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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ftdoajarticles:oai:doaj.org/article:d55132cca4124760903800a701c04307 2023-05-15T15:52:50+02:00 Do carbonate karst terrains affect the global carbon cycle? Jonathan B. Martin Amy Brown John Ezell 2013-12-01T00:00:00Z https://doi.org/10.3986/ac.v42i2-3.660 https://doaj.org/article/d55132cca4124760903800a701c04307 EN eng Slovenian Academy of Sciences and Arts https://ojs.zrc-sazu.si/carsologica/article/view/660 https://doaj.org/toc/0583-6050 https://doaj.org/toc/1580-2612 0583-6050 1580-2612 doi:10.3986/ac.v42i2-3.660 https://doaj.org/article/d55132cca4124760903800a701c04307 Acta Carsologica, Vol 42, Iss 2-3 (2013) global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation Petrology QE420-499 Stratigraphy QE640-699 article 2013 ftdoajarticles https://doi.org/10.3986/ac.v42i2-3.660 2023-02-12T01:30:58Z 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 Directory of Open Access Journals: DOAJ Articles Acta Carsologica 42 2-3 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation Petrology QE420-499 Stratigraphy QE640-699 |
spellingShingle |
global carbon cycle carbonate terrains organic carbon fixation remineralization carbonate mineral dissolution carbonate mineral precipitation Petrology QE420-499 Stratigraphy QE640-699 Jonathan B. Martin Amy Brown John Ezell 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 Petrology QE420-499 Stratigraphy QE640-699 |
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 |
Jonathan B. Martin Amy Brown John Ezell |
author_facet |
Jonathan B. Martin Amy Brown John Ezell |
author_sort |
Jonathan B. Martin |
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 |
Slovenian Academy of Sciences and Arts |
publishDate |
2013 |
url |
https://doi.org/10.3986/ac.v42i2-3.660 https://doaj.org/article/d55132cca4124760903800a701c04307 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Acta Carsologica, Vol 42, Iss 2-3 (2013) |
op_relation |
https://ojs.zrc-sazu.si/carsologica/article/view/660 https://doaj.org/toc/0583-6050 https://doaj.org/toc/1580-2612 0583-6050 1580-2612 doi:10.3986/ac.v42i2-3.660 https://doaj.org/article/d55132cca4124760903800a701c04307 |
op_doi |
https://doi.org/10.3986/ac.v42i2-3.660 |
container_title |
Acta Carsologica |
container_volume |
42 |
container_issue |
2-3 |
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1766387946257121280 |