Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom
During the 13 day Southern Ocean Iron RElease Experiment (SOIREE), dissolved iron concentrations decreased rapidly following each of three iron-enrichments, but remained high (> 1 nM, up to 80% as FeII) after the fourth and final enrichment on day 8. The former trend was mainly due to dilution (s...
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American Geophysical Union
2001
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Online Access: | https://doi.org/10.1029/2001GL013023 http://ecite.utas.edu.au/26316 |
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ftunivtasecite:oai:ecite.utas.edu.au:26316 2023-05-15T18:24:54+02:00 Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom Croot, PL Bowie, AR Frew, RD Maldonado, MT Hall, JA Safi, KL Roche, JL Boyd, PW Law, CS 2001 https://doi.org/10.1029/2001GL013023 http://ecite.utas.edu.au/26316 en eng American Geophysical Union http://dx.doi.org/10.1029/2001GL013023 Croot, PL and Bowie, AR and Frew, RD and Maldonado, MT and Hall, JA and Safi, KL and Roche, JL and Boyd, PW and Law, CS, Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom, Geophysical Research Letters, 28, (18) pp. 3425-3428. ISSN 0094-8276 (2001) [Refereed Article] http://ecite.utas.edu.au/26316 Earth Sciences Oceanography Chemical Oceanography Refereed Article PeerReviewed 2001 ftunivtasecite https://doi.org/10.1029/2001GL013023 2019-12-13T21:07:17Z During the 13 day Southern Ocean Iron RElease Experiment (SOIREE), dissolved iron concentrations decreased rapidly following each of three iron-enrichments, but remained high (> 1 nM, up to 80% as FeII) after the fourth and final enrichment on day 8. The former trend was mainly due to dilution (spreading of iron-fertilized waters) and particle scavenging. The latter may only be explained by a joint production-maintenance mechanism; photoreduction is the only candidate process able to produce sufficiently high FeII, but as such levels persisted overnight (8 hr dark period) - ten times the half-life for this species - a maintenance mechanism (complexation of FeII) is required, and is supported by evidence of increased ligand concentrations on day 12. The source of these ligands and their affinity for FeII is not known. This retention of iron probably permitted the longevity of this bloom raising fundamental questions about iron cycling in HNLC (High Nitrate Low Chlorophyll) Polar waters. Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean Geophysical Research Letters 28 18 3425 3428 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical Oceanography |
spellingShingle |
Earth Sciences Oceanography Chemical Oceanography Croot, PL Bowie, AR Frew, RD Maldonado, MT Hall, JA Safi, KL Roche, JL Boyd, PW Law, CS Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom |
topic_facet |
Earth Sciences Oceanography Chemical Oceanography |
description |
During the 13 day Southern Ocean Iron RElease Experiment (SOIREE), dissolved iron concentrations decreased rapidly following each of three iron-enrichments, but remained high (> 1 nM, up to 80% as FeII) after the fourth and final enrichment on day 8. The former trend was mainly due to dilution (spreading of iron-fertilized waters) and particle scavenging. The latter may only be explained by a joint production-maintenance mechanism; photoreduction is the only candidate process able to produce sufficiently high FeII, but as such levels persisted overnight (8 hr dark period) - ten times the half-life for this species - a maintenance mechanism (complexation of FeII) is required, and is supported by evidence of increased ligand concentrations on day 12. The source of these ligands and their affinity for FeII is not known. This retention of iron probably permitted the longevity of this bloom raising fundamental questions about iron cycling in HNLC (High Nitrate Low Chlorophyll) Polar waters. |
format |
Article in Journal/Newspaper |
author |
Croot, PL Bowie, AR Frew, RD Maldonado, MT Hall, JA Safi, KL Roche, JL Boyd, PW Law, CS |
author_facet |
Croot, PL Bowie, AR Frew, RD Maldonado, MT Hall, JA Safi, KL Roche, JL Boyd, PW Law, CS |
author_sort |
Croot, PL |
title |
Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom |
title_short |
Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom |
title_full |
Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom |
title_fullStr |
Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom |
title_full_unstemmed |
Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom |
title_sort |
retention of dissolved iron and fe ii in an iron induced southern ocean phytoplankton bloom |
publisher |
American Geophysical Union |
publishDate |
2001 |
url |
https://doi.org/10.1029/2001GL013023 http://ecite.utas.edu.au/26316 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://dx.doi.org/10.1029/2001GL013023 Croot, PL and Bowie, AR and Frew, RD and Maldonado, MT and Hall, JA and Safi, KL and Roche, JL and Boyd, PW and Law, CS, Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom, Geophysical Research Letters, 28, (18) pp. 3425-3428. ISSN 0094-8276 (2001) [Refereed Article] http://ecite.utas.edu.au/26316 |
op_doi |
https://doi.org/10.1029/2001GL013023 |
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Geophysical Research Letters |
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28 |
container_issue |
18 |
container_start_page |
3425 |
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3428 |
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1766205917075865600 |