On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean
An important factor for predicting the effect of increased CO2 on future acidification of the ocean is a proper understanding of the interactions controlling production and dissolution of calcium carbonate minerals (CaCO3). The production and dissolution of CaCO3 in the ocean can be assessed over la...
Published in: | Geochimica et Cosmochimica Acta |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/52220/ https://oceanrep.geomar.de/id/eprint/52220/1/Ca%20alk%20anomalies_accepted%20version.pdf https://oceanrep.geomar.de/id/eprint/52220/2/Supporting%20information.docx https://oceanrep.geomar.de/id/eprint/52220/3/Appendix1_SalinityNormalisationErrors.xlsx https://oceanrep.geomar.de/id/eprint/52220/4/Appendix2_CaAlk_Dataset.xlsx https://oceanrep.geomar.de/id/eprint/52220/11/2021_Steiner_GCA_Ca%20alk%20anomalies.pdf https://oceanrep.geomar.de/id/eprint/52220/17/1-s2.0-S0016703721002015-main.pdf https://doi.org/10.1016/j.gca.2021.03.027 |
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ftoceanrep:oai:oceanrep.geomar.de:52220 2024-02-11T10:08:48+01:00 On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean Steiner, Zvi Sarkar, Amit Liu, Xuewu Berelson, William M. Adkins, Jess F. Achterberg, Eric P. Sabu, P. Prakash, Satya Vinaychandran, P.N. Byrne, Robert H. Turchyn, Alexandra V. 2021-06-15 text https://oceanrep.geomar.de/id/eprint/52220/ https://oceanrep.geomar.de/id/eprint/52220/1/Ca%20alk%20anomalies_accepted%20version.pdf https://oceanrep.geomar.de/id/eprint/52220/2/Supporting%20information.docx https://oceanrep.geomar.de/id/eprint/52220/3/Appendix1_SalinityNormalisationErrors.xlsx https://oceanrep.geomar.de/id/eprint/52220/4/Appendix2_CaAlk_Dataset.xlsx https://oceanrep.geomar.de/id/eprint/52220/11/2021_Steiner_GCA_Ca%20alk%20anomalies.pdf https://oceanrep.geomar.de/id/eprint/52220/17/1-s2.0-S0016703721002015-main.pdf https://doi.org/10.1016/j.gca.2021.03.027 en eng Elsevier https://oceanrep.geomar.de/id/eprint/52220/1/Ca%20alk%20anomalies_accepted%20version.pdf https://oceanrep.geomar.de/id/eprint/52220/2/Supporting%20information.docx https://oceanrep.geomar.de/id/eprint/52220/3/Appendix1_SalinityNormalisationErrors.xlsx https://oceanrep.geomar.de/id/eprint/52220/4/Appendix2_CaAlk_Dataset.xlsx https://oceanrep.geomar.de/id/eprint/52220/11/2021_Steiner_GCA_Ca%20alk%20anomalies.pdf https://oceanrep.geomar.de/id/eprint/52220/17/1-s2.0-S0016703721002015-main.pdf Steiner, Z. , Sarkar, A., Liu, X., Berelson, W. M., Adkins, J. F., Achterberg, E. P. , Sabu, P., Prakash, S., Vinaychandran, P. N., Byrne, R. H. and Turchyn, A. V. (2021) On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean. Open Access Geochimica et Cosmochimica Acta, 303 . pp. 1-14. DOI 10.1016/j.gca.2021.03.027 <https://doi.org/10.1016/j.gca.2021.03.027>. doi:10.1016/j.gca.2021.03.027 cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1016/j.gca.2021.03.027 2024-01-15T00:23:13Z An important factor for predicting the effect of increased CO2 on future acidification of the ocean is a proper understanding of the interactions controlling production and dissolution of calcium carbonate minerals (CaCO3). The production and dissolution of CaCO3 in the ocean can be assessed over large spatial scales by measuring seawater calcium concentrations and total alkalinity (AT), yet past studies suggest that there could be large discrepancies between calcium and AT-based balances of the CaCO3 cycle in the North Pacific and Indian Oceans. Here, we analyse water column samples collected along transects in the North Pacific, Southern Ocean, tropical Indian Ocean and Red Sea for their concentrations of calcium, nutrients, and AT. We find that there is an excess calcium over AT anomaly in the top 1000 m of the tropical Indian Ocean water-column. The source of this anomaly is the dissolution of subsurface gypsum deposits in the Red Sea. We find no evidence for calcium-over-AT anomalies in the North Pacific, in contrast to previous studies. Our results show that, in most cases, calcium and AT data agree well and can be used to reconstruct the marine CaCO3 cycle. Article in Journal/Newspaper Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Indian Pacific Southern Ocean Geochimica et Cosmochimica Acta 303 1 14 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
An important factor for predicting the effect of increased CO2 on future acidification of the ocean is a proper understanding of the interactions controlling production and dissolution of calcium carbonate minerals (CaCO3). The production and dissolution of CaCO3 in the ocean can be assessed over large spatial scales by measuring seawater calcium concentrations and total alkalinity (AT), yet past studies suggest that there could be large discrepancies between calcium and AT-based balances of the CaCO3 cycle in the North Pacific and Indian Oceans. Here, we analyse water column samples collected along transects in the North Pacific, Southern Ocean, tropical Indian Ocean and Red Sea for their concentrations of calcium, nutrients, and AT. We find that there is an excess calcium over AT anomaly in the top 1000 m of the tropical Indian Ocean water-column. The source of this anomaly is the dissolution of subsurface gypsum deposits in the Red Sea. We find no evidence for calcium-over-AT anomalies in the North Pacific, in contrast to previous studies. Our results show that, in most cases, calcium and AT data agree well and can be used to reconstruct the marine CaCO3 cycle. |
format |
Article in Journal/Newspaper |
author |
Steiner, Zvi Sarkar, Amit Liu, Xuewu Berelson, William M. Adkins, Jess F. Achterberg, Eric P. Sabu, P. Prakash, Satya Vinaychandran, P.N. Byrne, Robert H. Turchyn, Alexandra V. |
spellingShingle |
Steiner, Zvi Sarkar, Amit Liu, Xuewu Berelson, William M. Adkins, Jess F. Achterberg, Eric P. Sabu, P. Prakash, Satya Vinaychandran, P.N. Byrne, Robert H. Turchyn, Alexandra V. On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean |
author_facet |
Steiner, Zvi Sarkar, Amit Liu, Xuewu Berelson, William M. Adkins, Jess F. Achterberg, Eric P. Sabu, P. Prakash, Satya Vinaychandran, P.N. Byrne, Robert H. Turchyn, Alexandra V. |
author_sort |
Steiner, Zvi |
title |
On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean |
title_short |
On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean |
title_full |
On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean |
title_fullStr |
On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean |
title_full_unstemmed |
On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean |
title_sort |
on calcium-to-alkalinity anomalies in the north pacific, red sea, indian ocean and southern ocean |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/52220/ https://oceanrep.geomar.de/id/eprint/52220/1/Ca%20alk%20anomalies_accepted%20version.pdf https://oceanrep.geomar.de/id/eprint/52220/2/Supporting%20information.docx https://oceanrep.geomar.de/id/eprint/52220/3/Appendix1_SalinityNormalisationErrors.xlsx https://oceanrep.geomar.de/id/eprint/52220/4/Appendix2_CaAlk_Dataset.xlsx https://oceanrep.geomar.de/id/eprint/52220/11/2021_Steiner_GCA_Ca%20alk%20anomalies.pdf https://oceanrep.geomar.de/id/eprint/52220/17/1-s2.0-S0016703721002015-main.pdf https://doi.org/10.1016/j.gca.2021.03.027 |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/52220/1/Ca%20alk%20anomalies_accepted%20version.pdf https://oceanrep.geomar.de/id/eprint/52220/2/Supporting%20information.docx https://oceanrep.geomar.de/id/eprint/52220/3/Appendix1_SalinityNormalisationErrors.xlsx https://oceanrep.geomar.de/id/eprint/52220/4/Appendix2_CaAlk_Dataset.xlsx https://oceanrep.geomar.de/id/eprint/52220/11/2021_Steiner_GCA_Ca%20alk%20anomalies.pdf https://oceanrep.geomar.de/id/eprint/52220/17/1-s2.0-S0016703721002015-main.pdf Steiner, Z. , Sarkar, A., Liu, X., Berelson, W. M., Adkins, J. F., Achterberg, E. P. , Sabu, P., Prakash, S., Vinaychandran, P. N., Byrne, R. H. and Turchyn, A. V. (2021) On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean. Open Access Geochimica et Cosmochimica Acta, 303 . pp. 1-14. DOI 10.1016/j.gca.2021.03.027 <https://doi.org/10.1016/j.gca.2021.03.027>. doi:10.1016/j.gca.2021.03.027 |
op_rights |
cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gca.2021.03.027 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
303 |
container_start_page |
1 |
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14 |
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1790608413000990720 |