Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment
An in situ iron enrichment experiment was carried out in the Southern Ocean Polar Frontal Zone and fertilized a patch of water within an eddy of the Antarctic Circumpolar Current (EisenEx, Nov. 2000). During the experiment, a physical speciation technique was used for iron analysis in order to under...
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Format: | Dataset |
Language: | English |
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PANGAEA
2005
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.770165 https://doi.org/10.1594/PANGAEA.770165 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.770165 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
A5 Ammonium ANT-XVIII/2 B3 B4 Bottle number C3 Colorometric autoanalysis D3 Date/Time of event DEPTH water E3 EisenEx Elevation of event European Iron Enrichment Experiment in the Southern Ocean Event label F3 GOFLO Go-Flo bottles Iron colloidal dissolved particulate soluble Latitude of event Longitude of event Nitrate Nitrate and Nitrite Nitrite Phosphate Polarstern PS58/006-4 PS58/007-6 PS58/009-7 PS58/011-7 PS58/012-2 PS58/014-7 PS58/016-2 PS58/020-2 PS58/023-2 PS58/028-2 PS58/031-2 PS58/038-6 PS58/041-3 PS58/045-3 |
spellingShingle |
A5 Ammonium ANT-XVIII/2 B3 B4 Bottle number C3 Colorometric autoanalysis D3 Date/Time of event DEPTH water E3 EisenEx Elevation of event European Iron Enrichment Experiment in the Southern Ocean Event label F3 GOFLO Go-Flo bottles Iron colloidal dissolved particulate soluble Latitude of event Longitude of event Nitrate Nitrate and Nitrite Nitrite Phosphate Polarstern PS58/006-4 PS58/007-6 PS58/009-7 PS58/011-7 PS58/012-2 PS58/014-7 PS58/016-2 PS58/020-2 PS58/023-2 PS58/028-2 PS58/031-2 PS58/038-6 PS58/041-3 PS58/045-3 Nishioka, Jun Takeda, Shigenobu de Baar, Hein J W Croot, Peter L Boyé, Marie Laan, Patrick Timmermans, Klaas R Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment |
topic_facet |
A5 Ammonium ANT-XVIII/2 B3 B4 Bottle number C3 Colorometric autoanalysis D3 Date/Time of event DEPTH water E3 EisenEx Elevation of event European Iron Enrichment Experiment in the Southern Ocean Event label F3 GOFLO Go-Flo bottles Iron colloidal dissolved particulate soluble Latitude of event Longitude of event Nitrate Nitrate and Nitrite Nitrite Phosphate Polarstern PS58/006-4 PS58/007-6 PS58/009-7 PS58/011-7 PS58/012-2 PS58/014-7 PS58/016-2 PS58/020-2 PS58/023-2 PS58/028-2 PS58/031-2 PS58/038-6 PS58/041-3 PS58/045-3 |
description |
An in situ iron enrichment experiment was carried out in the Southern Ocean Polar Frontal Zone and fertilized a patch of water within an eddy of the Antarctic Circumpolar Current (EisenEx, Nov. 2000). During the experiment, a physical speciation technique was used for iron analysis in order to understand the changes in iron distribution and size-fractionations, including soluble Fe (<200 kDa), colloidal Fe (200 kDa-0.2 µm) and labile particle Fe (>0.2 µm), throughout the development of the phytoplankton bloom. Prior to the first infusion of iron, dissolved (<0.2 µm) iron concentrations in the ambient surface seawater were extremely low (0.06±0.015 nM) with colloidal iron being a minor fraction. For the iron addition, an acidified FeSO4 solution was released three times over a 23-day period to the eddy. High levels of dissolved iron concentrations (2.0±1.1 nM) were measured in the surface water until 4 days after the first iron infusion. After every iron infusion, when high iron concentrations were observed before storm events, there was a significant correlation between colloidal and dissolved iron concentrations ([Colloidal Fe]=0.7627[Dissolved Fe]+0.0519, R2=0.9346). These results indicate that a roughly constant proportion of colloidal vs. dissolved iron was observed after iron infusion (~76%). Storm events caused a significant decrease in iron concentrations (<0.61 nM in dissolved iron) and changed the proportions of the three iron size-fractions (soluble, colloidal and labile particle). The changes in each iron size-fraction indicate that colloidal iron was eliminated from surface mixed layer more easily than particulate and soluble fractions. Therefore, particle and soluble iron efficiently remain in the mixed layer, probably due to the presence of suspended particles and naturally dissolved organic ligands. Our data suggest that iron removal through colloidal aggregation during phytoplankton bloom should be considered in the oceanic iron cycle. |
format |
Dataset |
author |
Nishioka, Jun Takeda, Shigenobu de Baar, Hein J W Croot, Peter L Boyé, Marie Laan, Patrick Timmermans, Klaas R |
author_facet |
Nishioka, Jun Takeda, Shigenobu de Baar, Hein J W Croot, Peter L Boyé, Marie Laan, Patrick Timmermans, Klaas R |
author_sort |
Nishioka, Jun |
title |
Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment |
title_short |
Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment |
title_full |
Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment |
title_fullStr |
Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment |
title_full_unstemmed |
Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment |
title_sort |
profiles of iron concentration from goflow bottles during the caruso-eisenex experiment |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.770165 https://doi.org/10.1594/PANGAEA.770165 |
op_coverage |
MEDIAN LATITUDE: -48.232258 * MEDIAN LONGITUDE: 20.831125 * SOUTH-BOUND LATITUDE: -52.016167 * WEST-BOUND LONGITUDE: 19.999333 * NORTH-BOUND LATITUDE: -47.668167 * EAST-BOUND LONGITUDE: 21.126500 * DATE/TIME START: 2000-10-31T17:50:00 * DATE/TIME END: 2000-11-29T16:52:00 * MINIMUM DEPTH, water: 20 m * MAXIMUM DEPTH, water: 1000 m |
long_lat |
ENVELOPE(19.999333,21.126500,-47.668167,-52.016167) |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Supplement to: Nishioka, Jun; Takeda, Shigenobu; de Baar, Hein J W; Croot, Peter L; Boyé, Marie; Laan, Patrick; Timmermans, Klaas R (2005): Changes in the concentration of iron in different size fractions during an iron enrichment experiment in the open Southern Ocean. Marine Chemistry, 95(1-2), 51-63, https://doi.org/10.1016/j.marchem.2004.06.040 |
op_relation |
Boyé, Marie; Nishioka, Jun; Croot, Peter L; Laan, Patrick; Timmermans, Klaas R; de Baar, Hein J W (2005): Major deviations of iron complexation during 22 days of a mesoscale iron enrichment in the open Southern Ocean. Marine Chemistry, 96(3-4), 257-271, https://doi.org/10.1016/j.marchem.2005.02.002 Croot, Peter L; Laan, Patrick; Nishioka, Jun; Strass, Volker H; Cisewski, Boris; Boyé, Marie; Timmermans, Klaas R; Bellerby, Richard G J; Goldson, Laura; Nightingale, Philip D; de Baar, Hein J W (2005): Spatial and temporal distribution of Fe(II) and H2O2 during EisenEx, an open ocean mescoscale iron enrichment. Marine Chemistry, 95(1-2), 65-88, https://doi.org/10.1016/j.marchem.2004.06.041 Method for the determination of iron used by CRIEPI (URI: hdl:10013/epic.30802.d001) https://doi.pangaea.de/10.1594/PANGAEA.770165 https://doi.org/10.1594/PANGAEA.770165 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.770165 https://doi.org/10.1016/j.marchem.2004.06.040 https://doi.org/10.1016/j.marchem.2005.02.002 https://doi.org/10.1016/j.marchem.2004.06.041 |
_version_ |
1766261551665250304 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.770165 2023-05-15T13:55:14+02:00 Profiles of iron concentration from GoFlow bottles during the CARUSO-EISENEX experiment Nishioka, Jun Takeda, Shigenobu de Baar, Hein J W Croot, Peter L Boyé, Marie Laan, Patrick Timmermans, Klaas R MEDIAN LATITUDE: -48.232258 * MEDIAN LONGITUDE: 20.831125 * SOUTH-BOUND LATITUDE: -52.016167 * WEST-BOUND LONGITUDE: 19.999333 * NORTH-BOUND LATITUDE: -47.668167 * EAST-BOUND LONGITUDE: 21.126500 * DATE/TIME START: 2000-10-31T17:50:00 * DATE/TIME END: 2000-11-29T16:52:00 * MINIMUM DEPTH, water: 20 m * MAXIMUM DEPTH, water: 1000 m 2005-09-28 text/tab-separated-values, 1891 data points https://doi.pangaea.de/10.1594/PANGAEA.770165 https://doi.org/10.1594/PANGAEA.770165 en eng PANGAEA Boyé, Marie; Nishioka, Jun; Croot, Peter L; Laan, Patrick; Timmermans, Klaas R; de Baar, Hein J W (2005): Major deviations of iron complexation during 22 days of a mesoscale iron enrichment in the open Southern Ocean. Marine Chemistry, 96(3-4), 257-271, https://doi.org/10.1016/j.marchem.2005.02.002 Croot, Peter L; Laan, Patrick; Nishioka, Jun; Strass, Volker H; Cisewski, Boris; Boyé, Marie; Timmermans, Klaas R; Bellerby, Richard G J; Goldson, Laura; Nightingale, Philip D; de Baar, Hein J W (2005): Spatial and temporal distribution of Fe(II) and H2O2 during EisenEx, an open ocean mescoscale iron enrichment. Marine Chemistry, 95(1-2), 65-88, https://doi.org/10.1016/j.marchem.2004.06.041 Method for the determination of iron used by CRIEPI (URI: hdl:10013/epic.30802.d001) https://doi.pangaea.de/10.1594/PANGAEA.770165 https://doi.org/10.1594/PANGAEA.770165 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Nishioka, Jun; Takeda, Shigenobu; de Baar, Hein J W; Croot, Peter L; Boyé, Marie; Laan, Patrick; Timmermans, Klaas R (2005): Changes in the concentration of iron in different size fractions during an iron enrichment experiment in the open Southern Ocean. Marine Chemistry, 95(1-2), 51-63, https://doi.org/10.1016/j.marchem.2004.06.040 A5 Ammonium ANT-XVIII/2 B3 B4 Bottle number C3 Colorometric autoanalysis D3 Date/Time of event DEPTH water E3 EisenEx Elevation of event European Iron Enrichment Experiment in the Southern Ocean Event label F3 GOFLO Go-Flo bottles Iron colloidal dissolved particulate soluble Latitude of event Longitude of event Nitrate Nitrate and Nitrite Nitrite Phosphate Polarstern PS58/006-4 PS58/007-6 PS58/009-7 PS58/011-7 PS58/012-2 PS58/014-7 PS58/016-2 PS58/020-2 PS58/023-2 PS58/028-2 PS58/031-2 PS58/038-6 PS58/041-3 PS58/045-3 Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.770165 https://doi.org/10.1016/j.marchem.2004.06.040 https://doi.org/10.1016/j.marchem.2005.02.002 https://doi.org/10.1016/j.marchem.2004.06.041 2023-01-20T08:52:43Z An in situ iron enrichment experiment was carried out in the Southern Ocean Polar Frontal Zone and fertilized a patch of water within an eddy of the Antarctic Circumpolar Current (EisenEx, Nov. 2000). During the experiment, a physical speciation technique was used for iron analysis in order to understand the changes in iron distribution and size-fractionations, including soluble Fe (<200 kDa), colloidal Fe (200 kDa-0.2 µm) and labile particle Fe (>0.2 µm), throughout the development of the phytoplankton bloom. Prior to the first infusion of iron, dissolved (<0.2 µm) iron concentrations in the ambient surface seawater were extremely low (0.06±0.015 nM) with colloidal iron being a minor fraction. For the iron addition, an acidified FeSO4 solution was released three times over a 23-day period to the eddy. High levels of dissolved iron concentrations (2.0±1.1 nM) were measured in the surface water until 4 days after the first iron infusion. After every iron infusion, when high iron concentrations were observed before storm events, there was a significant correlation between colloidal and dissolved iron concentrations ([Colloidal Fe]=0.7627[Dissolved Fe]+0.0519, R2=0.9346). These results indicate that a roughly constant proportion of colloidal vs. dissolved iron was observed after iron infusion (~76%). Storm events caused a significant decrease in iron concentrations (<0.61 nM in dissolved iron) and changed the proportions of the three iron size-fractions (soluble, colloidal and labile particle). The changes in each iron size-fraction indicate that colloidal iron was eliminated from surface mixed layer more easily than particulate and soluble fractions. Therefore, particle and soluble iron efficiently remain in the mixed layer, probably due to the presence of suspended particles and naturally dissolved organic ligands. Our data suggest that iron removal through colloidal aggregation during phytoplankton bloom should be considered in the oceanic iron cycle. Dataset Antarc* Antarctic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean The Antarctic ENVELOPE(19.999333,21.126500,-47.668167,-52.016167) |