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

海平面历史是古气候研究的重要组成部分。它定义了冰增长和融化的历史和速度，冰增长和融化是大气-海洋-冰冻圈系统中最慢的组成部分。最好的海平面记录是使用年代准确的珊瑚礁材料制作的。该提案要求提供支持，以完善过去125,000年的海平面历史，并校准过去40,000年的14摄氏度时间尺度。和平研究所将使用巴巴多斯珊瑚礁样本的海拔和形态测量及其辐射年龄，将海平面记录延长到125,000年BP。14C和230年代珊瑚样品的比较将被用来校准14C时间刻度。这项研究很重要，因为它将：1)开发尽可能好的海平面记录，2)将14C时间尺度校准回约40,000年BP。因此，可以在相同的时间尺度上比较引起气候变化的气候和天文变化的记录。

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.