Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation | |
Bailey, I (Bailey, Ian)1; Liu, QS (Liu, Qingsong)2; Swann, GEA (Swann, George E. A.)3; Jiang, ZX (Jiang, Zhaoxia)2; Sun, YB (Sun, Youbin)4; Zhao, X (Zhao, Xiang)1; Roberts, AP (Roberts, Andrew P.)1 | |
2011-07-15 | |
发表期刊 | EARTH AND PLANETARY SCIENCE LETTERS |
卷号 | 307期号:3-4页码:253-265 |
文章类型 | 期刊论文 |
摘要 | Increases in the low-field mass-specific magnetic susceptibility (chi), dropstones and the terrigenous sediment component from Ocean Drilling Program (ODP) Site 882 (similar to 45 degrees 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 similar to 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 chi increase, we present new high-resolution environmental magnetic and ice-rafted debris records from ODP Sites 882 and 885. Our results demonstrate that the chi 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 chi as a proxy for ice-rafting to the North Pacific. They also highlight a previously undocumented link between iron fertilisation and biogeochemical cycling in the North Pacific at a key stage during intensification of late Pliocene northern hemisphere glaciation. |
关键词 | aeolian dust volcanic glass ice rafted debris North Pacific nutrient use northern hemisphere glaciation |
DOI | 10.1016/j.epsl.2011.05.029 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10340 |
专题 | 古环境研究室 |
通讯作者 | Bailey, I (Bailey, Ian)1; Sun, YB (Sun, Youbin)4 |
作者单位 | 1.School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, European Way, Southampton SO14 3ZH, UK; 2.Paleomagnetism and Geochronology Laboratory (SKL-LE), Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China; 3.School of Geography, University of Nottingham, University Park, Nottingham, NG7 2RD, UK; 4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, People's Republic of China |
推荐引用方式 GB/T 7714 | Bailey, I ,Liu, QS ,Swann, GEA ,et al. Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation[J]. EARTH AND PLANETARY SCIENCE LETTERS,2011,307(3-4):253-265. |
APA | Bailey, I .,Liu, QS .,Swann, GEA .,Jiang, ZX .,Sun, YB .,...&Roberts, AP .(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. |
MLA | Bailey, I ,et al."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(2011):253-265. |
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