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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ftdoajarticles:oai:doaj.org/article:0aa038cd637e48c981f7867515ed2d94 2023-05-15T17:34:52+02:00 An intercomparison of dissolved iron speciation at the Bermuda Atlantic Time-series Study (BATS) site: Results from GEOTRACES Crossover Station A Kristen Nicolle Buck Loes J.A. Gerringa Micha J.A. Rijkenberg 2016-12-01T00:00:00Z https://doi.org/10.3389/fmars.2016.00262 https://doaj.org/article/0aa038cd637e48c981f7867515ed2d94 EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/fmars.2016.00262/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2016.00262 https://doaj.org/article/0aa038cd637e48c981f7867515ed2d94 Frontiers in Marine Science, Vol 3 (2016) Seawater Voltammetry chemical speciation Method intercomparison Iron-binding ligands Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2016 ftdoajarticles https://doi.org/10.3389/fmars.2016.00262 2022-12-31T02:24:16Z 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 versus 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 Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Seawater Voltammetry chemical speciation Method intercomparison Iron-binding ligands Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Seawater Voltammetry chemical speciation Method intercomparison Iron-binding ligands Science Q General. Including nature conservation geographical distribution QH1-199.5 Kristen Nicolle Buck Loes J.A. Gerringa Micha J.A. Rijkenberg An intercomparison of dissolved iron speciation at the Bermuda Atlantic Time-series Study (BATS) site: Results from GEOTRACES Crossover Station A |
topic_facet |
Seawater Voltammetry chemical speciation Method intercomparison Iron-binding ligands Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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 versus 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 |
Kristen Nicolle Buck Loes J.A. Gerringa Micha J.A. Rijkenberg |
author_facet |
Kristen Nicolle Buck Loes J.A. Gerringa Micha J.A. Rijkenberg |
author_sort |
Kristen Nicolle Buck |
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 |
publisher |
Frontiers Media S.A. |
publishDate |
2016 |
url |
https://doi.org/10.3389/fmars.2016.00262 https://doaj.org/article/0aa038cd637e48c981f7867515ed2d94 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Marine Science, Vol 3 (2016) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/fmars.2016.00262/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2016.00262 https://doaj.org/article/0aa038cd637e48c981f7867515ed2d94 |
op_doi |
https://doi.org/10.3389/fmars.2016.00262 |
container_title |
Frontiers in Marine Science |
container_volume |
3 |
_version_ |
1766133831075627008 |