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Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica
The removal mechanism of refractory deep-ocean dissolved organic carbon (deep-DOC) is poorly understood. The Amundsen Sea Polynya (ASP) serves as a natural test basin for assessing the fate of deep-DOC when it is supplied with a large amount of fresh-DOC and exposed to strong solar radiation during...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6985272/ https://www.ncbi.nlm.nih.gov/pubmed/31988336 http://dx.doi.org/10.1038/s41598-020-57870-6 |
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author | Fang, Ling Lee, SangHoon Lee, Shin-Ah Hahm, Doshik Kim, Guebuem Druffel, Ellen R. M. Hwang, Jeomshik |
author_facet | Fang, Ling Lee, SangHoon Lee, Shin-Ah Hahm, Doshik Kim, Guebuem Druffel, Ellen R. M. Hwang, Jeomshik |
author_sort | Fang, Ling |
collection | PubMed |
description | The removal mechanism of refractory deep-ocean dissolved organic carbon (deep-DOC) is poorly understood. The Amundsen Sea Polynya (ASP) serves as a natural test basin for assessing the fate of deep-DOC when it is supplied with a large amount of fresh-DOC and exposed to strong solar radiation during the polynya opening in austral summer. We measured the radiocarbon content of DOC in the water column on the western Amundsen shelf. The radiocarbon content of DOC in the surface water of the ASP reflected higher primary production than in the region covered by sea ice. The radiocarbon measurements of DOC, taken two years apart in the ASP, were different, suggesting rapid cycling of DOC. The increase in DOC concentration was less than expected from the observed increase in radiocarbon content from those at the greatest depths. Based on a radiocarbon mass balance, we show that deep-DOC is consumed along with fresh-DOC in the ASP. Our observations imply that water circulation through the surface layer, where fresh-DOC is produced, may play an important role in global DOC cycling. |
format | Online Article Text |
id | pubmed-6985272 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-69852722020-01-31 Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica Fang, Ling Lee, SangHoon Lee, Shin-Ah Hahm, Doshik Kim, Guebuem Druffel, Ellen R. M. Hwang, Jeomshik Sci Rep Article The removal mechanism of refractory deep-ocean dissolved organic carbon (deep-DOC) is poorly understood. The Amundsen Sea Polynya (ASP) serves as a natural test basin for assessing the fate of deep-DOC when it is supplied with a large amount of fresh-DOC and exposed to strong solar radiation during the polynya opening in austral summer. We measured the radiocarbon content of DOC in the water column on the western Amundsen shelf. The radiocarbon content of DOC in the surface water of the ASP reflected higher primary production than in the region covered by sea ice. The radiocarbon measurements of DOC, taken two years apart in the ASP, were different, suggesting rapid cycling of DOC. The increase in DOC concentration was less than expected from the observed increase in radiocarbon content from those at the greatest depths. Based on a radiocarbon mass balance, we show that deep-DOC is consumed along with fresh-DOC in the ASP. Our observations imply that water circulation through the surface layer, where fresh-DOC is produced, may play an important role in global DOC cycling. Nature Publishing Group UK 2020-01-27 /pmc/articles/PMC6985272/ /pubmed/31988336 http://dx.doi.org/10.1038/s41598-020-57870-6 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Fang, Ling Lee, SangHoon Lee, Shin-Ah Hahm, Doshik Kim, Guebuem Druffel, Ellen R. M. Hwang, Jeomshik Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica |
title | Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica |
title_full | Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica |
title_fullStr | Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica |
title_full_unstemmed | Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica |
title_short | Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica |
title_sort | removal of refractory dissolved organic carbon in the amundsen sea, antarctica |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6985272/ https://www.ncbi.nlm.nih.gov/pubmed/31988336 http://dx.doi.org/10.1038/s41598-020-57870-6 |
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