The influence of UV irradiation on the photoreduction of iron in the Southern Ocean
An iron enrichment experiment, EisenEx, was performed in the Atlantic sector of the Southern Ocean during the Antarctic spring of 2000. Deck incubations of open ocean water were performed to investigate the influence of ultraviolet B (UVB: 280-315 nm) and ultraviolet A (UVA: 315-400 nm) on the speci...
Published in: | Marine Chemistry |
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2005
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Online Access: | https://hdl.handle.net/11370/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 https://research.rug.nl/en/publications/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 https://doi.org/10.1016/j.marchem.2004.03.021 |
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ftunigroningenpu:oai:pure.rug.nl:publications/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 2024-09-15T17:45:00+00:00 The influence of UV irradiation on the photoreduction of iron in the Southern Ocean Rijkenberg, M J A Fischer, AC Kroon, JJ Gerringa, LJA Timmermans, KR Wolterbeek, HT de Baar, H J W 2005-01-15 https://hdl.handle.net/11370/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 https://research.rug.nl/en/publications/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 https://doi.org/10.1016/j.marchem.2004.03.021 eng eng https://research.rug.nl/en/publications/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 info:eu-repo/semantics/closedAccess Rijkenberg , M J A , Fischer , AC , Kroon , JJ , Gerringa , LJA , Timmermans , KR , Wolterbeek , HT & de Baar , H J W 2005 , ' The influence of UV irradiation on the photoreduction of iron in the Southern Ocean ' , Marine Chemistry , vol. 93 , no. 2-4 , pp. 119-129 . https://doi.org/10.1016/j.marchem.2004.03.021 iron photoreduction UV Southern Ocean EisenEx LIGHT-INDUCED DISSOLUTION NATURAL ORGANIC-LIGANDS ULTRAVIOLET-RADIATION COLLOIDAL IRON HYDROGEN-PEROXIDE ANTARCTIC WATERS OZONE DEPLETION ATLANTIC-OCEAN PHOTOCHEMICAL PRODUCTION EQUATORIAL PACIFIC article 2005 ftunigroningenpu https://doi.org/10.1016/j.marchem.2004.03.021 2024-07-01T14:49:22Z An iron enrichment experiment, EisenEx, was performed in the Atlantic sector of the Southern Ocean during the Antarctic spring of 2000. Deck incubations of open ocean water were performed to investigate the influence of ultraviolet B (UVB: 280-315 nm) and ultraviolet A (UVA: 315-400 nm) on the speciation of iron in seawater, using an addition of the radioisotopes Fe-59(III) (1.25 nM) or Fe-55(III) (0.5 nM). Seawater was sampled inside and outside the iron-enriched region. The radioisotopic Fe(II) concentration was monitored during daylight under three different light conditions: the full solar spectrum (total), total minus UVB, and total minus UVB+UVA. A distinct diel cycle was observed with a clear distinction between the three different light regimes. A clear linear relationship was found for the concentration of radioisotopic Fe(II) versus irradiance. UVB produced most of the Fe(II) followed by UVA and visible light (VIS: 400-700 nm), respectively. UVB produced 4.89 and 0.69 pM m(2) W-1 radioisotopic Fe(II) followed by UVA with 0.33 and 0.10 pM M-2 W-1 radioisotopic Fe(II) and VIS with 0.04 and 0.03 pM m(2) W-1 radioisotopic Fe(II). (C) 2004 Elsevier B.V All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of Groningen research database Marine Chemistry 93 2-4 119 129 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
iron photoreduction UV Southern Ocean EisenEx LIGHT-INDUCED DISSOLUTION NATURAL ORGANIC-LIGANDS ULTRAVIOLET-RADIATION COLLOIDAL IRON HYDROGEN-PEROXIDE ANTARCTIC WATERS OZONE DEPLETION ATLANTIC-OCEAN PHOTOCHEMICAL PRODUCTION EQUATORIAL PACIFIC |
spellingShingle |
iron photoreduction UV Southern Ocean EisenEx LIGHT-INDUCED DISSOLUTION NATURAL ORGANIC-LIGANDS ULTRAVIOLET-RADIATION COLLOIDAL IRON HYDROGEN-PEROXIDE ANTARCTIC WATERS OZONE DEPLETION ATLANTIC-OCEAN PHOTOCHEMICAL PRODUCTION EQUATORIAL PACIFIC Rijkenberg, M J A Fischer, AC Kroon, JJ Gerringa, LJA Timmermans, KR Wolterbeek, HT de Baar, H J W The influence of UV irradiation on the photoreduction of iron in the Southern Ocean |
topic_facet |
iron photoreduction UV Southern Ocean EisenEx LIGHT-INDUCED DISSOLUTION NATURAL ORGANIC-LIGANDS ULTRAVIOLET-RADIATION COLLOIDAL IRON HYDROGEN-PEROXIDE ANTARCTIC WATERS OZONE DEPLETION ATLANTIC-OCEAN PHOTOCHEMICAL PRODUCTION EQUATORIAL PACIFIC |
description |
An iron enrichment experiment, EisenEx, was performed in the Atlantic sector of the Southern Ocean during the Antarctic spring of 2000. Deck incubations of open ocean water were performed to investigate the influence of ultraviolet B (UVB: 280-315 nm) and ultraviolet A (UVA: 315-400 nm) on the speciation of iron in seawater, using an addition of the radioisotopes Fe-59(III) (1.25 nM) or Fe-55(III) (0.5 nM). Seawater was sampled inside and outside the iron-enriched region. The radioisotopic Fe(II) concentration was monitored during daylight under three different light conditions: the full solar spectrum (total), total minus UVB, and total minus UVB+UVA. A distinct diel cycle was observed with a clear distinction between the three different light regimes. A clear linear relationship was found for the concentration of radioisotopic Fe(II) versus irradiance. UVB produced most of the Fe(II) followed by UVA and visible light (VIS: 400-700 nm), respectively. UVB produced 4.89 and 0.69 pM m(2) W-1 radioisotopic Fe(II) followed by UVA with 0.33 and 0.10 pM M-2 W-1 radioisotopic Fe(II) and VIS with 0.04 and 0.03 pM m(2) W-1 radioisotopic Fe(II). (C) 2004 Elsevier B.V All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Rijkenberg, M J A Fischer, AC Kroon, JJ Gerringa, LJA Timmermans, KR Wolterbeek, HT de Baar, H J W |
author_facet |
Rijkenberg, M J A Fischer, AC Kroon, JJ Gerringa, LJA Timmermans, KR Wolterbeek, HT de Baar, H J W |
author_sort |
Rijkenberg, M J A |
title |
The influence of UV irradiation on the photoreduction of iron in the Southern Ocean |
title_short |
The influence of UV irradiation on the photoreduction of iron in the Southern Ocean |
title_full |
The influence of UV irradiation on the photoreduction of iron in the Southern Ocean |
title_fullStr |
The influence of UV irradiation on the photoreduction of iron in the Southern Ocean |
title_full_unstemmed |
The influence of UV irradiation on the photoreduction of iron in the Southern Ocean |
title_sort |
influence of uv irradiation on the photoreduction of iron in the southern ocean |
publishDate |
2005 |
url |
https://hdl.handle.net/11370/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 https://research.rug.nl/en/publications/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 https://doi.org/10.1016/j.marchem.2004.03.021 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Rijkenberg , M J A , Fischer , AC , Kroon , JJ , Gerringa , LJA , Timmermans , KR , Wolterbeek , HT & de Baar , H J W 2005 , ' The influence of UV irradiation on the photoreduction of iron in the Southern Ocean ' , Marine Chemistry , vol. 93 , no. 2-4 , pp. 119-129 . https://doi.org/10.1016/j.marchem.2004.03.021 |
op_relation |
https://research.rug.nl/en/publications/f49ee38e-eb7c-4dfc-8053-47c01ba562f3 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.marchem.2004.03.021 |
container_title |
Marine Chemistry |
container_volume |
93 |
container_issue |
2-4 |
container_start_page |
119 |
op_container_end_page |
129 |
_version_ |
1810492693771452416 |