Reconstructing sea surface　temperature,sea surface salinity and partial pressure of carbon dioxide in atmosphere in the Okinawa Trough during the Holocene and their　paleoclimatic implications

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• 作者：MENG Xianwei（孟宪伟）；LIU Yanguang（刘焱光）；LIU Zhenxia（刘振夏）；DU Dewen（杜德文）；HUANG Qiyu（黄奇瑜）；Saito，Y
• 单位1：Key Laboratory of Marine Sedimentology and Environmental Geologoy,State Oceanic Administration；First Institute of Oceanography,State Oceanic Administration
• 语种：英文
• 作者关键词：Okinawa Trough；Holocene；cooling event；partial pressure of carbon dioxide in the at-mosphere
• 起始页：82
• 总页数：7
• 经费资助：中韩黄海沉积动力学与古环境演变研究项目和国家海洋局青年海洋科学基金资助项目（编号：97401号）联合资助 This work was supported by the National Natural Science Faundation of China (Grant No.49706068)
• 刊名：海注沉积与环境地质国家海洋局重点实验室研究年报
• 是否内版：否
• 主编：石学法；孟宪伟；刘保华
• 期刊索取号：P371.0691672003-2004

摘要

The sediment core DGKS9603 collected from the Okinawa Trough was used as research tar-get.By use of unsaturated index U₃₇k of long-chain alkenone, δ¹³C of POC of planktonic foraminifera(G.Sacculifer),the evolutions of sea surface temperature and partial pressure of carbon dioxide inthe atmosphere during the Holocene were reconstructed in the Okinawa Trough. And in combination ofδ¹⁸O 0f planktonic foraminifera,the relative difference of sea surface salinity during the Holocene wasalso reconstructed.Consequently,three cooling events(E₁～E₃) were identified,each of which oc-curred at 1.7～1.6, 5.1|～4.8 and 8.1～7.4kaBP(cal),respectively.Of the three events,E₂ andE₃ are globally comparable,their occurrence mechanism would be that the main stream of the KuroshioCurrent shifted eastward due to the enhanced circulation of the northeastern Pacific Ocean,which wasdriven in turn by amplified intensity of sunshine and subsequent enhancement of subtropical high pres-sure；E₁ corresponds to the Small Ice-Age Event occurred between 1550 and 1850AD in China.In theOkinawa Trough,E₁ might be also related to the eastward shift of main stream of the Kuroshio currentdriven by powerful Asia winter monsoon.