Opal and barium records of six sediment cores for the last 400 ka
Records of biogenic opal and barium were measured in sediment cores at the Antarctic continental margin in the area of the Weddell, Lazarev and Cosmonaut seas. These records provide a qualitative and quantitative tool to estimate changes in palaeoproductivity over the last 400 ka. The stratigraphy o...
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1998
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.728665 https://doi.org/10.1594/PANGAEA.728665 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728665 2024-09-15T17:45:20+00:00 Opal and barium records of six sediment cores for the last 400 ka Bonn, Wolfgang J Gingele, Franz Grobe, Hannes Mackensen, Andreas Fütterer, Dieter K MEDIAN LATITUDE: -67.255584 * MEDIAN LONGITUDE: -7.907604 * SOUTH-BOUND LATITUDE: -72.150000 * WEST-BOUND LONGITUDE: -43.335500 * NORTH-BOUND LATITUDE: -62.849500 * EAST-BOUND LONGITUDE: 37.480500 * DATE/TIME START: 1985-12-23T10:38:00 * DATE/TIME END: 1991-02-24T16:50:00 1998 application/zip, 17 datasets https://doi.pangaea.de/10.1594/PANGAEA.728665 https://doi.org/10.1594/PANGAEA.728665 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728665 https://doi.org/10.1594/PANGAEA.728665 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Bonn, Wolfgang J; Gingele, Franz; Grobe, Hannes; Mackensen, Andreas; Fütterer, Dieter K (1998): Palaeoproductivity at the Antarctic continental margin: opal and barium records for the last 400 ka. Palaeogeography, Palaeoclimatology, Palaeoecology, 139(3-4), 195-211, https://doi.org/10.1016/S0031-0182(97)00144-2 ANT-IV/3 ANT-IX/3 ANT-V/4 ANT-VI/3 ANT-VIII/6 Atka Bay AWI_Paleo Camp Norway Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/347 PS10 PS10/816 PS12 PS12/248 PS12/536 PS1375-3 PS1506-1 PS1575-1 PS16 PS16/534 PS1648-1 PS18 PS18/185 PS1821-6 PS2038-2 Silicon Cycling in the World Ocean SINOPS SL South Orkney dataset publication series 1998 ftpangaea https://doi.org/10.1594/PANGAEA.72866510.1016/S0031-0182(97)00144-2 2024-07-24T02:31:20Z Records of biogenic opal and barium were measured in sediment cores at the Antarctic continental margin in the area of the Weddell, Lazarev and Cosmonaut seas. These records provide a qualitative and quantitative tool to estimate changes in palaeoproductivity over the last 400 ka. The stratigraphy of the investigated cores is calibrated to a lithostratigraphy, adjusted to a stable isotope record from the eastern Weddell Sea, which is supported by a Th-dating method. We present evidence that interglacial productivity along the Antarctic continental margin is twice as high compared to subantarctic sites near South Orkney. A glacial/interglacial pattern with high productivity during peak warm stages can be observed back to 400 ka. High interglacial productivity is linked to a reduced sea-ice coverage, which is regulated by the heat flux introduced by North Atlantic Deep Water (NADW) to the Antarctic Ocean. Generally, good correlations between the barium and opal records of the sediment cores indicate that dissolution of opal in the water column and the sediment does not obscure the surface productivity signal. Therefore, in this area biogenic opal in combination with other proxies, can be used for palaeoproductivity estimates. Palaeoproductivity is also assessed quantitatively from the barium record using the approaches of Dymond et al. (Dymond, J., Suess, E., Lyle, M., 1992. Barium in deep-sea sediments: a geochemical proxy for paleoproductivity. Paleoceanography 7, 163-181) and Francois et al. (Francois, R., Honjo, S., Manganini, S.J., Ravizza, G.E., 1995. Biogenic barium fluxes to the deep sea: implications for paleoproductivity reconstructions. Glob. Biochem. Cycles 9(2), 289-303). Palaeoproductivity rates obtained by both methods show a good temporal correspondence. In peak warm stages, higher values are computed with the approach of Dymond et al. (1992). Though some barium may be provided by lateral advection of material, as indicated by Th data near South Orkney, both methods provide values, which are ... Other/Unknown Material Antarc* Antarctic Antarctic Ocean Lazarev Sea NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-43.335500,37.480500,-62.849500,-72.150000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-IV/3 ANT-IX/3 ANT-V/4 ANT-VI/3 ANT-VIII/6 Atka Bay AWI_Paleo Camp Norway Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/347 PS10 PS10/816 PS12 PS12/248 PS12/536 PS1375-3 PS1506-1 PS1575-1 PS16 PS16/534 PS1648-1 PS18 PS18/185 PS1821-6 PS2038-2 Silicon Cycling in the World Ocean SINOPS SL South Orkney |
spellingShingle |
ANT-IV/3 ANT-IX/3 ANT-V/4 ANT-VI/3 ANT-VIII/6 Atka Bay AWI_Paleo Camp Norway Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/347 PS10 PS10/816 PS12 PS12/248 PS12/536 PS1375-3 PS1506-1 PS1575-1 PS16 PS16/534 PS1648-1 PS18 PS18/185 PS1821-6 PS2038-2 Silicon Cycling in the World Ocean SINOPS SL South Orkney Bonn, Wolfgang J Gingele, Franz Grobe, Hannes Mackensen, Andreas Fütterer, Dieter K Opal and barium records of six sediment cores for the last 400 ka |
topic_facet |
ANT-IV/3 ANT-IX/3 ANT-V/4 ANT-VI/3 ANT-VIII/6 Atka Bay AWI_Paleo Camp Norway Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/347 PS10 PS10/816 PS12 PS12/248 PS12/536 PS1375-3 PS1506-1 PS1575-1 PS16 PS16/534 PS1648-1 PS18 PS18/185 PS1821-6 PS2038-2 Silicon Cycling in the World Ocean SINOPS SL South Orkney |
description |
Records of biogenic opal and barium were measured in sediment cores at the Antarctic continental margin in the area of the Weddell, Lazarev and Cosmonaut seas. These records provide a qualitative and quantitative tool to estimate changes in palaeoproductivity over the last 400 ka. The stratigraphy of the investigated cores is calibrated to a lithostratigraphy, adjusted to a stable isotope record from the eastern Weddell Sea, which is supported by a Th-dating method. We present evidence that interglacial productivity along the Antarctic continental margin is twice as high compared to subantarctic sites near South Orkney. A glacial/interglacial pattern with high productivity during peak warm stages can be observed back to 400 ka. High interglacial productivity is linked to a reduced sea-ice coverage, which is regulated by the heat flux introduced by North Atlantic Deep Water (NADW) to the Antarctic Ocean. Generally, good correlations between the barium and opal records of the sediment cores indicate that dissolution of opal in the water column and the sediment does not obscure the surface productivity signal. Therefore, in this area biogenic opal in combination with other proxies, can be used for palaeoproductivity estimates. Palaeoproductivity is also assessed quantitatively from the barium record using the approaches of Dymond et al. (Dymond, J., Suess, E., Lyle, M., 1992. Barium in deep-sea sediments: a geochemical proxy for paleoproductivity. Paleoceanography 7, 163-181) and Francois et al. (Francois, R., Honjo, S., Manganini, S.J., Ravizza, G.E., 1995. Biogenic barium fluxes to the deep sea: implications for paleoproductivity reconstructions. Glob. Biochem. Cycles 9(2), 289-303). Palaeoproductivity rates obtained by both methods show a good temporal correspondence. In peak warm stages, higher values are computed with the approach of Dymond et al. (1992). Though some barium may be provided by lateral advection of material, as indicated by Th data near South Orkney, both methods provide values, which are ... |
format |
Other/Unknown Material |
author |
Bonn, Wolfgang J Gingele, Franz Grobe, Hannes Mackensen, Andreas Fütterer, Dieter K |
author_facet |
Bonn, Wolfgang J Gingele, Franz Grobe, Hannes Mackensen, Andreas Fütterer, Dieter K |
author_sort |
Bonn, Wolfgang J |
title |
Opal and barium records of six sediment cores for the last 400 ka |
title_short |
Opal and barium records of six sediment cores for the last 400 ka |
title_full |
Opal and barium records of six sediment cores for the last 400 ka |
title_fullStr |
Opal and barium records of six sediment cores for the last 400 ka |
title_full_unstemmed |
Opal and barium records of six sediment cores for the last 400 ka |
title_sort |
opal and barium records of six sediment cores for the last 400 ka |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728665 https://doi.org/10.1594/PANGAEA.728665 |
op_coverage |
MEDIAN LATITUDE: -67.255584 * MEDIAN LONGITUDE: -7.907604 * SOUTH-BOUND LATITUDE: -72.150000 * WEST-BOUND LONGITUDE: -43.335500 * NORTH-BOUND LATITUDE: -62.849500 * EAST-BOUND LONGITUDE: 37.480500 * DATE/TIME START: 1985-12-23T10:38:00 * DATE/TIME END: 1991-02-24T16:50:00 |
long_lat |
ENVELOPE(-43.335500,37.480500,-62.849500,-72.150000) |
genre |
Antarc* Antarctic Antarctic Ocean Lazarev Sea NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Ocean Lazarev Sea NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Weddell Sea |
op_source |
Supplement to: Bonn, Wolfgang J; Gingele, Franz; Grobe, Hannes; Mackensen, Andreas; Fütterer, Dieter K (1998): Palaeoproductivity at the Antarctic continental margin: opal and barium records for the last 400 ka. Palaeogeography, Palaeoclimatology, Palaeoecology, 139(3-4), 195-211, https://doi.org/10.1016/S0031-0182(97)00144-2 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728665 https://doi.org/10.1594/PANGAEA.728665 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.72866510.1016/S0031-0182(97)00144-2 |
_version_ |
1810493111771594752 |