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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Online Access: | https://epic.awi.de/id/eprint/35804/ http://rsta.royalsocietypublishing.org/content/372/2019/20130054 https://hdl.handle.net/10013/epic.43712 |
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ftawi:oai:epic.awi.de:35804 2023-05-15T13:40:26+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. 2014-06-13 https://epic.awi.de/id/eprint/35804/ http://rsta.royalsocietypublishing.org/content/372/2019/20130054 https://hdl.handle.net/10013/epic.43712 unknown Royal Society Publishing Anderson, R. F. , Barker, S. , Fleisher, M. , Gersonde, R. , Goldstein, S. L. , Kuhn, G. orcid:0000-0001-6069-7485 , Mortyn, P. G. , Pahnke, K. and Sachs, J. 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), p. 20130054 . doi:10.1098/rsta.2013.0054 <https://doi.org/10.1098/rsta.2013.0054> , hdl:10013/epic.43712 EPIC3Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society Publishing, 372(2019), pp. 20130054-20130054, ISSN: 1364-503X Article peerRev 2014 ftawi https://doi.org/10.1098/rsta.2013.0054 2021-12-24T15:39:38Z 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean The Antarctic Patagonia Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372 2019 20130054 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
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. |
spellingShingle |
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 |
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 |
Royal Society Publishing |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35804/ http://rsta.royalsocietypublishing.org/content/372/2019/20130054 https://hdl.handle.net/10013/epic.43712 |
geographic |
Antarctic Southern Ocean The Antarctic Patagonia |
geographic_facet |
Antarctic Southern Ocean The Antarctic Patagonia |
genre |
Antarc* Antarctic EPICA ice core South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic EPICA ice core South Atlantic Ocean Southern Ocean |
op_source |
EPIC3Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society Publishing, 372(2019), pp. 20130054-20130054, ISSN: 1364-503X |
op_relation |
Anderson, R. F. , Barker, S. , Fleisher, M. , Gersonde, R. , Goldstein, S. L. , Kuhn, G. orcid:0000-0001-6069-7485 , Mortyn, P. G. , Pahnke, K. and Sachs, J. 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), p. 20130054 . doi:10.1098/rsta.2013.0054 <https://doi.org/10.1098/rsta.2013.0054> , hdl:10013/epic.43712 |
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 |
_version_ |
1766134038111715328 |