The impact of different external sources of iron on the global carbon cycle
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...
Published in: | Geophysical Research Letters |
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American Geophysical Union
2014
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/30340 https://doi.org/10.1002/2013GL059059 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/30340 2023-05-15T18:25:20+02:00 The impact of different external sources of iron on the global carbon cycle TAGLIABUE, Alessandro AUMONT, Olivier BOPP, Laurent 2014-02-16 https://oskar-bordeaux.fr/handle/20.500.12278/30340 https://doi.org/10.1002/2013GL059059 en eng American Geophysical Union 0094-8276 https://oskar-bordeaux.fr/handle/20.500.12278/30340 doi:10.1002/2013GL059059 ocean biogeochemistry phytoplankton iron carbon Planète et Univers [physics]/Sciences de la Terre/Océanographie Article de revue 2014 ftoskarbordeaux https://doi.org/10.1002/2013GL059059 2021-05-11T22:31:08Z 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. Other/Unknown Material Southern Ocean OSKAR Bordeaux (Open Science Knowledge ARchive) Southern Ocean Geophysical Research Letters 41 3 920 926 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
ocean biogeochemistry phytoplankton iron carbon Planète et Univers [physics]/Sciences de la Terre/Océanographie |
spellingShingle |
ocean biogeochemistry phytoplankton iron carbon Planète et Univers [physics]/Sciences de la Terre/Océanographie 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 Planète et Univers [physics]/Sciences de la Terre/Océanographie |
description |
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. |
format |
Other/Unknown Material |
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 |
American Geophysical Union |
publishDate |
2014 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/30340 https://doi.org/10.1002/2013GL059059 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
0094-8276 https://oskar-bordeaux.fr/handle/20.500.12278/30340 doi:10.1002/2013GL059059 |
op_doi |
https://doi.org/10.1002/2013GL059059 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
3 |
container_start_page |
920 |
op_container_end_page |
926 |
_version_ |
1766206708307197952 |