230TH/234U Dating of Barbados Sea Level Record 0-230,000 Years BP

海平面的历史是 古气候研究。 它定义了冰的历史和速度 增长和融化，大气中最慢的成分 海洋-冰冻圈系统 海平面的最佳记录是 是用年代久远的珊瑚礁材料制成的。 这项建议 请求支持，以完善海平面历史， 125，000年，并校准14 C时标， 四万年。 PI将使用 巴巴多斯珊瑚礁样品及其放射性年龄 将海平面记录延长到距今12.5万年前。 比较 14 C和230 Th年龄之间的珊瑚样本将被用来 校准14 C时标。 这项研究很重要，因为 它将：1）开发最好的海平面记录; 2） 把14 C的时间刻度校准到大约4万年前。 因此 将有可能在同一时间尺度上比较 气候和天文变化的影响 变化

The history of sea level is an important component of paleoclimate research. It defines the history and rate of ice growth and melting, the slowest component of the atmosphere- ocean-cryosphere system. The best record of sea level is produced by using well-dated coral reef material. This proposal requests support to refine the sea level history for the last 125,000 years and to calibrate the 14C time scale for the last 40,000 years. The PIs will use the elevation and morphometry of the coral reef samples from Barbados and their radiometric ages to extend the sea level record to 125,000 years BP. Comparisons between 14C and 230Th ages of coral samples will be used to calibrate the 14C time scale. This research is important because it will: 1) develop the best possible record of sea level and 2) calibrate the 14C time scale back to about 40,000 years BP. Thus it will be possible to compare on the same time scale the records of climate and the astronomical variations which cause climate change.