A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean
Due to its importance as a limiting nutrient for phytoplankton growth in large regions of the world's oceans, ocean water column observations of concentration of the trace-metal iron (Fe) have increased markedly over recent decades. Here we compile >13 000 global measurements of dissolved Fe...
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ftdoajarticles:oai:doaj.org/article:ee8cd24f65c3482bba3c3776243dbd3a 2023-05-15T13:48:37+02:00 A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean A. Tagliabue T. Mtshali O. Aumont A. R. Bowie M. B. Klunder A. N. Roychoudhury S. Swart 2012-06-01T00:00:00Z https://doi.org/10.5194/bg-9-2333-2012 https://doaj.org/article/ee8cd24f65c3482bba3c3776243dbd3a EN eng Copernicus Publications http://www.biogeosciences.net/9/2333/2012/bg-9-2333-2012.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-9-2333-2012 1726-4170 1726-4189 https://doaj.org/article/ee8cd24f65c3482bba3c3776243dbd3a Biogeosciences, Vol 9, Iss 6, Pp 2333-2349 (2012) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/bg-9-2333-2012 2022-12-30T21:12:09Z Due to its importance as a limiting nutrient for phytoplankton growth in large regions of the world's oceans, ocean water column observations of concentration of the trace-metal iron (Fe) have increased markedly over recent decades. Here we compile >13 000 global measurements of dissolved Fe (dFe) and make this available to the community. We then conduct a synthesis study focussed on the Southern Ocean, where dFe plays a fundamental role in governing the carbon cycle, using four regions, six basins and five depth intervals as a framework. Our analysis highlights depth-dependent trends in the properties of dFe between different regions and basins. In general, surface dFe is highest in the Atlantic basin and the Antarctic region. While attributing drivers to these patterns is uncertain, inter-basin patterns in surface dFe might be linked to differing degrees of dFe inputs, while variability in biological consumption between regions covaries with the associated surface dFe differences. Opposite to the surface, dFe concentrations at depth are typically higher in the Indian basin and the Subantarctic region. The inter-region trends can be reconciled with similar ligand variability (although only from one cruise), and the inter-basin difference might be explained by differences in hydrothermal inputs suggested by modelling studies (Tagliabue et al., 2010) that await observational confirmation. We find that even in regions where many dFe measurements exist, the processes governing the seasonal evolution of dFe remain enigmatic, suggesting that, aside from broad Subantarctic – Antarctic trends, biological consumption might not be the major driver of dFe variability. This highlights the apparent importance of other processes such as exogenous inputs, physical transport/mixing or dFe recycling processes. Nevertheless, missing measurements during key seasonal transitions make it difficult to better quantify and understand surface water replenishment processes and the seasonal Fe cycle. Finally, we detail the degree of ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Indian Southern Ocean The Antarctic Biogeosciences 9 6 2333 2349 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 A. Tagliabue T. Mtshali O. Aumont A. R. Bowie M. B. Klunder A. N. Roychoudhury S. Swart A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Due to its importance as a limiting nutrient for phytoplankton growth in large regions of the world's oceans, ocean water column observations of concentration of the trace-metal iron (Fe) have increased markedly over recent decades. Here we compile >13 000 global measurements of dissolved Fe (dFe) and make this available to the community. We then conduct a synthesis study focussed on the Southern Ocean, where dFe plays a fundamental role in governing the carbon cycle, using four regions, six basins and five depth intervals as a framework. Our analysis highlights depth-dependent trends in the properties of dFe between different regions and basins. In general, surface dFe is highest in the Atlantic basin and the Antarctic region. While attributing drivers to these patterns is uncertain, inter-basin patterns in surface dFe might be linked to differing degrees of dFe inputs, while variability in biological consumption between regions covaries with the associated surface dFe differences. Opposite to the surface, dFe concentrations at depth are typically higher in the Indian basin and the Subantarctic region. The inter-region trends can be reconciled with similar ligand variability (although only from one cruise), and the inter-basin difference might be explained by differences in hydrothermal inputs suggested by modelling studies (Tagliabue et al., 2010) that await observational confirmation. We find that even in regions where many dFe measurements exist, the processes governing the seasonal evolution of dFe remain enigmatic, suggesting that, aside from broad Subantarctic – Antarctic trends, biological consumption might not be the major driver of dFe variability. This highlights the apparent importance of other processes such as exogenous inputs, physical transport/mixing or dFe recycling processes. Nevertheless, missing measurements during key seasonal transitions make it difficult to better quantify and understand surface water replenishment processes and the seasonal Fe cycle. Finally, we detail the degree of ... |
format |
Article in Journal/Newspaper |
author |
A. Tagliabue T. Mtshali O. Aumont A. R. Bowie M. B. Klunder A. N. Roychoudhury S. Swart |
author_facet |
A. Tagliabue T. Mtshali O. Aumont A. R. Bowie M. B. Klunder A. N. Roychoudhury S. Swart |
author_sort |
A. Tagliabue |
title |
A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean |
title_short |
A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean |
title_full |
A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean |
title_fullStr |
A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean |
title_full_unstemmed |
A global compilation of dissolved iron measurements: focus on distributions and processes in the Southern Ocean |
title_sort |
global compilation of dissolved iron measurements: focus on distributions and processes in the southern ocean |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/bg-9-2333-2012 https://doaj.org/article/ee8cd24f65c3482bba3c3776243dbd3a |
geographic |
Antarctic Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Biogeosciences, Vol 9, Iss 6, Pp 2333-2349 (2012) |
op_relation |
http://www.biogeosciences.net/9/2333/2012/bg-9-2333-2012.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-9-2333-2012 1726-4170 1726-4189 https://doaj.org/article/ee8cd24f65c3482bba3c3776243dbd3a |
op_doi |
https://doi.org/10.5194/bg-9-2333-2012 |
container_title |
Biogeosciences |
container_volume |
9 |
container_issue |
6 |
container_start_page |
2333 |
op_container_end_page |
2349 |
_version_ |
1766249519918350336 |