Pleistocene Sea Level Reconstruction

化石珊瑚的U/Th定年提供了评估晚更新世期间过去海平面波动的时间和变化率所需的基本时间尺度。作为该项目的一部分进行的研究挑战了开放系统定年技术的使用，并建议使用新型显微筛选和激光烧蚀技术进行精细采样，在化石棕榈Acropora珊瑚中定位封闭系统文石。精细尺度分析将试图更好地理解在化石珊瑚标本中观察到的U、Th和Pa的非均质性的大小和可能的原因。该项目还将对化石珊瑚进行采样，利用来自Araki岛和巴巴多斯的材料，重建MIS 3期间的海平面变化，并利用PI先前收集的大量化石珊瑚档案，探索海洋同位素阶段5的海平面估计。

U/Th dating of fossil corals provides the fundamental timescale needed to evaluate the timing and rates of change of past sea level fluctuations during the Late Pleistocene. Research conducted as part of this project challenges the use of open system dating techniques and proposes to locate closed system aragonite in fossil Acropora palmata corals using novel microscopic screening and laser ablation techniques for fine-scale sampling. Fine scale analyses will attempt to better understand the magnitude and possible causes for the heterogeneities of U, Th and Pa observed within fossil coral specimens. The project will also sample fossil corals to reconstruct sea level variability during MIS 3 using material from Araki Island and Barbados, as well as to explore marine isotope stage 5 sea level estimates using the extensive archive of fossil corals that was previously collected by the PI.