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| 1 | 海南东部小海潟湖沉积物地球化学特征及对古台风活动的指示显示文摘为探讨海南东部历史时期的气候环境变化,2015年于海南岛东海岸小海潟湖中采集了一根长73 cm的柱状样(XH15-02),在年代学(210Pb和AMS14C)测试的基础上,开展了多环境代用指标(总有机碳(TOC)、总氮(TN)、有机碳稳定同位素、干密度等)的测试和分析.结果表明,XH15-02柱状样TOC与TN含量有很好的相关性,C/N比值在10.41~23.33之间变化,有机碳稳定同位素(δ13Corg)值在-25.14‰^-23.29‰之间.通过对多气候环境代用指标的分析,以及与历史文献资料和其他自然代用指标的综合比对,认为XH15-02孔岩芯沉积记录了研究区过去1100多年来较为丰富的气候环境、台风活动以及人类活动影响等信息.近千年来,小海潟湖沉积有机物主要以陆源输入为主,据估算该岩芯有机碳陆生来源约占47.00%~73.43%,但在不同时期变化幅度较大,该陆源有机碳含量变化可能主要反映了历史时期海南东部地区的干湿变化历史;自1850年以来,XH15-02孔岩芯沉积通量的显著增加与当地人口的快速增长历史一致,反映了研究区近二百年来可能受到的人类对自然界的开发活动影响强烈;多个具有显著偏正δ13Corg记录的时期同史料记载以及周边区域地质记录中的'大风'、'海溢'、'风暴'等事件发生时间较为相近,可能揭示了历史时期的台风或高海平面事件,进而认为小海潟湖沉积在重建历史时期海南地区台风活动等方面具有很大潜力. | 游爱华 薛积彬 谢露华 程嵘 魏志强 钟巍 | 2019 | 湖泊科学2019，31，6： | 3 |
| 2 | Tracking historical storm records from high-barrier lagoon deposits on the southeastern coast of Hainan Island,China显示文摘The relationship between storm activity and global warming remains uncertain.To better understand storm–climate relationships,coastal lagoon deposits are increasingly being investigated because they could provide high-resolution storm records long enough to cover past climate changes.However,site-specific sediment dynamics and high barriers may bias storm reconstructions.Here,we aimed to investigate these factors through the reconstruction of five distinct storm records(XCL-01,XC-03,XC-06,XC-07,XC-08)from different water depths in a lagoon with a high barrier(i.e.,Xincun Lagoon of Hainan Island).Sediment cores were characterized using high-resolution grain size and XRF measurements,to identify storm events.These data were coupled with a numerical simulation to obtain bed shear stress data with high-spatial resolution to better understand storm-induced sediment transport mechanisms.^(210) Pb dating and Pb pollution chronostratigraphic markers indicated that the chronology of the storm deposit sequences of the cores span the period between 117 a and 348 a.The grain size and XRF results indicated numerous,highly variable and short-duration fluctuations,suggesting that storm-induced coarse-grained sediments were deposited at these core sites.The inconsistent storm events recorded in these cores suggest that these sites have different preservation potentials for storm deposits.However,the consistence between storm sediment records and historical documents for Core XCL-01 indicates that high-barrier lagoons could provide long-term storm event records with high preservation potential. | Liang Zhou Xiaomei Xu Yaping Wang Jianjun Jia Yang Yang Gaocong Li Changliang Tong Shu Gao | 2021 | Acta Oceanologica Sinica2021，40，11： | 0 |
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