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

距今 19,000 至 29,000 年末次冰河期的海平面记录

• 批准号: 0550900
• 负责人: Steven Goldstein
• 金额: --
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-11-15 至 2008-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0550900&HistoricalAwards=false
• 关键词: Sea; Level; Record; Last; Glacial

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.

0550900费尔班克斯摘要这项研究将使PI继续他的珊瑚物种A的搜索。palmata从巴巴多斯澄清海平面曲线和相关的古气候记录的各个方面。PI将钻探和恢复在末次冰盛期海平面低水位期间生长的珊瑚化石。他已经确定了一个淹没的珊瑚礁复合体，根据其水深，它将对应于低水位，因此代表了低水位期间的珊瑚礁生长。从这个珊瑚礁复合体中确定珊瑚的年龄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。复合体上的珊瑚礁尖峰可能提供了一个记录，海平面上升后的末次盛冰期低位高达~90米的水深，从而填补了一个重要的细节，以确定何时结束低位，它是否突然结束或不，以及随后的海平面历史的时间融水脉冲1A。PI将使用从RV Knorr部署的钢丝绳取芯装置收集珊瑚骨骼材料的芯。他将对收集到的珊瑚材料进行初步的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和本科生/研究生研究培训计划的支持海平面的准确重建。