Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles
Polar oceans are chemically sensitive to anthropogenic acidification due to their relatively low alkalinity and correspondingly weak carbonate buffering capacity. Here, we compare unique CO2 system observations covering complete annual cycles at an Arctic (Amundsen Gulf) and Antarctic site (Prydz Ba...
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ftpubmed:oai:pubmedcentral.nih.gov:3730166 2023-05-15T13:22:55+02:00 Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles Shadwick, E. H. Trull, T. W. Thomas, H. Gibson, J. A. E. 2013-08-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3730166 http://www.ncbi.nlm.nih.gov/pubmed/23903871 https://doi.org/10.1038/srep02339 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3730166 http://www.ncbi.nlm.nih.gov/pubmed/23903871 http://dx.doi.org/10.1038/srep02339 Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/3.0/ This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ CC-BY Article Text 2013 ftpubmed https://doi.org/10.1038/srep02339 2013-09-05T03:18:04Z Polar oceans are chemically sensitive to anthropogenic acidification due to their relatively low alkalinity and correspondingly weak carbonate buffering capacity. Here, we compare unique CO2 system observations covering complete annual cycles at an Arctic (Amundsen Gulf) and Antarctic site (Prydz Bay). The Arctic site experiences greater seasonal warming (10 vs 3°C), and freshening (3 vs 2), has lower alkalinity (2220 vs 2320 μmol/kg), and lower summer pH (8.15 vs 8.5), than the Antarctic site. Despite a larger uptake of inorganic carbon by summer photosynthesis, the Arctic carbon system exhibits smaller seasonal changes than the more alkaline Antarctic system. In addition, the excess surface nutrients in the Antarctic may allow mitigation of acidification, via CO2 removal by enhanced summer production driven by iron inputs from glacial and sea-ice melting. These differences suggest that the Arctic system is more vulnerable to anthropogenic change due to lower alkalinity, enhanced warming, and nutrient limitation. Text Amundsen Gulf Antarc* Antarctic Arctic Prydz Bay Sea ice PubMed Central (PMC) Antarctic Arctic Prydz Bay The Antarctic Scientific Reports 3 1 |
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Article Shadwick, E. H. Trull, T. W. Thomas, H. Gibson, J. A. E. Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles |
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Article |
description |
Polar oceans are chemically sensitive to anthropogenic acidification due to their relatively low alkalinity and correspondingly weak carbonate buffering capacity. Here, we compare unique CO2 system observations covering complete annual cycles at an Arctic (Amundsen Gulf) and Antarctic site (Prydz Bay). The Arctic site experiences greater seasonal warming (10 vs 3°C), and freshening (3 vs 2), has lower alkalinity (2220 vs 2320 μmol/kg), and lower summer pH (8.15 vs 8.5), than the Antarctic site. Despite a larger uptake of inorganic carbon by summer photosynthesis, the Arctic carbon system exhibits smaller seasonal changes than the more alkaline Antarctic system. In addition, the excess surface nutrients in the Antarctic may allow mitigation of acidification, via CO2 removal by enhanced summer production driven by iron inputs from glacial and sea-ice melting. These differences suggest that the Arctic system is more vulnerable to anthropogenic change due to lower alkalinity, enhanced warming, and nutrient limitation. |
format |
Text |
author |
Shadwick, E. H. Trull, T. W. Thomas, H. Gibson, J. A. E. |
author_facet |
Shadwick, E. H. Trull, T. W. Thomas, H. Gibson, J. A. E. |
author_sort |
Shadwick, E. H. |
title |
Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles |
title_short |
Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles |
title_full |
Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles |
title_fullStr |
Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles |
title_full_unstemmed |
Vulnerability of Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles |
title_sort |
vulnerability of polar oceans to anthropogenic acidification: comparison of arctic and antarctic seasonal cycles |
publisher |
Nature Publishing Group |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3730166 http://www.ncbi.nlm.nih.gov/pubmed/23903871 https://doi.org/10.1038/srep02339 |
geographic |
Antarctic Arctic Prydz Bay The Antarctic |
geographic_facet |
Antarctic Arctic Prydz Bay The Antarctic |
genre |
Amundsen Gulf Antarc* Antarctic Arctic Prydz Bay Sea ice |
genre_facet |
Amundsen Gulf Antarc* Antarctic Arctic Prydz Bay Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3730166 http://www.ncbi.nlm.nih.gov/pubmed/23903871 http://dx.doi.org/10.1038/srep02339 |
op_rights |
Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/3.0/ This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ |
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CC-BY |
op_doi |
https://doi.org/10.1038/srep02339 |
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Scientific Reports |
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3 |
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1766367844763697152 |