Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers
In this study, we present a new multiproxy data set of terrigenous input, marine productivity and sea surface temperature (SST) from 52 surface sediment samples collected along E-W transects in the Pacific sector of the Southern Ocean. Allochtonous terrigenous input was characterized by the distribu...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.860667 2023-05-15T13:44:47+02:00 Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers Jaeschke, Andrea Wengler, Marc Hefter, Jens Ronge, Thomas A Geibert, Walter Mollenhauer, Gesine Gersonde, Rainer Lamy, Frank MEDIAN LATITUDE: -47.511930 * MEDIAN LONGITUDE: -136.843778 * SOUTH-BOUND LATITUDE: -68.730330 * WEST-BOUND LONGITUDE: 174.101800 * NORTH-BOUND LATITUDE: -35.994170 * EAST-BOUND LONGITUDE: -79.916500 * DATE/TIME START: 2009-12-07T20:39:00 * DATE/TIME END: 2011-03-05T02:21:00 2016-05-21 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.860667 https://doi.org/10.1594/PANGAEA.860667 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.860667 https://doi.org/10.1594/PANGAEA.860667 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Jaeschke, Andrea; Wengler, Marc; Hefter, Jens; Ronge, Thomas A; Geibert, Walter; Mollenhauer, Gesine; Gersonde, Rainer; Lamy, Frank (2017): A biomarker perspective on dust, productivity and sea surface temperature in the Pacific sector of the Southern Ocean. Geochimica et Cosmochimica Acta, 204, 120-139, https://doi.org/10.1016/j.gca.2017.01.045 AWI_MarGeoChem AWI_Paleo Marine Geochemistry @ AWI Paleoenvironmental Reconstructions from Marine Sediments @ AWI Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.860667 https://doi.org/10.1016/j.gca.2017.01.045 2023-01-20T07:33:44Z In this study, we present a new multiproxy data set of terrigenous input, marine productivity and sea surface temperature (SST) from 52 surface sediment samples collected along E-W transects in the Pacific sector of the Southern Ocean. Allochtonous terrigenous input was characterized by the distribution of plant wax n-alkanes and soil-derived branched glycerol dialkyl glycerol tetraethers (brGDGTs). 230Th-normalized burial rates of both compound groups were highest close to the potential sources in Australia and New Zealand and are strongly related to lithogenic contents, indicating common sources and transport. Detection of both long-chain n-alkanes and brGDGTs at the most remote sites in the open ocean strongly suggests a primarily eolian transport mechanism to at least 110°W, i.e. by prevailing westerly winds. Two independent organic SST proxies were used, the UK'37 based on long-chain alkenones, and the TEX86 based on isoprenoid GDGTs. Both, UK'37 and TEX86 indices show robust relationships with temperature over a temperature range between 0.5 and 20°C, likely implying different seasonal and regional imprints on the temperature signal. While alkenone-based temperature estimates reliably reflect modern SST even at the low temperature end, large temperature residuals are observed for the polar ocean using the TEX86 index. 230Th-normalized burial rates of alkenones are highest close to the Subtropical Front and are positively related to lithogenic fluxes throughout the study area. In contrast, highest isoGDGT burial south of the Antarctic Polar Front is not related with dust flux but may be largely controlled by diatom blooms, and thus high opal fluxes during austral summer. Dataset Antarc* Antarctic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean The Antarctic Austral Pacific New Zealand ENVELOPE(174.101800,-79.916500,-35.994170,-68.730330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_MarGeoChem AWI_Paleo Marine Geochemistry @ AWI Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
spellingShingle |
AWI_MarGeoChem AWI_Paleo Marine Geochemistry @ AWI Paleoenvironmental Reconstructions from Marine Sediments @ AWI Jaeschke, Andrea Wengler, Marc Hefter, Jens Ronge, Thomas A Geibert, Walter Mollenhauer, Gesine Gersonde, Rainer Lamy, Frank Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers |
topic_facet |
AWI_MarGeoChem AWI_Paleo Marine Geochemistry @ AWI Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
description |
In this study, we present a new multiproxy data set of terrigenous input, marine productivity and sea surface temperature (SST) from 52 surface sediment samples collected along E-W transects in the Pacific sector of the Southern Ocean. Allochtonous terrigenous input was characterized by the distribution of plant wax n-alkanes and soil-derived branched glycerol dialkyl glycerol tetraethers (brGDGTs). 230Th-normalized burial rates of both compound groups were highest close to the potential sources in Australia and New Zealand and are strongly related to lithogenic contents, indicating common sources and transport. Detection of both long-chain n-alkanes and brGDGTs at the most remote sites in the open ocean strongly suggests a primarily eolian transport mechanism to at least 110°W, i.e. by prevailing westerly winds. Two independent organic SST proxies were used, the UK'37 based on long-chain alkenones, and the TEX86 based on isoprenoid GDGTs. Both, UK'37 and TEX86 indices show robust relationships with temperature over a temperature range between 0.5 and 20°C, likely implying different seasonal and regional imprints on the temperature signal. While alkenone-based temperature estimates reliably reflect modern SST even at the low temperature end, large temperature residuals are observed for the polar ocean using the TEX86 index. 230Th-normalized burial rates of alkenones are highest close to the Subtropical Front and are positively related to lithogenic fluxes throughout the study area. In contrast, highest isoGDGT burial south of the Antarctic Polar Front is not related with dust flux but may be largely controlled by diatom blooms, and thus high opal fluxes during austral summer. |
format |
Dataset |
author |
Jaeschke, Andrea Wengler, Marc Hefter, Jens Ronge, Thomas A Geibert, Walter Mollenhauer, Gesine Gersonde, Rainer Lamy, Frank |
author_facet |
Jaeschke, Andrea Wengler, Marc Hefter, Jens Ronge, Thomas A Geibert, Walter Mollenhauer, Gesine Gersonde, Rainer Lamy, Frank |
author_sort |
Jaeschke, Andrea |
title |
Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers |
title_short |
Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers |
title_full |
Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers |
title_fullStr |
Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers |
title_full_unstemmed |
Terrigenous input and marine productivity for the Pacific sector of the Southern Ocean based on lipid biomarkers |
title_sort |
terrigenous input and marine productivity for the pacific sector of the southern ocean based on lipid biomarkers |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.860667 https://doi.org/10.1594/PANGAEA.860667 |
op_coverage |
MEDIAN LATITUDE: -47.511930 * MEDIAN LONGITUDE: -136.843778 * SOUTH-BOUND LATITUDE: -68.730330 * WEST-BOUND LONGITUDE: 174.101800 * NORTH-BOUND LATITUDE: -35.994170 * EAST-BOUND LONGITUDE: -79.916500 * DATE/TIME START: 2009-12-07T20:39:00 * DATE/TIME END: 2011-03-05T02:21:00 |
long_lat |
ENVELOPE(174.101800,-79.916500,-35.994170,-68.730330) |
geographic |
Antarctic Southern Ocean The Antarctic Austral Pacific New Zealand |
geographic_facet |
Antarctic Southern Ocean The Antarctic Austral Pacific New Zealand |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Supplement to: Jaeschke, Andrea; Wengler, Marc; Hefter, Jens; Ronge, Thomas A; Geibert, Walter; Mollenhauer, Gesine; Gersonde, Rainer; Lamy, Frank (2017): A biomarker perspective on dust, productivity and sea surface temperature in the Pacific sector of the Southern Ocean. Geochimica et Cosmochimica Acta, 204, 120-139, https://doi.org/10.1016/j.gca.2017.01.045 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.860667 https://doi.org/10.1594/PANGAEA.860667 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.860667 https://doi.org/10.1016/j.gca.2017.01.045 |
_version_ |
1766206428359426048 |