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Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bailey, Ian Liu, Qingsong Swann, George E. A. Jiang, Zhaoxia Sun, Youbin Zhao, X. G. Roberts, Andrew Peter |
| Copyright Year | 2011 |
| Abstract | 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. |
| Starting Page | 253 |
| Ending Page | 265 |
| Page Count | 13 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.epsl.2011.05.029 |
| Alternate Webpage(s) | http://people.rses.anu.edu.au/roberts_a/AR_Publications/133_Bailey_et_al_2011.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.epsl.2011.05.029 |
| Volume Number | 307 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
