Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ...
Changes in Southern Ocean export production have broad biogeochemical and climatic implications. Specifically, iron fertilization likely increased subantarctic nutrient utilization and enhanced the efficiency of the biological pump during glacials. However, past export production in the subantarctic...
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ftdatacite:10.1594/pangaea.934588 2023-07-23T04:19:02+02:00 Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... Toyos, Maria H Winckler, Gisela Arz, Helge Wolfgang Lembke-Jene, Lester Lange, Carina Beatriz Kuhn, Gerhard Lamy, Frank 2021 application/zip https://dx.doi.org/10.1594/pangaea.934588 https://doi.pangaea.de/10.1594/PANGAEA.934588 en eng PANGAEA https://dx.doi.org/10.5194/cp-18-147-2022 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Drake Passage glacial-interglacial changes iron fertilization Mass accumulation rates paleoproductivity Southern Ocean Subantarctic zone thorium normalization Collection article Bundled Publication of Datasets 2021 ftdatacite https://doi.org/10.1594/pangaea.93458810.5194/cp-18-147-2022 2023-07-03T22:05:33Z Changes in Southern Ocean export production have broad biogeochemical and climatic implications. Specifically, iron fertilization likely increased subantarctic nutrient utilization and enhanced the efficiency of the biological pump during glacials. However, past export production in the subantarctic Southeast Pacific is poorly documented, and its connection to Fe fertilization, potentially related to Patagonian Ice Sheet dynamics is unknown. We report biological productivity changes over the past 400 ka, based on a combination of 230Thxs-normalized and stratigraphy-based mass accumulation rates of biogenic barium, organic carbon, biogenic opal, and calcium carbonate as indicators of paleo-export production in a sediment core upstream of the Drake Passage (57.5º S; 70.3º W). In addition, we use fluxes of iron and lithogenic material as proxies for terrigenous input, and thus potential micronutrient supply. Stratigraphy-based mass accumulation rates are strongly influenced by bottom-current dynamics, which ... Article in Journal/Newspaper Drake Passage Ice Sheet Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Drake Passage Pacific Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drake Passage glacial-interglacial changes iron fertilization Mass accumulation rates paleoproductivity Southern Ocean Subantarctic zone thorium normalization |
spellingShingle |
Drake Passage glacial-interglacial changes iron fertilization Mass accumulation rates paleoproductivity Southern Ocean Subantarctic zone thorium normalization Toyos, Maria H Winckler, Gisela Arz, Helge Wolfgang Lembke-Jene, Lester Lange, Carina Beatriz Kuhn, Gerhard Lamy, Frank Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... |
topic_facet |
Drake Passage glacial-interglacial changes iron fertilization Mass accumulation rates paleoproductivity Southern Ocean Subantarctic zone thorium normalization |
description |
Changes in Southern Ocean export production have broad biogeochemical and climatic implications. Specifically, iron fertilization likely increased subantarctic nutrient utilization and enhanced the efficiency of the biological pump during glacials. However, past export production in the subantarctic Southeast Pacific is poorly documented, and its connection to Fe fertilization, potentially related to Patagonian Ice Sheet dynamics is unknown. We report biological productivity changes over the past 400 ka, based on a combination of 230Thxs-normalized and stratigraphy-based mass accumulation rates of biogenic barium, organic carbon, biogenic opal, and calcium carbonate as indicators of paleo-export production in a sediment core upstream of the Drake Passage (57.5º S; 70.3º W). In addition, we use fluxes of iron and lithogenic material as proxies for terrigenous input, and thus potential micronutrient supply. Stratigraphy-based mass accumulation rates are strongly influenced by bottom-current dynamics, which ... |
format |
Article in Journal/Newspaper |
author |
Toyos, Maria H Winckler, Gisela Arz, Helge Wolfgang Lembke-Jene, Lester Lange, Carina Beatriz Kuhn, Gerhard Lamy, Frank |
author_facet |
Toyos, Maria H Winckler, Gisela Arz, Helge Wolfgang Lembke-Jene, Lester Lange, Carina Beatriz Kuhn, Gerhard Lamy, Frank |
author_sort |
Toyos, Maria H |
title |
Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... |
title_short |
Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... |
title_full |
Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... |
title_fullStr |
Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... |
title_full_unstemmed |
Concentration, accumulation rates, Th fluxes, focusing factors, and productivity proxies on core PS97/093-2 over the past 400,000 years ... |
title_sort |
concentration, accumulation rates, th fluxes, focusing factors, and productivity proxies on core ps97/093-2 over the past 400,000 years ... |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://dx.doi.org/10.1594/pangaea.934588 https://doi.pangaea.de/10.1594/PANGAEA.934588 |
geographic |
Drake Passage Pacific Southern Ocean |
geographic_facet |
Drake Passage Pacific Southern Ocean |
genre |
Drake Passage Ice Sheet Southern Ocean |
genre_facet |
Drake Passage Ice Sheet Southern Ocean |
op_relation |
https://dx.doi.org/10.5194/cp-18-147-2022 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.1594/pangaea.93458810.5194/cp-18-147-2022 |
_version_ |
1772181799527514112 |