Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica
Abstract 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 radiatio...
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2020
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crspringernat:10.1038/s41598-020-57870-6 2023-05-15T13:23:48+02:00 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 2020 http://dx.doi.org/10.1038/s41598-020-57870-6 http://www.nature.com/articles/s41598-020-57870-6.pdf http://www.nature.com/articles/s41598-020-57870-6 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 10, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2020 crspringernat https://doi.org/10.1038/s41598-020-57870-6 2022-01-04T16:10:39Z Abstract 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. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Sea ice Springer Nature (via Crossref) Austral Amundsen Sea Scientific Reports 10 1 |
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Springer Nature (via Crossref) |
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language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary 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 |
topic_facet |
Multidisciplinary |
description |
Abstract 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 |
Article in Journal/Newspaper |
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 |
title |
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_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_sort |
removal of refractory dissolved organic carbon in the amundsen sea, antarctica |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s41598-020-57870-6 http://www.nature.com/articles/s41598-020-57870-6.pdf http://www.nature.com/articles/s41598-020-57870-6 |
geographic |
Austral Amundsen Sea |
geographic_facet |
Austral Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctica Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctica Sea ice |
op_source |
Scientific Reports volume 10, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-57870-6 |
container_title |
Scientific Reports |
container_volume |
10 |
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1 |
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1766375464901804032 |