Reconstruction of the Eustatic Sea Level Curve 15,000 to 5,000 Years Before Present

重建距今 15,000 至 5,000 年前的海平面上升曲线

• 批准号: 8717172
• 负责人: Richard Fairbanks
• 金额: --
• 依托单位: Columbia University Lamont Doherty Earth Observatory
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1991-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8717172&HistoricalAwards=false
• 关键词: Reconstruction; Eustatic; Sea; Level; Curve

The project involves a field program to take drill cores on the flank of Barbados in order to recover coral samples deposited during the most recent rise of sealevel. The coral species to be used in the study only grows within 5 meters of sealevel. By accurately determining the age of the coral recovered and the depth where it is found, a sealevel curve for the last 15,000 years will be constructed. This sealevel curve will be the first accurate curve of the most recent sealevel rise which has been estimated to be from 75 to 160 meters since the last ice age. The results will applied to a long-standing problem in paleoceanography: how to separate ice volume (sealevel) from temperature on the oxygen isotope signal in deep sea cores. Once the magnitude and timing of the sealevel rise is solved, the temperature signal may be extracted from isotope records.

该项目涉及一项在巴巴多斯侧翼采集钻芯的实地计划，以回收最近海平面上升期间沉积的珊瑚样本。研究中使用的珊瑚物种仅生长在海平面 5 米范围内。通过准确确定回收的珊瑚的年龄和发现珊瑚的深度，将构建出过去 15,000 年的海平面曲线。这条海平面曲线将是最近海平面上升的第一条准确曲线，自上一个冰河时代以来，海平面上升估计为 75 米至 160 米。研究结果将应用于古海洋学中长期存在的问题：如何将深海核心氧同位素信号中的冰量（海平面）与温度分开。一旦解决了海平面上升的幅度和时间，就可以从同位素记录中提取温度信号。