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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ftnerc:oai:nora.nerc.ac.uk:16527 2024-02-11T09:56:33+01:00 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 2012 http://nora.nerc.ac.uk/id/eprint/16527/ http://www.sciencedirect.com/science/article/pii/S0924796311002065 unknown Elsevier Hauck, Judith; Gerdes, Dieter; Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Hoppema, Mario; Kuhn, Gerhard; Nehrke, Gernot; Völker, Christoph; Wolf-Gladrow, Dieter. 2012 Distribution and mineralogy of carbonate sediments on Antarctic shelves. Journal of Marine Systems, 90 (1). 77-87. https://doi.org/10.1016/j.jmarsys.2011.09.005 <https://doi.org/10.1016/j.jmarsys.2011.09.005> Chemistry Publication - Article PeerReviewed 2012 ftnerc https://doi.org/10.1016/j.jmarsys.2011.09.005 2024-01-26T00:03:20Z 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 Natural Environment Research Council: NERC Open Research Archive 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 |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Chemistry |
spellingShingle |
Chemistry Hauck, Judith Gerdes, Dieter Hillenbrand, Claus-Dieter Hoppema, Mario Kuhn, Gerhard Nehrke, Gernot Völker, Christoph Wolf-Gladrow, Dieter Distribution and mineralogy of carbonate sediments on Antarctic shelves |
topic_facet |
Chemistry |
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 |
author_facet |
Hauck, Judith Gerdes, Dieter Hillenbrand, Claus-Dieter Hoppema, Mario Kuhn, Gerhard Nehrke, Gernot Völker, Christoph Wolf-Gladrow, Dieter |
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 |
http://nora.nerc.ac.uk/id/eprint/16527/ http://www.sciencedirect.com/science/article/pii/S0924796311002065 |
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 |
Hauck, Judith; Gerdes, Dieter; Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Hoppema, Mario; Kuhn, Gerhard; Nehrke, Gernot; Völker, Christoph; Wolf-Gladrow, Dieter. 2012 Distribution and mineralogy of carbonate sediments on Antarctic shelves. Journal of Marine Systems, 90 (1). 77-87. https://doi.org/10.1016/j.jmarsys.2011.09.005 <https://doi.org/10.1016/j.jmarsys.2011.09.005> |
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_ |
1790604041880862720 |