| 上新世以来南海海水表层温度（SST）的变化 |
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| 引用本文： | 毕东杰,张道军,翟世奎,刘新宇,修淳,刘晓锋,张爱滨.上新世以来南海海水表层温度（SST）的变化[J].海洋学报(英文版),2019,38(3):78-92. |
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| 作者姓名： | 毕东杰 张道军 翟世奎 刘新宇 修淳 刘晓锋 张爱滨 |
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| 作者单位： | 中国海洋大学, 海底科学与探测技术教育部重点实验室, 海洋地球科学学院, 山东 青岛 266100,中海石油(中国)有限公司, 湛江分公司研究院, 广东 湛江 524057,中国海洋大学, 海底科学与探测技术教育部重点实验室, 海洋地球科学学院, 山东 青岛 266100,中海石油(中国)有限公司, 湛江分公司研究院, 广东 湛江 524057,中国海洋大学, 海底科学与探测技术教育部重点实验室, 海洋地球科学学院, 山东 青岛 266100,中国海洋大学, 海底科学与探测技术教育部重点实验室, 海洋地球科学学院, 山东 青岛 266100,中国海洋大学, 海底科学与探测技术教育部重点实验室, 海洋地球科学学院, 山东 青岛 266100 |
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| 基金项目： | The National Science and Technology Major Project of China under contract No. 2011ZX05025-002-03; the Project of China National Offshore Oil Corporation (CNOOC) Limited under contract No. CCL2013ZJFNO729; the National Natural Science Foundation of China under contract No. 41530963. |
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| 摘 要： | The reconstruction of sea surface temperature(SST) is a key issue in research on paleoceanography. The recently related studies are mainly concentrated on the Quaternary. The skeletons of a typical species of benthonic foraminifer(Amphistegina radiata) in the top 0–375.30 m interval of Well "Xike-1" reef core, Shidao Island, the Xisha Islands, are uniformly selected. The ratios of magnesium to calcium concentrations and other indicators are analyzed by an electron microprobe analysis(EMPA) with the purpose of estimating the paleo-SSTs since the Pliocene and further investigating the periodic change law of paleoclimate in the South China Sea(SCS).Meanwhile, the geologic significance of paleoclimatic events in the SCS is discussed with global perspectives. The results indicate that the paleo-SSTs reconstructed by the ratios of magnesium to calcium concentrations in the SCS show a general periodic trend of "high–low–high–low" in values changes since the Pliocene. By comparison,the fluctuations of reconstructed paleo-SSTs are much stronger in the Quaternary. Moreover, the variations of the ratios of magnesium to calcium concentrations in the A. radiata skeletons have recorded a series of major paleoclimatic events since the Pliocene, of which the Quaternary glaciation events and the Arctic ice cap forming events during the late Pliocene are more significant. Thus, using the changes of the ratios of magnesium to calcium concentrations in the A. radiata skeletons from Well "Xike-1" reef core to reflect the relative changes of paleo-SSTs is a relatively feasible and reliable way in the SCS, which is also proved by the correlation of drilling cores characteristics in this area.
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| 关 键 词： | Mg/Ca比值法 有孔虫（双盖虫） 古海水表层温度（SST） 古气候变化事件 |
| 收稿时间： | 2017/11/15 0:00:00 |
The relative changes of a sea surface temperature in the South China Sea since the Pliocene |
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| BI Dongjie,ZHANG Daojun,ZHAI Shikui,LIU Xinyu,XIU Chun,LIU Xiaofeng and ZHANG Aibin.The relative changes of a sea surface temperature in the South China Sea since the Pliocene[J].Acta Oceanologica Sinica,2019,38(3):78-92. |
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| Authors: | BI Dongjie ZHANG Daojun ZHAI Shikui LIU Xinyu XIU Chun LIU Xiaofeng and ZHANG Aibin |
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| Institution: | 1.Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China2.Zhanjiang Branch Institute of China National Offshore Oil Corporation (CNOOC) Limited, Zhanjiang 524057, China |
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| Abstract: | The reconstruction of sea surface temperature (SST) is a key issue in research on paleoceanography. The recently related studies are mainly concentrated on the Quaternary. The skeletons of a typical species of benthonic foraminifer (Amphistegina radiata) in the top 0-375.30 m interval of Well "Xike-1" reef core, Shidao Island, the Xisha Islands, are uniformly selected. The ratios of magnesium to calcium concentrations and other indicators are analyzed by an electron microprobe analysis (EMPA) with the purpose of estimating the paleo-SSTs since the Pliocene and further investigating the periodic change law of paleoclimate in the South China Sea (SCS). Meanwhile, the geologic significance of paleoclimatic events in the SCS is discussed with global perspectives. The results indicate that the paleo-SSTs reconstructed by the ratios of magnesium to calcium concentrations in the SCS show a general periodic trend of "high-low-high-low" in values changes since the Pliocene. By comparison, the fluctuations of reconstructed paleo-SSTs are much stronger in the Quaternary. Moreover, the variations of the ratios of magnesium to calcium concentrations in the A. radiata skeletons have recorded a series of major paleoclimatic events since the Pliocene, of which the Quaternary glaciation events and the Arctic ice cap forming events during the late Pliocene are more significant. Thus, using the changes of the ratios of magnesium to calcium concentrations in the A. radiata skeletons from Well "Xike-1" reef core to reflect the relative changes of paleo-SSTs is a relatively feasible and reliable way in the SCS, which is also proved by the correlation of drilling cores characteristics in this area. |
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| Keywords: | the ratios of magnesium to calcium concentrations benthonic foraminifera sea surface temperature paleoclimatic events |
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