An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A
The organic complexation of dissolved iron (Fe) was determined in depth profile samples collected from GEOTRACES Crossover Station A, the Bermuda Atlantic Time-series Study (BATS) site, as part of the Dutch and U.S. GEOTRACES North Atlantic programs in June 2010 and November 2011, respectively. The...
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ftnioz:oai:imis.nioz.nl:282495 2023-05-15T17:34:28+02:00 An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A Buck, K.N. Gerringa, L.J.A. Rijkenberg, M.J.A. 2016 application/pdf https://www.vliz.be/imisdocs/publications/37/298037.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000457358000258 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3389/fmars.2016.00262 https://www.vliz.be/imisdocs/publications/37/298037.pdf info:eu-repo/semantics/openAccess %3Ci%3EFront.+Mar.+Sci.+3%3C%2Fi%3E%3A+262.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3389%2Ffmars.2016.00262%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3389%2Ffmars.2016.00262%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftnioz https://doi.org/10.3389/fmars.2016.00262 2022-05-01T14:04:44Z The organic complexation of dissolved iron (Fe) was determined in depth profile samples collected from GEOTRACES Crossover Station A, the Bermuda Atlantic Time-series Study (BATS) site, as part of the Dutch and U.S. GEOTRACES North Atlantic programs in June 2010 and November 2011, respectively. The two groups employed distinct competitive ligand exchange-adsorptive cathodic stripping voltammetry (CLE-AdCSV) methods, and resulting ligand concentrations and conditional stability constants from each profile were compared. Excellent agreement was found between the total ligand concentrations determined in June 2010 and the strongest, L1-type, ligand concentrations determined in November 2011. Yet a primary distinction between the datasets was the number of ligand classes observed: A single ligand class was characterized in the June 2010 profile while two ligand classes were observed in the November 2011 profile. To assess the role of differing interpretation approaches in determining final results, analysts exchanged titration data, and accompanying parameters from the profiles for reinterpretation. The reinterpretation exercises highlighted the considerable influence of the sensitivity (S) parameter applied on interpretation results, consistent with recent intercalibration work on interpretation of copper speciation titrations. The potential role of titration data structure, humic-type substances, differing dissolved Fe concentrations, and seasonality are also discussed as possible drivers of the one vs. two ligand class determinations between the two profiles, leading to recommendations for future studies of Fe-binding ligand cycling in the oceans. Article in Journal/Newspaper North Atlantic NIOZ Repository (Royal Netherlands Institute for Sea Research) Frontiers in Marine Science 3 |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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ftnioz |
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English |
description |
The organic complexation of dissolved iron (Fe) was determined in depth profile samples collected from GEOTRACES Crossover Station A, the Bermuda Atlantic Time-series Study (BATS) site, as part of the Dutch and U.S. GEOTRACES North Atlantic programs in June 2010 and November 2011, respectively. The two groups employed distinct competitive ligand exchange-adsorptive cathodic stripping voltammetry (CLE-AdCSV) methods, and resulting ligand concentrations and conditional stability constants from each profile were compared. Excellent agreement was found between the total ligand concentrations determined in June 2010 and the strongest, L1-type, ligand concentrations determined in November 2011. Yet a primary distinction between the datasets was the number of ligand classes observed: A single ligand class was characterized in the June 2010 profile while two ligand classes were observed in the November 2011 profile. To assess the role of differing interpretation approaches in determining final results, analysts exchanged titration data, and accompanying parameters from the profiles for reinterpretation. The reinterpretation exercises highlighted the considerable influence of the sensitivity (S) parameter applied on interpretation results, consistent with recent intercalibration work on interpretation of copper speciation titrations. The potential role of titration data structure, humic-type substances, differing dissolved Fe concentrations, and seasonality are also discussed as possible drivers of the one vs. two ligand class determinations between the two profiles, leading to recommendations for future studies of Fe-binding ligand cycling in the oceans. |
format |
Article in Journal/Newspaper |
author |
Buck, K.N. Gerringa, L.J.A. Rijkenberg, M.J.A. |
spellingShingle |
Buck, K.N. Gerringa, L.J.A. Rijkenberg, M.J.A. An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A |
author_facet |
Buck, K.N. Gerringa, L.J.A. Rijkenberg, M.J.A. |
author_sort |
Buck, K.N. |
title |
An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A |
title_short |
An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A |
title_full |
An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A |
title_fullStr |
An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A |
title_full_unstemmed |
An Intercomparison of Dissolved Iron Speciation at the Bermuda Atlantic Time-series Study (BATS) Site: Results from GEOTRACES Crossover Station A |
title_sort |
intercomparison of dissolved iron speciation at the bermuda atlantic time-series study (bats) site: results from geotraces crossover station a |
publishDate |
2016 |
url |
https://www.vliz.be/imisdocs/publications/37/298037.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
%3Ci%3EFront.+Mar.+Sci.+3%3C%2Fi%3E%3A+262.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3389%2Ffmars.2016.00262%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3389%2Ffmars.2016.00262%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000457358000258 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3389/fmars.2016.00262 https://www.vliz.be/imisdocs/publications/37/298037.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2016.00262 |
container_title |
Frontiers in Marine Science |
container_volume |
3 |
_version_ |
1766133322365272064 |