Low latitude hydro-climatic changes during the plio-pleistocene: Evidence from high resolution alkane records in the southern South China Sea
| dc.contributor.author | Li, L. | |
| dc.contributor.author | Li, Q. | |
| dc.contributor.author | Tian, J. | |
| dc.contributor.author | Wang, H. | |
| dc.contributor.author | Wang, P. | |
| dc.date.issued | 2013 | |
| dc.description.abstract | High resolution records of long chain n-alkane biomarkers from the southern South China Sea reveal tightly response of n-alkane distribution to hydro-climate changes over the past 5Ma, with increasing longer chain n-C<inf>31</inf> alkanes indicating a correlation with drier conditions and increasing shorter chain n-C<inf>27</inf> alkanes with wetter conditions. The variations of the C<inf>31</inf>/C<inf>27</inf> ratio, or the alkane chain length index, imply humid conditions before 2.9Ma, progressively reduced moisture since then and to bigger fluctuations between wet and dry conditions since 1.2Ma. This long term hydro-climate trend is superimposed by glacial dry and interglacial wet patterns over the Plio-Pleistocene glacial cycles. Combined with other proxy records, our results indicate that precipitation over the tropical Asia-Pacific strengthened before the onset of the northern hemisphere glaciation and the mid-Pleistocene climate transition at about 1.2Ma. These dramatic humidity changes over major climate transitions imply a crucial role of tropical hydrology dynamics on global climate change in the late Cenozoic. © 2013 Elsevier Ltd. | |
| dc.description.statementofresponsibility | Li Li, Qianyu Li, Jun Tian, Hui Wang, Pinxian Wang | |
| dc.identifier.citation | Quaternary Science Reviews: the international multidisciplinary research and review journal, 2013; 78:209-224 | |
| dc.identifier.doi | 10.1016/j.quascirev.2013.08.007 | |
| dc.identifier.issn | 0277-3791 | |
| dc.identifier.uri | http://hdl.handle.net/2440/81352 | |
| dc.language.iso | en | |
| dc.publisher | Pergamon-Elsevier Science Ltd | |
| dc.rights | Copyright © 2013 Elsevier Ltd. | |
| dc.source.uri | https://doi.org/10.1016/j.quascirev.2013.08.007 | |
| dc.subject | Plio-Pleistocene | |
| dc.subject | Plant n-alkanes | |
| dc.subject | n-Alkane chain lengths | |
| dc.subject | Hydro-climate | |
| dc.title | Low latitude hydro-climatic changes during the plio-pleistocene: Evidence from high resolution alkane records in the southern South China Sea | |
| dc.type | Journal article | |
| pubs.publication-status | Published |