Sea Level Record of the Last Glacial Period 19,000 to 29,000 years BP

这项研究将允许PI继续寻找巴巴多斯的A. palmata珊瑚物种，以澄清海平面曲线和相关古气候记录的各个方面。PI将钻探和恢复生长在末次盛冰期海平面低点的珊瑚化石。他已经确定了一个淹没礁群，根据其水深对应于低水位，因此代表了低水位期间的珊瑚礁生长。从这个珊瑚礁群中测定珊瑚的年代是确定这一点的唯一方法，但如果成功，它将代表一个非常重要的数据集。复合体上的礁尖可能提供了LGM低水位上升至~90 m水深的海平面上升记录，从而在确定低水位何时结束、是否突然结束以及随后的海平面历史直到融水脉冲1A时间方面填补了重要的细节。PI将使用从RV Knorr部署的电缆取心设备收集珊瑚骨骼材料的岩心。他将对收集到的珊瑚材料进行最初的u系列测年，以确定收集到的样本的年龄范围。更广泛的影响包括在真正的LGM期间精确重建海平面和支持本科生/研究生研究培训计划。

0550900FairbanksAbstractThe study will allow the PI to continue his search for coral species A. palmata from Barbados to clarify various aspects of the sea level curve and associated paleoclimate records. The PI will drill and recover fossil corals that grew during the sea-level lowstand of the Last Glacial Maximum. He has identified a drowned reef complex that, based on its water depth would correspond to the lowstand, and thus represent reef growth during lowstand. Dating corals from this reef complex is the only way to ascertain this but if successful it will represent an exceptionally important dataset. Reef pinnacles on the complex may provide a record of sea level rise following the LGM lowstand up to ~90 m water depth, and thus fill in an important detail with respect to determining when the lowstand ended, whether it ended abruptly or not, and subsequent sea-level history up to the time of meltwater pulse 1A. The PI will use a wireline coring device deployed from the RV Knorr to collect cores of coral skeletal material. He will do initial U-series dating of collected coral material to determine the range of ages of the samples collected. The broader impacts include an accurate reconstruction of sea-level during the true LGM and support of an undergraduate/graduate research training program.