Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188
We studied two deep-sea cores from the Scotia Sea to reconstruct past atmospheric circulation in the southern hemisphere and to resolve a long-standing debate on the interpretation of magnetic susceptibility (MS) records in Southern Ocean (SO) sediment. High-sedimentation sites MD07-3134 (0.2 - 1.2...
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ftdatacite:10.1594/pangaea.771904 2023-05-15T14:04:23+02:00 Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 Weber, Michael E Kuhn, Gerhard Sprenk, Daniela Rolf, Christian Ohlwein, Christian Ricken, Werner 2012 application/zip https://dx.doi.org/10.1594/pangaea.771904 https://doi.pangaea.de/10.1594/PANGAEA.771904 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.quascirev.2012.01.016 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Calypso Corer II MD160 Marion Dufresne 1995 International Marine Global Change Study IMAGES Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo article Supplementary Collection of Datasets Collection 2012 ftdatacite https://doi.org/10.1594/pangaea.771904 https://doi.org/10.1016/j.quascirev.2012.01.016 2022-02-09T12:04:35Z We studied two deep-sea cores from the Scotia Sea to reconstruct past atmospheric circulation in the southern hemisphere and to resolve a long-standing debate on the interpretation of magnetic susceptibility (MS) records in Southern Ocean (SO) sediment. High-sedimentation sites MD07-3134 (0.2 - 1.2 m/kyr) and MD07-3133 (0.3 - 2 m/kyr) cover the last 92.5 kyr and 36 kyr, respectively. Both exhibit a one-to-one coupling of the MS and Ca2+ signal to the non-sea salt (nss) Ca2+ signal of the EDML ice core, clearly identifying atmospheric circulation as means of distribution. Comparison of additional proxies also excludes major influence by volcanic sources, sea-ice, icebergs, or oceanic current transport. The close resemblance of the dust proxies over the last glacial cycle, in turn, allows for the establishment of an age model of unprecedented resolution and precision for SO deep-sea sediment because atmospheric transport involves no major leads or lags. This is of particular importance because MS is routinely measured on deep-sea cores in the SO but the sediments usually lack biogenic carbonate and therefore had only limited stratigraphic control so far.Southern South America (SSA) is the likely source of eolian material because Site MD07-3133, located closer to the continent, has slightly higher MS values than Site MD07-3134, and also the MS record of Patagonian Site SALSA shows comparable variability. Patagonia was the dust source for both the Scotia Sea and East Antarctica. Dust fluxes were several times higher during glacial times, when atmospheric circulation was either stronger or shifted in latitude, sea level was lowered, shelf surfaces were exposed, and environmental conditions in SSA were dominated by glaciers and extended outwash plains. Hence, MS records of SO deep-sea sediment are reliable tracers of atmospheric circulation, allowing for chronologically-constrained reconstructions of the circum Antarctic paleoclimate history. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Iceberg* Scotia Sea Sea ice Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean East Antarctica Patagonia Scotia Sea |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Calypso Corer II MD160 Marion Dufresne 1995 International Marine Global Change Study IMAGES Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Calypso Corer II MD160 Marion Dufresne 1995 International Marine Global Change Study IMAGES Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Weber, Michael E Kuhn, Gerhard Sprenk, Daniela Rolf, Christian Ohlwein, Christian Ricken, Werner Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 |
topic_facet |
Calypso Corer II MD160 Marion Dufresne 1995 International Marine Global Change Study IMAGES Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
description |
We studied two deep-sea cores from the Scotia Sea to reconstruct past atmospheric circulation in the southern hemisphere and to resolve a long-standing debate on the interpretation of magnetic susceptibility (MS) records in Southern Ocean (SO) sediment. High-sedimentation sites MD07-3134 (0.2 - 1.2 m/kyr) and MD07-3133 (0.3 - 2 m/kyr) cover the last 92.5 kyr and 36 kyr, respectively. Both exhibit a one-to-one coupling of the MS and Ca2+ signal to the non-sea salt (nss) Ca2+ signal of the EDML ice core, clearly identifying atmospheric circulation as means of distribution. Comparison of additional proxies also excludes major influence by volcanic sources, sea-ice, icebergs, or oceanic current transport. The close resemblance of the dust proxies over the last glacial cycle, in turn, allows for the establishment of an age model of unprecedented resolution and precision for SO deep-sea sediment because atmospheric transport involves no major leads or lags. This is of particular importance because MS is routinely measured on deep-sea cores in the SO but the sediments usually lack biogenic carbonate and therefore had only limited stratigraphic control so far.Southern South America (SSA) is the likely source of eolian material because Site MD07-3133, located closer to the continent, has slightly higher MS values than Site MD07-3134, and also the MS record of Patagonian Site SALSA shows comparable variability. Patagonia was the dust source for both the Scotia Sea and East Antarctica. Dust fluxes were several times higher during glacial times, when atmospheric circulation was either stronger or shifted in latitude, sea level was lowered, shelf surfaces were exposed, and environmental conditions in SSA were dominated by glaciers and extended outwash plains. Hence, MS records of SO deep-sea sediment are reliable tracers of atmospheric circulation, allowing for chronologically-constrained reconstructions of the circum Antarctic paleoclimate history. |
format |
Article in Journal/Newspaper |
author |
Weber, Michael E Kuhn, Gerhard Sprenk, Daniela Rolf, Christian Ohlwein, Christian Ricken, Werner |
author_facet |
Weber, Michael E Kuhn, Gerhard Sprenk, Daniela Rolf, Christian Ohlwein, Christian Ricken, Werner |
author_sort |
Weber, Michael E |
title |
Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 |
title_short |
Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 |
title_full |
Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 |
title_fullStr |
Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 |
title_full_unstemmed |
Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188 |
title_sort |
magnetic susceptibility of deep-sea cores from the scotia sea, supplement to: weber, michael e; kuhn, gerhard; sprenk, daniela; rolf, christian; ohlwein, christian; ricken, werner (2012): dust transport from patagonia to antarctica - a new stratigraphic approach from the scotia sea and its implications for the last glacial cycle. quaternary science reviews, 36, 177-188 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2012 |
url |
https://dx.doi.org/10.1594/pangaea.771904 https://doi.pangaea.de/10.1594/PANGAEA.771904 |
geographic |
Antarctic Southern Ocean East Antarctica Patagonia Scotia Sea |
geographic_facet |
Antarctic Southern Ocean East Antarctica Patagonia Scotia Sea |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Iceberg* Scotia Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Iceberg* Scotia Sea Sea ice Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2012.01.016 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.771904 https://doi.org/10.1016/j.quascirev.2012.01.016 |
_version_ |
1766275446952951808 |