Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years
The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report a high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, c...
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ftcsic:oai:digital.csic.es:10261/318728 2024-02-11T09:57:34+01:00 Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years Weber, M.E. Bailey, I. Hemming, S.R. Martos, Y.M. Reilly, B.T. Ronge, T.A. Brachfeld, S. Williams, T. Raymo, M. Belt, M. Smik, L. vogel, H. Peck, V. Armbrecht, L. Cage, A. Cardillo, F.G. Du, Z. Fauth, G. Fogwill, C.J. García-García, Margarita 2022-04-19 http://hdl.handle.net/10508/15910 http://hdl.handle.net/10261/318728 https://doi.org/10.1038/s41467-022-29642-5 en eng Centro Oceanográfico de Cádiz AM https://www.nature.com/articles/s41467-022-29642-5 Nature Communications, 13. 2022: 2044-2060 http://hdl.handle.net/10508/15910 http://hdl.handle.net/10261/318728 doi:10.1038/s41467-022-29642-5 50228 2041-1723 open Medio Marino Centro Oceanográfico de Cádiz carbon cycle antarctic zone ice ages carbon pleistocene research article 2022 ftcsic https://doi.org/10.1038/s41467-022-29642-5 2024-01-16T11:45:15Z The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report a high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a 5 to 15-fold increase in dust deposition during glacials and a 2 to 5-fold increase in biogenic silica deposition, reflecting higher ocean productivity during interglacials. This antiphasing persisted throughout the last 25 glacial cycles. Dust deposition became more pronounced across the Mid-Pleistocene Transition (MPT) in the Southern Hemisphere, with an abrupt shift suggesting more severe glaciations since ~0.9 Ma. Productivity was intermediate pre-MPT, lowest during the MPT and highest since 0.4 Ma. Generally, glacials experienced extended sea-ice cover, reduced bottom-water export and Weddell Gyre dynamics, which helped lower atmospheric CO2 levels. SI Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Southern Ocean The Antarctic Patagonia Weddell Nature Communications 13 1 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Medio Marino Centro Oceanográfico de Cádiz carbon cycle antarctic zone ice ages carbon pleistocene |
spellingShingle |
Medio Marino Centro Oceanográfico de Cádiz carbon cycle antarctic zone ice ages carbon pleistocene Weber, M.E. Bailey, I. Hemming, S.R. Martos, Y.M. Reilly, B.T. Ronge, T.A. Brachfeld, S. Williams, T. Raymo, M. Belt, M. Smik, L. vogel, H. Peck, V. Armbrecht, L. Cage, A. Cardillo, F.G. Du, Z. Fauth, G. Fogwill, C.J. García-García, Margarita Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years |
topic_facet |
Medio Marino Centro Oceanográfico de Cádiz carbon cycle antarctic zone ice ages carbon pleistocene |
description |
The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report a high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a 5 to 15-fold increase in dust deposition during glacials and a 2 to 5-fold increase in biogenic silica deposition, reflecting higher ocean productivity during interglacials. This antiphasing persisted throughout the last 25 glacial cycles. Dust deposition became more pronounced across the Mid-Pleistocene Transition (MPT) in the Southern Hemisphere, with an abrupt shift suggesting more severe glaciations since ~0.9 Ma. Productivity was intermediate pre-MPT, lowest during the MPT and highest since 0.4 Ma. Generally, glacials experienced extended sea-ice cover, reduced bottom-water export and Weddell Gyre dynamics, which helped lower atmospheric CO2 levels. SI |
format |
Article in Journal/Newspaper |
author |
Weber, M.E. Bailey, I. Hemming, S.R. Martos, Y.M. Reilly, B.T. Ronge, T.A. Brachfeld, S. Williams, T. Raymo, M. Belt, M. Smik, L. vogel, H. Peck, V. Armbrecht, L. Cage, A. Cardillo, F.G. Du, Z. Fauth, G. Fogwill, C.J. García-García, Margarita |
author_facet |
Weber, M.E. Bailey, I. Hemming, S.R. Martos, Y.M. Reilly, B.T. Ronge, T.A. Brachfeld, S. Williams, T. Raymo, M. Belt, M. Smik, L. vogel, H. Peck, V. Armbrecht, L. Cage, A. Cardillo, F.G. Du, Z. Fauth, G. Fogwill, C.J. García-García, Margarita |
author_sort |
Weber, M.E. |
title |
Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years |
title_short |
Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years |
title_full |
Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years |
title_fullStr |
Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years |
title_full_unstemmed |
Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years |
title_sort |
antiphased dust deposition and productivity in the antarctic zone over 1.5 million years |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/15910 http://hdl.handle.net/10261/318728 https://doi.org/10.1038/s41467-022-29642-5 |
geographic |
Antarctic Southern Ocean The Antarctic Patagonia Weddell |
geographic_facet |
Antarctic Southern Ocean The Antarctic Patagonia Weddell |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
Centro Oceanográfico de Cádiz AM https://www.nature.com/articles/s41467-022-29642-5 Nature Communications, 13. 2022: 2044-2060 http://hdl.handle.net/10508/15910 http://hdl.handle.net/10261/318728 doi:10.1038/s41467-022-29642-5 50228 2041-1723 |
op_rights |
open |
op_doi |
https://doi.org/10.1038/s41467-022-29642-5 |
container_title |
Nature Communications |
container_volume |
13 |
container_issue |
1 |
_version_ |
1790593107692093440 |