Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean
The distribution and speciation of iron was determined along a transect in the eastern Atlantic sector (6°E) of the Southern Ocean during a collaborative Scandinavian/South African Antarctic cruise conducted in late austral summer (December 1997/January 1998). Elevated concentrations of dissolved ir...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.847455 2023-05-15T13:44:47+02:00 Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean Croot, Peter L Andersson, Karen Öztürk, Murat Turner, David R MEDIAN LATITUDE: -54.318463 * MEDIAN LONGITUDE: 5.928025 * SOUTH-BOUND LATITUDE: -60.396670 * WEST-BOUND LONGITUDE: 4.000000 * NORTH-BOUND LATITUDE: -49.420000 * EAST-BOUND LONGITUDE: 6.501670 * DATE/TIME START: 1998-01-02T00:00:00 * DATE/TIME END: 1998-01-29T00:00:00 2004-06-24 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.847455 https://doi.org/10.1594/PANGAEA.847455 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.847455 https://doi.org/10.1594/PANGAEA.847455 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Croot, Peter L; Andersson, Karen; Öztürk, Murat; Turner, David R (2004): The distribution and speciation of iron along 6°E in the Southern Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 51(22-24), 2857-2879, https://doi.org/10.1016/j.dsr2.2003.10.012 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.847455 https://doi.org/10.1016/j.dsr2.2003.10.012 2023-01-20T07:33:28Z The distribution and speciation of iron was determined along a transect in the eastern Atlantic sector (6°E) of the Southern Ocean during a collaborative Scandinavian/South African Antarctic cruise conducted in late austral summer (December 1997/January 1998). Elevated concentrations of dissolved iron (>0.4 nM) were found at 60°S in the vicinity of the Spring Ice Edge (SIE) in tandem with a phytoplankton bloom, chiefly dominated by Phaeocystis sp. This bloom had developed rapidly after the loss of the seasonal sea ice cover. The iron that fuelled this bloom was mostly likely derived from sea ice melt. In the Winter Ice Edge (WIE), around 55°S, dissolved iron concentrations were low (<0.2 nM) and corresponded to lower biological productivity, biomass. In the Antarctic Polar Front, at approximately 50°S, a vertical profile of dissolved iron showed low concentrations (<0.2 nM); however, a surface survey showed higher concentrations (1-3 nM), and considerable patchiness in this dynamic frontal region. The chemical speciation of iron was dominated by organic complexation throughout the study region. Organic iron-complexing ligands ([L]) ranged from 0.9 to 3.0 nM Fe equivalents, with complex stability log K'(FeL) = 21.4-23.5. Estimated concentrations of inorganic iron (Fe') ranged from 0.03 to 0.79 pM, with the highest values found in the Phaeocystis bloom in the SIE. A vertical profile of iron-complexing ligands in the WIE showed a maximum consistent with a biological source for ligand production and near surface minimum possibly consistent with loss via photodecomposition. This work further confirms the role iron that has in the Southern Ocean in limiting primary productivity. Dataset Antarc* Antarctic Arctic Phytoplankton Sea ice Southern Ocean SWEDARP PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic Southern Ocean The Antarctic Austral ENVELOPE(4.000000,6.501670,-49.420000,-60.396670) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
spellingShingle |
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Croot, Peter L Andersson, Karen Öztürk, Murat Turner, David R Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean |
topic_facet |
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
description |
The distribution and speciation of iron was determined along a transect in the eastern Atlantic sector (6°E) of the Southern Ocean during a collaborative Scandinavian/South African Antarctic cruise conducted in late austral summer (December 1997/January 1998). Elevated concentrations of dissolved iron (>0.4 nM) were found at 60°S in the vicinity of the Spring Ice Edge (SIE) in tandem with a phytoplankton bloom, chiefly dominated by Phaeocystis sp. This bloom had developed rapidly after the loss of the seasonal sea ice cover. The iron that fuelled this bloom was mostly likely derived from sea ice melt. In the Winter Ice Edge (WIE), around 55°S, dissolved iron concentrations were low (<0.2 nM) and corresponded to lower biological productivity, biomass. In the Antarctic Polar Front, at approximately 50°S, a vertical profile of dissolved iron showed low concentrations (<0.2 nM); however, a surface survey showed higher concentrations (1-3 nM), and considerable patchiness in this dynamic frontal region. The chemical speciation of iron was dominated by organic complexation throughout the study region. Organic iron-complexing ligands ([L]) ranged from 0.9 to 3.0 nM Fe equivalents, with complex stability log K'(FeL) = 21.4-23.5. Estimated concentrations of inorganic iron (Fe') ranged from 0.03 to 0.79 pM, with the highest values found in the Phaeocystis bloom in the SIE. A vertical profile of iron-complexing ligands in the WIE showed a maximum consistent with a biological source for ligand production and near surface minimum possibly consistent with loss via photodecomposition. This work further confirms the role iron that has in the Southern Ocean in limiting primary productivity. |
format |
Dataset |
author |
Croot, Peter L Andersson, Karen Öztürk, Murat Turner, David R |
author_facet |
Croot, Peter L Andersson, Karen Öztürk, Murat Turner, David R |
author_sort |
Croot, Peter L |
title |
Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean |
title_short |
Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean |
title_full |
Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean |
title_fullStr |
Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean |
title_full_unstemmed |
Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean |
title_sort |
water chemistry and iron speciation in samples taken during swedarp 97/98 campaign with s.a. agulhas to the southern ocean |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.847455 https://doi.org/10.1594/PANGAEA.847455 |
op_coverage |
MEDIAN LATITUDE: -54.318463 * MEDIAN LONGITUDE: 5.928025 * SOUTH-BOUND LATITUDE: -60.396670 * WEST-BOUND LONGITUDE: 4.000000 * NORTH-BOUND LATITUDE: -49.420000 * EAST-BOUND LONGITUDE: 6.501670 * DATE/TIME START: 1998-01-02T00:00:00 * DATE/TIME END: 1998-01-29T00:00:00 |
long_lat |
ENVELOPE(4.000000,6.501670,-49.420000,-60.396670) |
geographic |
Arctic Antarctic Southern Ocean The Antarctic Austral |
geographic_facet |
Arctic Antarctic Southern Ocean The Antarctic Austral |
genre |
Antarc* Antarctic Arctic Phytoplankton Sea ice Southern Ocean SWEDARP |
genre_facet |
Antarc* Antarctic Arctic Phytoplankton Sea ice Southern Ocean SWEDARP |
op_source |
Supplement to: Croot, Peter L; Andersson, Karen; Öztürk, Murat; Turner, David R (2004): The distribution and speciation of iron along 6°E in the Southern Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 51(22-24), 2857-2879, https://doi.org/10.1016/j.dsr2.2003.10.012 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.847455 https://doi.org/10.1594/PANGAEA.847455 |
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.847455 https://doi.org/10.1016/j.dsr2.2003.10.012 |
_version_ |
1766206266751844352 |