Measurement of the isotopic composition of dissolved iron in the open ocean
This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflo...
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Amer Geophysical Union
2008
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Online Access: | https://doi.org/10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://archimer.ifremer.fr/doc/00202/31374/ |
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fttriple:oai:gotriple.eu:10670/1.3yldz5 2023-05-15T18:25:28+02:00 Measurement of the isotopic composition of dissolved iron in the open ocean Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. 2008-01-01 https://doi.org/10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://archimer.ifremer.fr/doc/00202/31374/ en eng Amer Geophysical Union doi:10.1029/2008GL035841 10670/1.3yldz5 https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://archimer.ifremer.fr/doc/00202/31374/ other Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2008-12 , Vol. 35 , N. L24610 , P. 1-5 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2008 fttriple https://doi.org/10.1029/2008GL035841 2023-01-22T17:35:49Z This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow resin and purified using an AG1x4 anion exchange resin. The isotopic ratios are measured with a MC-ICPMS Neptune, coupled with a desolvator (Aridus II), using a Fe-57-Fe-58 double spike mass bias correction. Measurement precision (0.13%, 2SD) allows resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from delta Fe-57 = -0.19 to +0.32 parts per thousand). Isotopically light iron found in the Upper Circumpolar Deep Water is hypothesized to result from organic matter remineralization. Shallow samples suggest that, if occurring, an iron isotopic fractionation during iron uptake by phytoplankton is characterized by a fractionation factor, such as: vertical bar Delta Fe-57((plankton-seawater))vertical bar < 0.48 parts per thousand. Text Southern Ocean Unknown Southern Ocean Geophysical Research Letters 35 24 |
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English |
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envir geo |
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envir geo Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. Measurement of the isotopic composition of dissolved iron in the open ocean |
topic_facet |
envir geo |
description |
This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow resin and purified using an AG1x4 anion exchange resin. The isotopic ratios are measured with a MC-ICPMS Neptune, coupled with a desolvator (Aridus II), using a Fe-57-Fe-58 double spike mass bias correction. Measurement precision (0.13%, 2SD) allows resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from delta Fe-57 = -0.19 to +0.32 parts per thousand). Isotopically light iron found in the Upper Circumpolar Deep Water is hypothesized to result from organic matter remineralization. Shallow samples suggest that, if occurring, an iron isotopic fractionation during iron uptake by phytoplankton is characterized by a fractionation factor, such as: vertical bar Delta Fe-57((plankton-seawater))vertical bar < 0.48 parts per thousand. |
format |
Text |
author |
Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. |
author_facet |
Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. |
author_sort |
Lacan, F. |
title |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_short |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_full |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_fullStr |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_full_unstemmed |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_sort |
measurement of the isotopic composition of dissolved iron in the open ocean |
publisher |
Amer Geophysical Union |
publishDate |
2008 |
url |
https://doi.org/10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://archimer.ifremer.fr/doc/00202/31374/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2008-12 , Vol. 35 , N. L24610 , P. 1-5 |
op_relation |
doi:10.1029/2008GL035841 10670/1.3yldz5 https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://archimer.ifremer.fr/doc/00202/31374/ |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2008GL035841 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
24 |
_version_ |
1766206939970142208 |