Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean
Fluxes of lithogenic material and fluxes of three palaeo-productivity proxies (organic carbon, biogenic opal and alkenones) over the past 100 000 years were determined using the 230Th-normalization method in three sediment cores from the Subantarctic South Atlantic Ocean. Features in the lithogenic...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:60173 2023-05-15T13:38:47+02:00 Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean Anderson, Robert F. Barker, Stephen Fleisher, Martin Gersonde, Rainer Goldstein, Steven L. Kuhn, Gerhard Mortyn, P. Graham Pahnke, Katharina Sachs, Julian P. 2014-07-13 https://orca.cardiff.ac.uk/id/eprint/60173/ https://doi.org/10.1098/rsta.2013.0054 unknown The Royal Society Anderson, Robert F., Barker, Stephen https://orca.cardiff.ac.uk/view/cardiffauthors/A015364W.html orcid:0000-0001-7870-6431 orcid:0000-0001-7870-6431, Fleisher, Martin, Gersonde, Rainer, Goldstein, Steven L., Kuhn, Gerhard, Mortyn, P. Graham, Pahnke, Katharina and Sachs, Julian P. 2014. Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372 (2019) , 20130054. 10.1098/rsta.2013.0054 https://doi.org/10.1098/rsta.2013.0054 doi:10.1098/rsta.2013.0054 GC Oceanography Article PeerReviewed 2014 ftunivcardiff https://doi.org/10.1098/rsta.2013.0054 2022-10-27T22:38:50Z Fluxes of lithogenic material and fluxes of three palaeo-productivity proxies (organic carbon, biogenic opal and alkenones) over the past 100 000 years were determined using the 230Th-normalization method in three sediment cores from the Subantarctic South Atlantic Ocean. Features in the lithogenic flux record of each core correspond to similar features in the record of dust deposition in the EPICA Dome C ice core. Biogenic fluxes correlate with lithogenic fluxes in each sediment core. Our preferred interpretation is that South American dust, most probably from Patagonia, constitutes a major source of lithogenic material in Subantarctic South Atlantic sediments, and that past biological productivity in this region responded to variability in the supply of dust, probably due to biologically available iron carried by the dust. Greater nutrient supply as well as greater nutrient utilization (stimulated by dust) contributed to Subantarctic productivity during cold periods, in contrast to the region south of the Antarctic Polar Front (APF), where reduced nutrient supply during cold periods was the principal factor limiting productivity. The anti-phased patterns of productivity on opposite sides of the APF point to shifts in the physical supply of nutrients and to dust as cofactors regulating productivity in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic EPICA ice core South Atlantic Ocean Southern Ocean Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Patagonia Southern Ocean The Antarctic Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372 2019 20130054 |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
GC Oceanography |
spellingShingle |
GC Oceanography Anderson, Robert F. Barker, Stephen Fleisher, Martin Gersonde, Rainer Goldstein, Steven L. Kuhn, Gerhard Mortyn, P. Graham Pahnke, Katharina Sachs, Julian P. Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean |
topic_facet |
GC Oceanography |
description |
Fluxes of lithogenic material and fluxes of three palaeo-productivity proxies (organic carbon, biogenic opal and alkenones) over the past 100 000 years were determined using the 230Th-normalization method in three sediment cores from the Subantarctic South Atlantic Ocean. Features in the lithogenic flux record of each core correspond to similar features in the record of dust deposition in the EPICA Dome C ice core. Biogenic fluxes correlate with lithogenic fluxes in each sediment core. Our preferred interpretation is that South American dust, most probably from Patagonia, constitutes a major source of lithogenic material in Subantarctic South Atlantic sediments, and that past biological productivity in this region responded to variability in the supply of dust, probably due to biologically available iron carried by the dust. Greater nutrient supply as well as greater nutrient utilization (stimulated by dust) contributed to Subantarctic productivity during cold periods, in contrast to the region south of the Antarctic Polar Front (APF), where reduced nutrient supply during cold periods was the principal factor limiting productivity. The anti-phased patterns of productivity on opposite sides of the APF point to shifts in the physical supply of nutrients and to dust as cofactors regulating productivity in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Anderson, Robert F. Barker, Stephen Fleisher, Martin Gersonde, Rainer Goldstein, Steven L. Kuhn, Gerhard Mortyn, P. Graham Pahnke, Katharina Sachs, Julian P. |
author_facet |
Anderson, Robert F. Barker, Stephen Fleisher, Martin Gersonde, Rainer Goldstein, Steven L. Kuhn, Gerhard Mortyn, P. Graham Pahnke, Katharina Sachs, Julian P. |
author_sort |
Anderson, Robert F. |
title |
Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean |
title_short |
Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean |
title_full |
Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean |
title_fullStr |
Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean |
title_full_unstemmed |
Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean |
title_sort |
biological response to millennial variability of dust and nutrient supply in the subantarctic south atlantic ocean |
publisher |
The Royal Society |
publishDate |
2014 |
url |
https://orca.cardiff.ac.uk/id/eprint/60173/ https://doi.org/10.1098/rsta.2013.0054 |
geographic |
Antarctic Patagonia Southern Ocean The Antarctic |
geographic_facet |
Antarctic Patagonia Southern Ocean The Antarctic |
genre |
Antarc* Antarctic EPICA ice core South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic EPICA ice core South Atlantic Ocean Southern Ocean |
op_relation |
Anderson, Robert F., Barker, Stephen https://orca.cardiff.ac.uk/view/cardiffauthors/A015364W.html orcid:0000-0001-7870-6431 orcid:0000-0001-7870-6431, Fleisher, Martin, Gersonde, Rainer, Goldstein, Steven L., Kuhn, Gerhard, Mortyn, P. Graham, Pahnke, Katharina and Sachs, Julian P. 2014. Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372 (2019) , 20130054. 10.1098/rsta.2013.0054 https://doi.org/10.1098/rsta.2013.0054 doi:10.1098/rsta.2013.0054 |
op_doi |
https://doi.org/10.1098/rsta.2013.0054 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
372 |
container_issue |
2019 |
container_start_page |
20130054 |
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1766111087875325952 |