Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation
Increases in the low-field mass-specific magnetic susceptibility (?), dropstones and the terrigenous sediment component from Ocean Drilling Program (ODP) Site 882 (~45°N) have been interpreted to indicate a major onset of ice-rafting to the sub-Arctic northwest Pacific Ocean during marine isotope st...
Published in: | Earth and Planetary Science Letters |
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2011
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Online Access: | https://eprints.soton.ac.uk/187715/ |
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ftsouthampton:oai:eprints.soton.ac.uk:187715 2023-07-30T03:59:55+02:00 Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation Bailey, Ian Liu, Qingsong Swann, George E.A. Jiang, Zhaozia Sun, Youbin Zhao, Xiang Roberts, Andrew P. 2011-07-15 https://eprints.soton.ac.uk/187715/ unknown Bailey, Ian, Liu, Qingsong, Swann, George E.A., Jiang, Zhaozia, Sun, Youbin, Zhao, Xiang and Roberts, Andrew P. (2011) Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation. Earth and Planetary Science Letters, 307 (3-4), 253-265. (doi:10.1016/j.epsl.2011.05.029 <http://dx.doi.org/10.1016/j.epsl.2011.05.029>). Article PeerReviewed 2011 ftsouthampton https://doi.org/10.1016/j.epsl.2011.05.029 2023-07-09T21:22:00Z Increases in the low-field mass-specific magnetic susceptibility (?), dropstones and the terrigenous sediment component from Ocean Drilling Program (ODP) Site 882 (~45°N) have been interpreted to indicate a major onset of ice-rafting to the sub-Arctic northwest Pacific Ocean during marine isotope stage (MIS) G6 (from ~2.75 Ma). In contrast, studies of the terrigenous content of sediments cored downwind of ODP Site 882 indicate that dust and disseminated volcanic ash deposition in the sub-Arctic Pacific increased markedly during MIS G6. To investigate the relative contribution of dust, volcanic ash and ice rafting to the Pliocene ? increase, we present new high-resolution environmental magnetic and ice-rafted debris records from ODP sites 882 and 885. Our results demonstrate that the ? increase at both sites across MIS G6 is predominantly controlled by a previously overlooked mixture of aeolian dust and volcanic ash. Our findings call into question the reliability of ? as a proxy for ice-rafting to the North Pacific. They also highlight a previously undocumented link between iron fertilization and biogeochemical cycling in the North Pacific at a key stage during intensification of late Pliocene northern hemisphere glaciation. Article in Journal/Newspaper Arctic Arctic Magnetic susceptibility University of Southampton: e-Prints Soton Arctic Pacific Earth and Planetary Science Letters 307 3-4 253 265 |
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Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Increases in the low-field mass-specific magnetic susceptibility (?), dropstones and the terrigenous sediment component from Ocean Drilling Program (ODP) Site 882 (~45°N) have been interpreted to indicate a major onset of ice-rafting to the sub-Arctic northwest Pacific Ocean during marine isotope stage (MIS) G6 (from ~2.75 Ma). In contrast, studies of the terrigenous content of sediments cored downwind of ODP Site 882 indicate that dust and disseminated volcanic ash deposition in the sub-Arctic Pacific increased markedly during MIS G6. To investigate the relative contribution of dust, volcanic ash and ice rafting to the Pliocene ? increase, we present new high-resolution environmental magnetic and ice-rafted debris records from ODP sites 882 and 885. Our results demonstrate that the ? increase at both sites across MIS G6 is predominantly controlled by a previously overlooked mixture of aeolian dust and volcanic ash. Our findings call into question the reliability of ? as a proxy for ice-rafting to the North Pacific. They also highlight a previously undocumented link between iron fertilization and biogeochemical cycling in the North Pacific at a key stage during intensification of late Pliocene northern hemisphere glaciation. |
format |
Article in Journal/Newspaper |
author |
Bailey, Ian Liu, Qingsong Swann, George E.A. Jiang, Zhaozia Sun, Youbin Zhao, Xiang Roberts, Andrew P. |
spellingShingle |
Bailey, Ian Liu, Qingsong Swann, George E.A. Jiang, Zhaozia Sun, Youbin Zhao, Xiang Roberts, Andrew P. Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation |
author_facet |
Bailey, Ian Liu, Qingsong Swann, George E.A. Jiang, Zhaozia Sun, Youbin Zhao, Xiang Roberts, Andrew P. |
author_sort |
Bailey, Ian |
title |
Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation |
title_short |
Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation |
title_full |
Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation |
title_fullStr |
Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation |
title_full_unstemmed |
Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation |
title_sort |
iron fertilisation and biogeochemical cycles in the sub-arctic northwest pacific during the late pliocene intensification of northern hemisphere glaciation |
publishDate |
2011 |
url |
https://eprints.soton.ac.uk/187715/ |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Arctic Magnetic susceptibility |
genre_facet |
Arctic Arctic Magnetic susceptibility |
op_relation |
Bailey, Ian, Liu, Qingsong, Swann, George E.A., Jiang, Zhaozia, Sun, Youbin, Zhao, Xiang and Roberts, Andrew P. (2011) Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation. Earth and Planetary Science Letters, 307 (3-4), 253-265. (doi:10.1016/j.epsl.2011.05.029 <http://dx.doi.org/10.1016/j.epsl.2011.05.029>). |
op_doi |
https://doi.org/10.1016/j.epsl.2011.05.029 |
container_title |
Earth and Planetary Science Letters |
container_volume |
307 |
container_issue |
3-4 |
container_start_page |
253 |
op_container_end_page |
265 |
_version_ |
1772810625739653120 |