Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution
The marine aragonite cycle has been included in the global biogeochemical model PISCES to study the role of aragonite in shallow water CaCO3 dissolution. Aragonite production is parameterized as a function of mesozooplankton biomass and aragonite saturation state of ambient waters. Observation-based...
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ftunivbern:oai:boris.unibe.ch:37312 2023-08-20T04:07:56+02:00 Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution Gangstø, Reidun Gehlen, M. Schneider, B. Bopp, L. Aumont, O. Joos, Fortunat 2008 application/pdf https://boris.unibe.ch/37312/1/bg-5-1057-2008.pdf https://boris.unibe.ch/37312/ eng eng Copernicus Publications https://boris.unibe.ch/37312/ info:eu-repo/semantics/openAccess Gangstø, Reidun; Gehlen, M.; Schneider, B.; Bopp, L.; Aumont, O.; Joos, Fortunat (2008). Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution. Biogeosciences, 5(4), pp. 1057-1072. Göttingen: Copernicus Publications 10.5194/bg-5-1057-2008 <http://dx.doi.org/10.5194/bg-5-1057-2008> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2008 ftunivbern https://doi.org/10.5194/bg-5-1057-2008 2023-07-31T20:59:30Z The marine aragonite cycle has been included in the global biogeochemical model PISCES to study the role of aragonite in shallow water CaCO3 dissolution. Aragonite production is parameterized as a function of mesozooplankton biomass and aragonite saturation state of ambient waters. Observation-based estimates of marine carbonate production and dissolution are well reproduced by the model and about 60% of the combined CaCO3 water column dissolution from aragonite and calcite is simulated above 2000 m. In contrast, a calcite-only version yields a much smaller fraction. This suggests that the aragonite cycle should be included in models for a realistic representation of CaCO3 dissolution and alkalinity. For the SRES A2 CO2 scenario, production rates of aragonite are projected to notably decrease after 2050. By the end of this century, global aragonite production is reduced by 29% and total CaCO3 production by 19% relative to pre-industrial. Geographically, the effect from increasing atmospheric CO2, and the subsequent reduction in saturation state, is largest in the subpolar and polar areas where the modeled aragonite production is projected to decrease by 65% until 2100. Article in Journal/Newspaper Mesozooplankton BORIS (Bern Open Repository and Information System, University of Bern) Biogeosciences 5 4 1057 1072 |
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BORIS (Bern Open Repository and Information System, University of Bern) |
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English |
topic |
530 Physics |
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530 Physics Gangstø, Reidun Gehlen, M. Schneider, B. Bopp, L. Aumont, O. Joos, Fortunat Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution |
topic_facet |
530 Physics |
description |
The marine aragonite cycle has been included in the global biogeochemical model PISCES to study the role of aragonite in shallow water CaCO3 dissolution. Aragonite production is parameterized as a function of mesozooplankton biomass and aragonite saturation state of ambient waters. Observation-based estimates of marine carbonate production and dissolution are well reproduced by the model and about 60% of the combined CaCO3 water column dissolution from aragonite and calcite is simulated above 2000 m. In contrast, a calcite-only version yields a much smaller fraction. This suggests that the aragonite cycle should be included in models for a realistic representation of CaCO3 dissolution and alkalinity. For the SRES A2 CO2 scenario, production rates of aragonite are projected to notably decrease after 2050. By the end of this century, global aragonite production is reduced by 29% and total CaCO3 production by 19% relative to pre-industrial. Geographically, the effect from increasing atmospheric CO2, and the subsequent reduction in saturation state, is largest in the subpolar and polar areas where the modeled aragonite production is projected to decrease by 65% until 2100. |
format |
Article in Journal/Newspaper |
author |
Gangstø, Reidun Gehlen, M. Schneider, B. Bopp, L. Aumont, O. Joos, Fortunat |
author_facet |
Gangstø, Reidun Gehlen, M. Schneider, B. Bopp, L. Aumont, O. Joos, Fortunat |
author_sort |
Gangstø, Reidun |
title |
Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution |
title_short |
Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution |
title_full |
Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution |
title_fullStr |
Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution |
title_full_unstemmed |
Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution |
title_sort |
modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water caco3 dissolution |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://boris.unibe.ch/37312/1/bg-5-1057-2008.pdf https://boris.unibe.ch/37312/ |
genre |
Mesozooplankton |
genre_facet |
Mesozooplankton |
op_source |
Gangstø, Reidun; Gehlen, M.; Schneider, B.; Bopp, L.; Aumont, O.; Joos, Fortunat (2008). Modeling the marine aragonite cycle: changes under rising carbon dioxide and its role in shallow water CaCO3 dissolution. Biogeosciences, 5(4), pp. 1057-1072. Göttingen: Copernicus Publications 10.5194/bg-5-1057-2008 <http://dx.doi.org/10.5194/bg-5-1057-2008> |
op_relation |
https://boris.unibe.ch/37312/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-5-1057-2008 |
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Biogeosciences |
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5 |
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4 |
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1057 |
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1072 |
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