Do carbonate karst terrains affect the global carbon cycle?
Carbonate minerals comprise the largest reservoir of carbon in the earth’s lithosphere, but they are generally assumed to have no net impact on the global carbon cycle if rapid dissolution and precipitation reactions represent equal sources and sinks of atmospheric carbon. Observations of both terre...
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ftslacadscienart:oai:ojs.zrc-sazu.si:article/660 2024-09-15T18:01:40+00:00 Do carbonate karst terrains affect the global carbon cycle? Martin, Jonathan B. Brown, Amy Ezell, John 2013-12-10 application/pdf https://ojs.zrc-sazu.si/carsologica/article/view/660/591 https://ojs.zrc-sazu.si/carsologica/article/view/660 eng eng ZRC SAZU, Založba ZRC https://ojs.zrc-sazu.si/carsologica/article/view/660 Acta Carsologica; Vol. 42 No. 2-3 (2013) Acta Carsologica; Letn. 42 Št. 2-3 (2013) 1580-2612 0583-6050 Global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Original papers 2013 ftslacadscienart 2024-08-05T03:05:17Z Carbonate minerals comprise the largest reservoir of carbon in the earth’s lithosphere, but they are generally assumed to have no net impact on the global carbon cycle if rapid dissolution and precipitation reactions represent equal sources and sinks of atmospheric carbon. Observations of both terrestrial and marine carbonate systems indicate that carbonate minerals may simultaneously dissolve and precipitate within different portions of individual hydrologic systems. In all cases reported here, the dissolution and precipitation reactions are related to primary production, which fixes atmospheric CO2 as organic carbon, and the subsequent remineralization in watersheds of the organic carbon to dissolved CO2. Deposition of carbonate minerals in the ocean represents a flux of CO2 to the atmosphere. The dissolution of oceanic carbonate minerals can act either as a sink for atmospheric CO2 if dissolved by carbonic acid, or as a source of CO2 if dissolved through sulfide oxidation at the freshwater-saltwater boundary. Since dissolution and precipitation of carbonate minerals depend on ecological processes, changes in these processes due to shifts in rainfall patterns, earth surface temperatures, and sea level should also alter the potential magnitudes of sources and sinks for atmospheric CO2 from carbonate terrains, providing feedbacks to the global carbon cycle that differ from modern feedbacks.Keywords: Global carbon cycle, carbonate terrains, organic carbon fixation, remineralization, carbonate mineral dissolution, carbonate mineral precipitation.DOI:10.3986/ac.v42i2-3.660 Article in Journal/Newspaper Carbonic acid ZRC SAZU Publishing (Znanstvenoraziskovalni center - Slovenske akademije znanosti in umetnosti) Acta Carsologica 42 2-3 |
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Open Polar |
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ZRC SAZU Publishing (Znanstvenoraziskovalni center - Slovenske akademije znanosti in umetnosti) |
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ftslacadscienart |
language |
English |
topic |
Global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation |
spellingShingle |
Global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation Martin, Jonathan B. Brown, Amy Ezell, John Do carbonate karst terrains affect the global carbon cycle? |
topic_facet |
Global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation |
description |
Carbonate minerals comprise the largest reservoir of carbon in the earth’s lithosphere, but they are generally assumed to have no net impact on the global carbon cycle if rapid dissolution and precipitation reactions represent equal sources and sinks of atmospheric carbon. Observations of both terrestrial and marine carbonate systems indicate that carbonate minerals may simultaneously dissolve and precipitate within different portions of individual hydrologic systems. In all cases reported here, the dissolution and precipitation reactions are related to primary production, which fixes atmospheric CO2 as organic carbon, and the subsequent remineralization in watersheds of the organic carbon to dissolved CO2. Deposition of carbonate minerals in the ocean represents a flux of CO2 to the atmosphere. The dissolution of oceanic carbonate minerals can act either as a sink for atmospheric CO2 if dissolved by carbonic acid, or as a source of CO2 if dissolved through sulfide oxidation at the freshwater-saltwater boundary. Since dissolution and precipitation of carbonate minerals depend on ecological processes, changes in these processes due to shifts in rainfall patterns, earth surface temperatures, and sea level should also alter the potential magnitudes of sources and sinks for atmospheric CO2 from carbonate terrains, providing feedbacks to the global carbon cycle that differ from modern feedbacks.Keywords: Global carbon cycle, carbonate terrains, organic carbon fixation, remineralization, carbonate mineral dissolution, carbonate mineral precipitation.DOI:10.3986/ac.v42i2-3.660 |
format |
Article in Journal/Newspaper |
author |
Martin, Jonathan B. Brown, Amy Ezell, John |
author_facet |
Martin, Jonathan B. Brown, Amy Ezell, John |
author_sort |
Martin, Jonathan B. |
title |
Do carbonate karst terrains affect the global carbon cycle? |
title_short |
Do carbonate karst terrains affect the global carbon cycle? |
title_full |
Do carbonate karst terrains affect the global carbon cycle? |
title_fullStr |
Do carbonate karst terrains affect the global carbon cycle? |
title_full_unstemmed |
Do carbonate karst terrains affect the global carbon cycle? |
title_sort |
do carbonate karst terrains affect the global carbon cycle? |
publisher |
ZRC SAZU, Založba ZRC |
publishDate |
2013 |
url |
https://ojs.zrc-sazu.si/carsologica/article/view/660/591 https://ojs.zrc-sazu.si/carsologica/article/view/660 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Acta Carsologica; Vol. 42 No. 2-3 (2013) Acta Carsologica; Letn. 42 Št. 2-3 (2013) 1580-2612 0583-6050 |
op_relation |
https://ojs.zrc-sazu.si/carsologica/article/view/660 |
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Acta Carsologica |
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42 |
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2-3 |
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1810438767068053504 |