The impact of different external sources of iron on the global carbon cycle
International audience Variable supply of iron to the ocean is often invoked to explain part of past changes in atmospheric CO2 (CO2atm). Using model simulations, we find that CO2atm is sensitive on the order of 15, 2, and 1 ppm to sedimentary, dust, and hydrothermal iron input. CO2atm is insensitiv...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.science/hal-01128894 https://hal.science/hal-01128894/document https://hal.science/hal-01128894/file/2013GL059059.pdf https://doi.org/10.1002/2013GL059059 |
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ftinsu:oai:HAL:hal-01128894v1 2024-04-28T08:39:32+00:00 The impact of different external sources of iron on the global carbon cycle Tagliabue, Alessandro Aumont, Olivier Bopp, Laurent Department of Earth Ocean and Ecological Sciences Liverpool University of Liverpool Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 2014-02-16 https://hal.science/hal-01128894 https://hal.science/hal-01128894/document https://hal.science/hal-01128894/file/2013GL059059.pdf https://doi.org/10.1002/2013GL059059 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GL059059 hal-01128894 https://hal.science/hal-01128894 https://hal.science/hal-01128894/document https://hal.science/hal-01128894/file/2013GL059059.pdf doi:10.1002/2013GL059059 IRD: fdi:010061919 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-01128894 Geophysical Research Letters, 2014, 41 (3), pp.920-926. ⟨10.1002/2013GL059059⟩ ocean biogeochemistry phytoplankton iron carbon [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2014 ftinsu https://doi.org/10.1002/2013GL059059 2024-04-05T00:37:31Z International audience Variable supply of iron to the ocean is often invoked to explain part of past changes in atmospheric CO2 (CO2atm). Using model simulations, we find that CO2atm is sensitive on the order of 15, 2, and 1 ppm to sedimentary, dust, and hydrothermal iron input. CO2atm is insensitive to dust because it is not the major iron input to the Southern Ocean. Modifications to the relative export of Si(OH)4 to low latitudes are opposite to those predicted previously. Although hydrothermalism is the major control on the iron inventory in ~25% of the ocean, it remains restricted to the deep ocean, with minor effects on CO2atm. Nevertheless, uncertainties regarding the iron-binding ligand pool can have significant impacts on CO2atm. Ongoing expansion of iron observations as part of GEOTRACES will be invaluable in refining these results. Article in Journal/Newspaper Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Geophysical Research Letters 41 3 920 926 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
ocean biogeochemistry phytoplankton iron carbon [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
ocean biogeochemistry phytoplankton iron carbon [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Tagliabue, Alessandro Aumont, Olivier Bopp, Laurent The impact of different external sources of iron on the global carbon cycle |
topic_facet |
ocean biogeochemistry phytoplankton iron carbon [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Variable supply of iron to the ocean is often invoked to explain part of past changes in atmospheric CO2 (CO2atm). Using model simulations, we find that CO2atm is sensitive on the order of 15, 2, and 1 ppm to sedimentary, dust, and hydrothermal iron input. CO2atm is insensitive to dust because it is not the major iron input to the Southern Ocean. Modifications to the relative export of Si(OH)4 to low latitudes are opposite to those predicted previously. Although hydrothermalism is the major control on the iron inventory in ~25% of the ocean, it remains restricted to the deep ocean, with minor effects on CO2atm. Nevertheless, uncertainties regarding the iron-binding ligand pool can have significant impacts on CO2atm. Ongoing expansion of iron observations as part of GEOTRACES will be invaluable in refining these results. |
author2 |
Department of Earth Ocean and Ecological Sciences Liverpool University of Liverpool Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
format |
Article in Journal/Newspaper |
author |
Tagliabue, Alessandro Aumont, Olivier Bopp, Laurent |
author_facet |
Tagliabue, Alessandro Aumont, Olivier Bopp, Laurent |
author_sort |
Tagliabue, Alessandro |
title |
The impact of different external sources of iron on the global carbon cycle |
title_short |
The impact of different external sources of iron on the global carbon cycle |
title_full |
The impact of different external sources of iron on the global carbon cycle |
title_fullStr |
The impact of different external sources of iron on the global carbon cycle |
title_full_unstemmed |
The impact of different external sources of iron on the global carbon cycle |
title_sort |
impact of different external sources of iron on the global carbon cycle |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01128894 https://hal.science/hal-01128894/document https://hal.science/hal-01128894/file/2013GL059059.pdf https://doi.org/10.1002/2013GL059059 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-01128894 Geophysical Research Letters, 2014, 41 (3), pp.920-926. ⟨10.1002/2013GL059059⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GL059059 hal-01128894 https://hal.science/hal-01128894 https://hal.science/hal-01128894/document https://hal.science/hal-01128894/file/2013GL059059.pdf doi:10.1002/2013GL059059 IRD: fdi:010061919 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2013GL059059 |
container_title |
Geophysical Research Letters |
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41 |
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3 |
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920 |
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926 |
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