Detrital Carbonate Minerals in Earth's Element Cycles
We investigate if the commonly neglected riverine detrital carbonate fluxes might reconciliate several chemical mass balances of the global ocean. Particulate inorganic carbon (PIC) concentrations in riverine suspended sediments, that is, carbon contained by these detrital carbonate minerals, were q...
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ftpubmed:oai:pubmedcentral.nih.gov:9285522 2023-05-15T13:50:20+02:00 Detrital Carbonate Minerals in Earth's Element Cycles Müller, Gerrit Börker, Janine Sluijs, Appy Middelburg, Jack J. 2022-05-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285522/ http://www.ncbi.nlm.nih.gov/pubmed/35859702 https://doi.org/10.1029/2021GB007231 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285522/ http://www.ncbi.nlm.nih.gov/pubmed/35859702 http://dx.doi.org/10.1029/2021GB007231 © 2022. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Global Biogeochem Cycles Research Article Text 2022 ftpubmed https://doi.org/10.1029/2021GB007231 2022-07-31T01:40:54Z We investigate if the commonly neglected riverine detrital carbonate fluxes might reconciliate several chemical mass balances of the global ocean. Particulate inorganic carbon (PIC) concentrations in riverine suspended sediments, that is, carbon contained by these detrital carbonate minerals, were quantified at the basin and global scale. Our approach is based on globally representative data sets of riverine suspended sediment composition, catchment properties, and a two‐step regression procedure. The present‐day global riverine PIC flux is estimated at 3.1 ± 0.3 Tmol C/y (13% of total inorganic carbon export and 4% of total carbon export) with a flux‐weighted mean concentration of 0.26 ± 0.03 wt%. The flux prior to damming was 4.1 ± 0.5 Tmol C/y. PIC fluxes are concentrated in limestone‐rich, rather dry and mountainous catchments of large rivers near Arabia, South East Asia, and Europe with 2.2 Tmol C/y (67.6%) discharged between 15°N and 45°N. Greenlandic and Antarctic meltwater discharge and ice‐rafting additionally contribute 0.8 ± 0.3 Tmol C/y. This amount of detrital carbonate minerals annually discharged into the ocean implies a significant contribution of calcium (∼4.75 Tmol Ca/y) and alkalinity fluxes (∼10 Tmol (eq)/y) to marine mass balances and moderate inputs of strontium (∼5 Gmol Sr/y) based on undisturbed riverine and cryospheric inputs and a dolomite/calcite ratio of 0.1. Magnesium fluxes (∼0.25 Tmol Mg/y), mostly hosted by less‐soluble dolomite, are rather negligible. These unaccounted fluxes help in elucidating respective marine mass balances and potentially alter conclusions based on these budgets. Text Antarc* Antarctic greenlandic PubMed Central (PMC) Antarctic Global Biogeochemical Cycles 36 5 |
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Research Article Müller, Gerrit Börker, Janine Sluijs, Appy Middelburg, Jack J. Detrital Carbonate Minerals in Earth's Element Cycles |
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Research Article |
description |
We investigate if the commonly neglected riverine detrital carbonate fluxes might reconciliate several chemical mass balances of the global ocean. Particulate inorganic carbon (PIC) concentrations in riverine suspended sediments, that is, carbon contained by these detrital carbonate minerals, were quantified at the basin and global scale. Our approach is based on globally representative data sets of riverine suspended sediment composition, catchment properties, and a two‐step regression procedure. The present‐day global riverine PIC flux is estimated at 3.1 ± 0.3 Tmol C/y (13% of total inorganic carbon export and 4% of total carbon export) with a flux‐weighted mean concentration of 0.26 ± 0.03 wt%. The flux prior to damming was 4.1 ± 0.5 Tmol C/y. PIC fluxes are concentrated in limestone‐rich, rather dry and mountainous catchments of large rivers near Arabia, South East Asia, and Europe with 2.2 Tmol C/y (67.6%) discharged between 15°N and 45°N. Greenlandic and Antarctic meltwater discharge and ice‐rafting additionally contribute 0.8 ± 0.3 Tmol C/y. This amount of detrital carbonate minerals annually discharged into the ocean implies a significant contribution of calcium (∼4.75 Tmol Ca/y) and alkalinity fluxes (∼10 Tmol (eq)/y) to marine mass balances and moderate inputs of strontium (∼5 Gmol Sr/y) based on undisturbed riverine and cryospheric inputs and a dolomite/calcite ratio of 0.1. Magnesium fluxes (∼0.25 Tmol Mg/y), mostly hosted by less‐soluble dolomite, are rather negligible. These unaccounted fluxes help in elucidating respective marine mass balances and potentially alter conclusions based on these budgets. |
format |
Text |
author |
Müller, Gerrit Börker, Janine Sluijs, Appy Middelburg, Jack J. |
author_facet |
Müller, Gerrit Börker, Janine Sluijs, Appy Middelburg, Jack J. |
author_sort |
Müller, Gerrit |
title |
Detrital Carbonate Minerals in Earth's Element Cycles |
title_short |
Detrital Carbonate Minerals in Earth's Element Cycles |
title_full |
Detrital Carbonate Minerals in Earth's Element Cycles |
title_fullStr |
Detrital Carbonate Minerals in Earth's Element Cycles |
title_full_unstemmed |
Detrital Carbonate Minerals in Earth's Element Cycles |
title_sort |
detrital carbonate minerals in earth's element cycles |
publisher |
John Wiley and Sons Inc. |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285522/ http://www.ncbi.nlm.nih.gov/pubmed/35859702 https://doi.org/10.1029/2021GB007231 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic greenlandic |
genre_facet |
Antarc* Antarctic greenlandic |
op_source |
Global Biogeochem Cycles |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285522/ http://www.ncbi.nlm.nih.gov/pubmed/35859702 http://dx.doi.org/10.1029/2021GB007231 |
op_rights |
© 2022. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
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CC-BY |
op_doi |
https://doi.org/10.1029/2021GB007231 |
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Global Biogeochemical Cycles |
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36 |
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5 |
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