| Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change | |
Jia, Qi1,3 ; Li, Tiegang2,3,4; Xiong, Zhifang2,4; Steinke, Stephan5; Jiang, Fuqing1,4; Chang, Fengming1,4; Qin, Bingbin2
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| 2018-03-15 | |
| 发表期刊 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
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| ISSN | 0031-0182 |
| 卷号 | 493页码:44-54 |
| 通讯作者 | Li, Tiegang(tgli@fio.org.cn) ; Xiong, Zhifang(zhfxiong@fio.org.cn) |
| 摘要 | El Nino/Southern Oscillation (ENSO) events and latitudinal shifts of the Intertropical Convergence Zone (ITCZ) cause large scale hydrologic changes in the western tropical Pacific (WTP). However, there is still a debate on the role of ENSO and ITCZ shifts on the hydroclimate in the WTP and their linkage to Northern Hemisphere climate change on glacial-interglacial timescales. For that reason, we present ice volume-corrected seawater delta O-18 (delta O-18(sw-ice), a proxy for salinity) and sea surface temperature (SST) records from IMAGES Core MD06-3047B recovered from the northern WTP to investigate the hydroclimate in the WTP during the last 700 kyr. Planktic foraminifera Globigerinoides ruber based Mg/Ca-SST and delta O-18(sw-ice) the records reveal distinct glacial-interglacial variations. The delta O-18(sw-ice) record shows that our study site is characterized by fresher conditions and thus higher precipitation during glacials than during interglacials. Our results are in good agreement with numerical model simulations, which also suggest a glacial freshening in the northern WTP. A glacial freshening of the WTP is most likely related to a substantial weakening of the Atlantic Meridional Overturning Circulation (AMOC) and/or exposure of the Maritime Continent due to sea level changes which resulted in an enhanced Pacific Walker circulation and/or southward shift of the ITCZ. In addition, SST records from the WTP and the eastern tropical Pacific (ETP) suggest an enhanced tropical Pacific zonal SST gradient and thus La Nina-like conditions, which may have contributed to fresher conditions in the WTP during glacial periods. Besides, our rainfall record is in antiphase to the Chinese speleothem delta O-18 records, supporting the idea of an opposing trend in precipitation changes between the WTP and East Asia on orbital timescales. |
| 关键词 | Western Philippine Sea Seawater delta O-18 estimates Sea surface temperature ENSO ITCZ AMOC |
| DOI | 10.1016/j.palaeo.2017.12.039 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Open Fund of Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0205] ; National Natural Science Foundation of China[41230959] ; National Natural Science Foundation of China[41106042] ; National Natural Science Foundation of China[41576051] ; National Natural Science Foundation of China[41776065] ; National Natural Science Foundation of China[41576050] ; National Special Project for Global Change and Air-Sea Interaction[GASI-GEOGE-04] ; Open Fund of Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0205] ; National Natural Science Foundation of China[41230959] ; National Natural Science Foundation of China[41106042] ; National Natural Science Foundation of China[41576051] ; National Natural Science Foundation of China[41776065] ; National Natural Science Foundation of China[41576050] ; National Special Project for Global Change and Air-Sea Interaction[GASI-GEOGE-04] |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
| WOS记录号 | WOS:000425071100005 |
| 出版者 | ELSEVIER SCIENCE BV |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/158082 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Li, Tiegang; Xiong, Zhifang |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 5.Xiamen Univ, Coll Ocean & Earth Sci, Dept Geol Oceanog, Xiamen 361102, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Jia, Qi,Li, Tiegang,Xiong, Zhifang,et al. Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2018,493:44-54. |
| APA | Jia, Qi.,Li, Tiegang.,Xiong, Zhifang.,Steinke, Stephan.,Jiang, Fuqing.,...&Qin, Bingbin.(2018).Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,493,44-54. |
| MLA | Jia, Qi,et al."Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 493(2018):44-54. |
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| Hydrological variabi（1398KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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