Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance
The Great Calcite Belt (GCB) is a region of elevated surface reflectance in the Southern Ocean (SO) covering similar to 16% of the global ocean and is thought to result from elevated, seasonal concentrations of coccolithophores. Here we describe field observations and experiments from two cruises th...
Published in: | Global Biogeochemical Cycles |
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ftarchimer:oai:archimer.ifremer.fr:49412 2023-05-15T18:24:41+02:00 Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance Balch, William M. Bates, Nicholas R. Lam, Phoebe J. Twining, Benjamin S. Rosengard, Sarah Z. Bowler, Bruce C. Drapeau, Dave T. Garley, Rebecca Lubelczyk, Laura C. Mitchell, Catherine Rauschenberg, Sara 2016-08 application/pdf https://archimer.ifremer.fr/doc/00383/49412/49883.pdf https://doi.org/10.1002/2016GB005414 https://archimer.ifremer.fr/doc/00383/49412/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00383/49412/49883.pdf doi:10.1002/2016GB005414 https://archimer.ifremer.fr/doc/00383/49412/ 2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use CC-BY-NC-ND Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2016-08 , Vol. 30 , N. 8 , P. 1124-1144 coccolithophores trace metals carbonate chemistry Southern Ocean Subantarctic Front Subtropical Front text Publication info:eu-repo/semantics/article 2016 ftarchimer https://doi.org/10.1002/2016GB005414 2021-09-23T20:29:28Z The Great Calcite Belt (GCB) is a region of elevated surface reflectance in the Southern Ocean (SO) covering similar to 16% of the global ocean and is thought to result from elevated, seasonal concentrations of coccolithophores. Here we describe field observations and experiments from two cruises that crossed the GCB in the Atlantic and Indian sectors of the SO. We confirm the presence of coccolithophores, their coccoliths, and associated optical scattering, located primarily in the region of the subtropical, Agulhas, and Subantarctic frontal regions. Coccolithophore-rich regions were typically associated with high-velocity frontal regions with higher seawater partial pressures of CO2 (pCO(2)) than the atmosphere, sufficient to reverse the direction of gas exchange to a CO2 source. There was no calcium carbonate (CaCO3) enhancement of particulate organic carbon (POC) export, but there were increased POC transfer efficiencies in high-flux particulate inorganic carbon regions. Contemporaneous observations are synthesized with results of trace-metal incubation experiments, Th-234-based flux estimates, and remotely sensed observations to generate amandala that summarizes our understanding about the factors that regulate the location of the GCB. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Indian Southern Ocean Global Biogeochemical Cycles 30 8 1124 1144 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
coccolithophores trace metals carbonate chemistry Southern Ocean Subantarctic Front Subtropical Front |
spellingShingle |
coccolithophores trace metals carbonate chemistry Southern Ocean Subantarctic Front Subtropical Front Balch, William M. Bates, Nicholas R. Lam, Phoebe J. Twining, Benjamin S. Rosengard, Sarah Z. Bowler, Bruce C. Drapeau, Dave T. Garley, Rebecca Lubelczyk, Laura C. Mitchell, Catherine Rauschenberg, Sara Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance |
topic_facet |
coccolithophores trace metals carbonate chemistry Southern Ocean Subantarctic Front Subtropical Front |
description |
The Great Calcite Belt (GCB) is a region of elevated surface reflectance in the Southern Ocean (SO) covering similar to 16% of the global ocean and is thought to result from elevated, seasonal concentrations of coccolithophores. Here we describe field observations and experiments from two cruises that crossed the GCB in the Atlantic and Indian sectors of the SO. We confirm the presence of coccolithophores, their coccoliths, and associated optical scattering, located primarily in the region of the subtropical, Agulhas, and Subantarctic frontal regions. Coccolithophore-rich regions were typically associated with high-velocity frontal regions with higher seawater partial pressures of CO2 (pCO(2)) than the atmosphere, sufficient to reverse the direction of gas exchange to a CO2 source. There was no calcium carbonate (CaCO3) enhancement of particulate organic carbon (POC) export, but there were increased POC transfer efficiencies in high-flux particulate inorganic carbon regions. Contemporaneous observations are synthesized with results of trace-metal incubation experiments, Th-234-based flux estimates, and remotely sensed observations to generate amandala that summarizes our understanding about the factors that regulate the location of the GCB. |
format |
Article in Journal/Newspaper |
author |
Balch, William M. Bates, Nicholas R. Lam, Phoebe J. Twining, Benjamin S. Rosengard, Sarah Z. Bowler, Bruce C. Drapeau, Dave T. Garley, Rebecca Lubelczyk, Laura C. Mitchell, Catherine Rauschenberg, Sara |
author_facet |
Balch, William M. Bates, Nicholas R. Lam, Phoebe J. Twining, Benjamin S. Rosengard, Sarah Z. Bowler, Bruce C. Drapeau, Dave T. Garley, Rebecca Lubelczyk, Laura C. Mitchell, Catherine Rauschenberg, Sara |
author_sort |
Balch, William M. |
title |
Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance |
title_short |
Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance |
title_full |
Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance |
title_fullStr |
Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance |
title_full_unstemmed |
Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance |
title_sort |
factors regulating the great calcite belt in the southern ocean and its biogeochemical significance |
publisher |
Amer Geophysical Union |
publishDate |
2016 |
url |
https://archimer.ifremer.fr/doc/00383/49412/49883.pdf https://doi.org/10.1002/2016GB005414 https://archimer.ifremer.fr/doc/00383/49412/ |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2016-08 , Vol. 30 , N. 8 , P. 1124-1144 |
op_relation |
https://archimer.ifremer.fr/doc/00383/49412/49883.pdf doi:10.1002/2016GB005414 https://archimer.ifremer.fr/doc/00383/49412/ |
op_rights |
2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2016GB005414 |
container_title |
Global Biogeochemical Cycles |
container_volume |
30 |
container_issue |
8 |
container_start_page |
1124 |
op_container_end_page |
1144 |
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1766205490084184064 |