australia University of Adelaide Univ Melbourne, Sch Earth Sci, Parkville, Vic 3010, Australia GNS Science Victoria Univ Wellington, Antarctic Res Ctr, Wellington 6140, New Zealand University of Bristol Bristol Univ Melbourne, Sch Geog, Parkville, Vic 3010, Australia Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Univ Auckland, Sch Environm, Auckland 92019, New Zealand European Synchrotron Radiation Facility (ESRF) |
format |
Article in Journal/Newspaper |
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 |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01692159 https://hal.archives-ouvertes.fr/hal-01692159/document https://hal.archives-ouvertes.fr/hal-01692159/file/Nature_Communications_8_15425.pdf 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_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.archives-ouvertes.fr/hal-01692159 Nature Communications, Nature Publishing Group, 2017, 8, 9 p. ⟨10.1038/ncomms15425⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms15425 hal-01692159 https://hal.archives-ouvertes.fr/hal-01692159 https://hal.archives-ouvertes.fr/hal-01692159/document https://hal.archives-ouvertes.fr/hal-01692159/file/Nature_Communications_8_15425.pdf doi:10.1038/ncomms15425 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/ncomms15425 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766090402032517120 |