Distribution and mineralogy of carbonate sediments on Antarctic shelves
We analyzed 214 new core-top samples for their CaCO3 content from shelves all around Antarctica in order to understand their distribution and contribution to the marine carbon cycle. The distribution of sedimentary CaCO3 on the Antarctic shelves is connected to environmental parameters where we cons...
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ftoceanrep:oai:oceanrep.geomar.de:22285 2023-05-15T13:48:43+02:00 Distribution and mineralogy of carbonate sediments on Antarctic shelves Hauck, Judith Gerdes, Dieter Hillenbrand, Claus-Dieter Hoppema, Mario Kuhn, Gerhard Nehrke, Gernot Völker, Christoph Wolf-Gladrow, Dieter A. 2012 text https://oceanrep.geomar.de/id/eprint/22285/ https://oceanrep.geomar.de/id/eprint/22285/1/1-s2.0-S0924796311002065-main.pdf https://doi.org/10.1016/j.jmarsys.2011.09.005 en eng Elsevier https://oceanrep.geomar.de/id/eprint/22285/1/1-s2.0-S0924796311002065-main.pdf Hauck, J., Gerdes, D., Hillenbrand, C. D., Hoppema, M., Kuhn, G., Nehrke, G., Völker, C. and Wolf-Gladrow, D. A. (2012) Distribution and mineralogy of carbonate sediments on Antarctic shelves. Journal of Marine Systems, 90 (1). pp. 77-87. DOI 10.1016/j.jmarsys.2011.09.005 <https://doi.org/10.1016/j.jmarsys.2011.09.005>. doi:10.1016/j.jmarsys.2011.09.005 cc_by Article PeerReviewed 2012 ftoceanrep https://doi.org/10.1016/j.jmarsys.2011.09.005 2023-04-07T15:10:40Z We analyzed 214 new core-top samples for their CaCO3 content from shelves all around Antarctica in order to understand their distribution and contribution to the marine carbon cycle. The distribution of sedimentary CaCO3 on the Antarctic shelves is connected to environmental parameters where we considered water depth, width of the shelf, sea-ice coverage and primary production. While CaCO3 contents of surface sediments are usually low, high (> 15%) CaCO3 contents occur at shallow water depths (150–200 m) on the narrow shelves of the eastern Weddell Sea and at a depth range of 600–900 m on the broader and deeper shelves of the Amundsen, Bellingshausen and western Weddell Seas. Regions with high primary production, such as the Ross Sea and the western Antarctic Peninsula region, have generally low CaCO3 contents in the surface sediments. The predominant mineral phase of CaCO3 on the Antarctic shelves is low-magnesium calcite. With respect to ocean acidification, our findings suggest that dissolution of carbonates in Antarctic shelf sediments may be an important negative feedback only after the onset of calcite undersaturation on the Antarctic shelves. Macrozoobenthic CaCO3 standing stocks do not increase the CaCO3 budget significantly as they are two orders of magnitude lower than the budget of the sediments. This first circumpolar compilation of Antarctic shelf carbonate data does not claim to be complete. Future studies are encouraged and needed to fill data gaps especially in the under-sampled southwest Pacific and Indian Ocean sectors of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ocean acidification Ross Sea Sea ice Southern Ocean Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Antarctic Peninsula Indian Pacific Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea Journal of Marine Systems 90 1 77 87 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
We analyzed 214 new core-top samples for their CaCO3 content from shelves all around Antarctica in order to understand their distribution and contribution to the marine carbon cycle. The distribution of sedimentary CaCO3 on the Antarctic shelves is connected to environmental parameters where we considered water depth, width of the shelf, sea-ice coverage and primary production. While CaCO3 contents of surface sediments are usually low, high (> 15%) CaCO3 contents occur at shallow water depths (150–200 m) on the narrow shelves of the eastern Weddell Sea and at a depth range of 600–900 m on the broader and deeper shelves of the Amundsen, Bellingshausen and western Weddell Seas. Regions with high primary production, such as the Ross Sea and the western Antarctic Peninsula region, have generally low CaCO3 contents in the surface sediments. The predominant mineral phase of CaCO3 on the Antarctic shelves is low-magnesium calcite. With respect to ocean acidification, our findings suggest that dissolution of carbonates in Antarctic shelf sediments may be an important negative feedback only after the onset of calcite undersaturation on the Antarctic shelves. Macrozoobenthic CaCO3 standing stocks do not increase the CaCO3 budget significantly as they are two orders of magnitude lower than the budget of the sediments. This first circumpolar compilation of Antarctic shelf carbonate data does not claim to be complete. Future studies are encouraged and needed to fill data gaps especially in the under-sampled southwest Pacific and Indian Ocean sectors of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Hauck, Judith Gerdes, Dieter Hillenbrand, Claus-Dieter Hoppema, Mario Kuhn, Gerhard Nehrke, Gernot Völker, Christoph Wolf-Gladrow, Dieter A. |
spellingShingle |
Hauck, Judith Gerdes, Dieter Hillenbrand, Claus-Dieter Hoppema, Mario Kuhn, Gerhard Nehrke, Gernot Völker, Christoph Wolf-Gladrow, Dieter A. Distribution and mineralogy of carbonate sediments on Antarctic shelves |
author_facet |
Hauck, Judith Gerdes, Dieter Hillenbrand, Claus-Dieter Hoppema, Mario Kuhn, Gerhard Nehrke, Gernot Völker, Christoph Wolf-Gladrow, Dieter A. |
author_sort |
Hauck, Judith |
title |
Distribution and mineralogy of carbonate sediments on Antarctic shelves |
title_short |
Distribution and mineralogy of carbonate sediments on Antarctic shelves |
title_full |
Distribution and mineralogy of carbonate sediments on Antarctic shelves |
title_fullStr |
Distribution and mineralogy of carbonate sediments on Antarctic shelves |
title_full_unstemmed |
Distribution and mineralogy of carbonate sediments on Antarctic shelves |
title_sort |
distribution and mineralogy of carbonate sediments on antarctic shelves |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://oceanrep.geomar.de/id/eprint/22285/ https://oceanrep.geomar.de/id/eprint/22285/1/1-s2.0-S0924796311002065-main.pdf https://doi.org/10.1016/j.jmarsys.2011.09.005 |
geographic |
Antarctic Antarctic Peninsula Indian Pacific Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Indian Pacific Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ocean acidification Ross Sea Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ocean acidification Ross Sea Sea ice Southern Ocean Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/22285/1/1-s2.0-S0924796311002065-main.pdf Hauck, J., Gerdes, D., Hillenbrand, C. D., Hoppema, M., Kuhn, G., Nehrke, G., Völker, C. and Wolf-Gladrow, D. A. (2012) Distribution and mineralogy of carbonate sediments on Antarctic shelves. Journal of Marine Systems, 90 (1). pp. 77-87. DOI 10.1016/j.jmarsys.2011.09.005 <https://doi.org/10.1016/j.jmarsys.2011.09.005>. doi:10.1016/j.jmarsys.2011.09.005 |
op_rights |
cc_by |
op_doi |
https://doi.org/10.1016/j.jmarsys.2011.09.005 |
container_title |
Journal of Marine Systems |
container_volume |
90 |
container_issue |
1 |
container_start_page |
77 |
op_container_end_page |
87 |
_version_ |
1766249605501026304 |