E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci
Polar oceans are chemically sensitive to anthropogenic acidification due to their relatively low alkalinity and correspondingly weak carbonate buffering capacity. Here, we compare unique CO 2 system observations covering complete annual cycles at an Arctic (Amundsen Gulf) and Antarctic site (Prydz B...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1068.7780 2023-05-15T13:22:56+02:00 E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci E H Shadwick T W Trull H Thomas J A E Gibson The Pennsylvania State University CiteSeerX Archives 2013 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1068.7780 http://www.phys.ocean.dal.ca/%7Ehelmuth/papers/shadwick_et_al_2013.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1068.7780 http://www.phys.ocean.dal.ca/%7Ehelmuth/papers/shadwick_et_al_2013.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.phys.ocean.dal.ca/%7Ehelmuth/papers/shadwick_et_al_2013.pdf text 2013 ftciteseerx 2020-04-26T00:16:26Z Polar oceans are chemically sensitive to anthropogenic acidification due to their relatively low alkalinity and correspondingly weak carbonate buffering capacity. Here, we compare unique CO 2 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 36C), and freshening (3 vs 2), has lower alkalinity (2220 vs 2320 mmol/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 CO 2 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. T he polar oceans are sensitive to increasing global temperature and increasing concentrations of atmospheric carbon dioxide (CO 2 ) (refs. 1, 2), with the impacts of climate change expected to be particularly large in icecovered regions. Compared to other oceans, the Arctic and Southern Oceans remain under-studied at the annual scale, with the majority of observations restricted to the ice-free summer and autumn seasons Text Amundsen Gulf Antarc* Antarctic Arctic Climate change Prydz Bay Sea ice Unknown Antarctic Arctic Prydz Bay The Antarctic |
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English |
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 CO 2 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 36C), and freshening (3 vs 2), has lower alkalinity (2220 vs 2320 mmol/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 CO 2 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. T he polar oceans are sensitive to increasing global temperature and increasing concentrations of atmospheric carbon dioxide (CO 2 ) (refs. 1, 2), with the impacts of climate change expected to be particularly large in icecovered regions. Compared to other oceans, the Arctic and Southern Oceans remain under-studied at the annual scale, with the majority of observations restricted to the ice-free summer and autumn seasons |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E H Shadwick T W Trull H Thomas J A E Gibson |
spellingShingle |
E H Shadwick T W Trull H Thomas J A E Gibson E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci |
author_facet |
E H Shadwick T W Trull H Thomas J A E Gibson |
author_sort |
E H Shadwick |
title |
E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci |
title_short |
E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci |
title_full |
E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci |
title_fullStr |
E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci |
title_full_unstemmed |
E.: Vulnerability of polar oceans to anthropogenic acidification: comparison of Arctic and Antarctic seasonal cycles., Sci |
title_sort |
e.: vulnerability of polar oceans to anthropogenic acidification: comparison of arctic and antarctic seasonal cycles., sci |
publishDate |
2013 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1068.7780 http://www.phys.ocean.dal.ca/%7Ehelmuth/papers/shadwick_et_al_2013.pdf |
geographic |
Antarctic Arctic Prydz Bay The Antarctic |
geographic_facet |
Antarctic Arctic Prydz Bay The Antarctic |
genre |
Amundsen Gulf Antarc* Antarctic Arctic Climate change Prydz Bay Sea ice |
genre_facet |
Amundsen Gulf Antarc* Antarctic Arctic Climate change Prydz Bay Sea ice |
op_source |
http://www.phys.ocean.dal.ca/%7Ehelmuth/papers/shadwick_et_al_2013.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1068.7780 http://www.phys.ocean.dal.ca/%7Ehelmuth/papers/shadwick_et_al_2013.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766367970270904320 |