冷水柳珊瑚骨骼化石重建的早全新世南海中层水十年际变化

卜鸣渊, 曾治惟, 易亮, 周晓理, 党皓文, 翦知湣. 冷水柳珊瑚骨骼化石重建的早全新世南海中层水十年际变化[J]. 第四纪研究, 2023, 43(1): 74-82. doi: 10.11928/j.issn.1001-7410.2023.01.06
引用本文: 卜鸣渊, 曾治惟, 易亮, 周晓理, 党皓文, 翦知湣. 冷水柳珊瑚骨骼化石重建的早全新世南海中层水十年际变化[J]. 第四纪研究, 2023, 43(1): 74-82. doi: 10.11928/j.issn.1001-7410.2023.01.06
卜鸣渊, 曾治惟, 易亮, 周晓理, 党皓文, 翦知湣. 冷水柳珊瑚骨骼化石重建的早全新世南海中层水十年际变化[J]. 第四纪研究, 2023, 43(1): 74-82. doi: 10.11928/j.issn.1001-7410.2023.01.06 BU Mingyuan, ZENG Zhiwei, YI Liang, ZHOU Xiaoli, DANG Haowen, JIAN Zhimin. Interdecadal variation of intermediate water in the South China Sea reconstructed by cold-water gorgonian skeleton fossils during the Early Holocene[J]. Quaternary Sciences, 2023, 43(1): 74-82. doi: 10.11928/j.issn.1001-7410.2023.01.06
Citation: BU Mingyuan, ZENG Zhiwei, YI Liang, ZHOU Xiaoli, DANG Haowen, JIAN Zhimin. Interdecadal variation of intermediate water in the South China Sea reconstructed by cold-water gorgonian skeleton fossils during the Early Holocene[J]. Quaternary Sciences, 2023, 43(1): 74-82. doi: 10.11928/j.issn.1001-7410.2023.01.06

冷水柳珊瑚骨骼化石重建的早全新世南海中层水十年际变化

  • 基金项目:

    上海市科委项目(批准号: 21NL2600203和21ZR1464800)、国家自然科学基金项目(批准号: 42188102和91958208)和科技部重点研发计划项目(批准号: 2021YFF0502500)共同资助

详细信息

Interdecadal variation of intermediate water in the South China Sea reconstructed by cold-water gorgonian skeleton fossils during the Early Holocene

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  • 冷水珊瑚可以提供其生长期内周围环境变化的信息, 有望填补中-深层海洋高分辨率重建材料的空缺。本文利用“深海勇士”号载人深潜器在甘泉海台西南角海山上(16.55°W, 110.89°E; 水深1119.3m)采集的柳珊瑚样品(SY185-9)开展探索性研究, 检验冷水珊瑚高分辨率古环境重建的应用价值。X射线衍射(XRD)分析结果表明SY185-9的矿物成分主要为镁方解石(Mg0.06Ca0.94CO3); 骨骼横切面的14C测年结果显示SY185-9生长于早全新世, 时间跨度为9621±135~8922±114a B.P.; 利用环境扫描电子显微镜结合能谱仪和电子探针, 分析SY185-9骨骼横切面的元素组成和变化, 其中Mg/Ca比值指示了SY185-9生长时期平均海水温度为4.7±0.9℃, 较现代相同位置处的平均海水温度高约0.9℃, 可能反映早全新世南海中层水温度较现代略高的特征, 但也需注意冷水珊瑚Mg/Ca温度计算公式的区域适用性和珊瑚生命效应问题; Mg/Ca记录的频谱分析结果揭示显著的十年-百年际尺度波动, 可能反映中层水温度的自然变率, 或因局地海山地形而造成的中层海水与海表气候之间的密切联系。

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  • 图 1 

    样品采集位置示意图与SY185-9样品照片

    Figure 1. 

    Schematic diagram of sample collection location and photos of SY185-9.

    图 2 

    SY185-9的显微结构与矿物组成

    Figure 2. 

    Microstructure and mineral composition of SY185-9.Microstructure and mineral composition of SY185-9.

    图 3 

    SY185-9年龄序列与元素浓度变化

    Figure 3. 

    Time series and changes in elemental concentrations of SY185-9

    图 4 

    古海水温度重建结果与同时期相关记录对比

    Figure 4. 

    Comparison between the reconstructed results of paleo-seawater temperature and related records of the same period.

    图 5 

    SY185-9频谱分析与滤波结果

    Figure 5. 

    Spectrum analysis and filtering results of SY185-9

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出版历程
收稿日期:  2022-08-29
修回日期:  2022-11-02
刊出日期:  2023-01-30

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