Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean
The location and magnitude of oceanic iron sources remain uncertain owing to a scarcity of data, particularly in the Arctic Ocean. The formation of cold, dense water in the subsurface layer of the western Arctic Ocean is a key process in the lateral transport of iron, macronutrients, and other chemi...
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ftpubmed:oai:pubmedcentral.nih.gov:5381382 2023-05-15T14:46:38+02:00 Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean Hioki, Nanako Kuma, Kenshi Morita, Yuichirou Sasayama, Ryouhei Ooki, Atsushi Kondo, Yoshiko Obata, Hajime Nishioka, Jun Yamashita, Youhei Nishino, Shigeto Kikuchi, Takashi Aoyama, Michio 2014-10-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5381382/ http://www.ncbi.nlm.nih.gov/pubmed/25345398 https://doi.org/10.1038/srep06775 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5381382/ http://www.ncbi.nlm.nih.gov/pubmed/25345398 http://dx.doi.org/10.1038/srep06775 Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2014 ftpubmed https://doi.org/10.1038/srep06775 2017-04-16T00:10:21Z The location and magnitude of oceanic iron sources remain uncertain owing to a scarcity of data, particularly in the Arctic Ocean. The formation of cold, dense water in the subsurface layer of the western Arctic Ocean is a key process in the lateral transport of iron, macronutrients, and other chemical constituents. Here, we present iron, humic-like fluorescent dissolved organic matter, and nutrient concentration data in waters above the continental slope and shelf and along two transects across the shelf–basin interface in the western Arctic Ocean. We detected high concentrations in shelf bottom waters and in a plume that extended in the subsurface cold dense water of the halocline layer in slope and basin regions. At σθ = 26.5, dissolved Fe, humic-like fluorescence intensity, and nutrient maxima coincided with N* minima (large negative values of N* indicate significant denitrification within shelf sediments). These results suggest that these constituents are supplied from the shelf sediments and then transported laterally to basin regions. Humic dissolved organic matter probably plays the most important role in the subsurface maxima and lateral transport of dissolved Fe in the halocline layer as natural Fe-binding organic ligand. Text Arctic Arctic Ocean PubMed Central (PMC) Arctic Arctic Ocean Scientific Reports 4 1 |
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Article Hioki, Nanako Kuma, Kenshi Morita, Yuichirou Sasayama, Ryouhei Ooki, Atsushi Kondo, Yoshiko Obata, Hajime Nishioka, Jun Yamashita, Youhei Nishino, Shigeto Kikuchi, Takashi Aoyama, Michio Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean |
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Article |
description |
The location and magnitude of oceanic iron sources remain uncertain owing to a scarcity of data, particularly in the Arctic Ocean. The formation of cold, dense water in the subsurface layer of the western Arctic Ocean is a key process in the lateral transport of iron, macronutrients, and other chemical constituents. Here, we present iron, humic-like fluorescent dissolved organic matter, and nutrient concentration data in waters above the continental slope and shelf and along two transects across the shelf–basin interface in the western Arctic Ocean. We detected high concentrations in shelf bottom waters and in a plume that extended in the subsurface cold dense water of the halocline layer in slope and basin regions. At σθ = 26.5, dissolved Fe, humic-like fluorescence intensity, and nutrient maxima coincided with N* minima (large negative values of N* indicate significant denitrification within shelf sediments). These results suggest that these constituents are supplied from the shelf sediments and then transported laterally to basin regions. Humic dissolved organic matter probably plays the most important role in the subsurface maxima and lateral transport of dissolved Fe in the halocline layer as natural Fe-binding organic ligand. |
format |
Text |
author |
Hioki, Nanako Kuma, Kenshi Morita, Yuichirou Sasayama, Ryouhei Ooki, Atsushi Kondo, Yoshiko Obata, Hajime Nishioka, Jun Yamashita, Youhei Nishino, Shigeto Kikuchi, Takashi Aoyama, Michio |
author_facet |
Hioki, Nanako Kuma, Kenshi Morita, Yuichirou Sasayama, Ryouhei Ooki, Atsushi Kondo, Yoshiko Obata, Hajime Nishioka, Jun Yamashita, Youhei Nishino, Shigeto Kikuchi, Takashi Aoyama, Michio |
author_sort |
Hioki, Nanako |
title |
Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean |
title_short |
Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean |
title_full |
Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean |
title_fullStr |
Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean |
title_full_unstemmed |
Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean |
title_sort |
laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the arctic ocean |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5381382/ http://www.ncbi.nlm.nih.gov/pubmed/25345398 https://doi.org/10.1038/srep06775 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5381382/ http://www.ncbi.nlm.nih.gov/pubmed/25345398 http://dx.doi.org/10.1038/srep06775 |
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Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/srep06775 |
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Scientific Reports |
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4 |
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1 |
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1766317846964469760 |