Sea Level Record: Applications to Global Climate

该奖项支持对珊瑚礁进行近海取芯， 巴巴多斯将检索过去详细的海平面记录 两万年 珊瑚礁顶珊瑚的铀系年代测定表明 当时海平面比现在低120米左右 在最后一次盛冰期。 海平面上升不是单调的; 而是以一系列海平面上升率的跳跃为标志 每年至少有三次上升超过2厘米， 冰消作用 冰川融水与海平面的高度相关 上升清楚地记录在氧同位素记录中， 浮游有孔虫 就在这次海平面上升之前 是北大西洋深水生产的开始， 相关的热传导。 同一珊瑚的C-14和U-系列年龄测量 样品，也将提供一个独特的机会，以校准C- 14个时间尺度超过了10,000年的树木年代学。 的 超过10，000年的放射性碳校准对气候至关重要 一项将放射性碳年代测定的替代物与绝对值进行比较的研究， 基于年度层计数的年表，例如冰芯 记录或天文计算。 这些结果立即 对气候和地球物理模型的影响， 气候变化的相位滞后或速率 放射性碳记录

This award supports offshore coring into the coral reefs of Barbados to retrieve a detailed sea level record for the past 20,000 years. U-series dating of the reef crest coral indicates that sea level was approximately 120 meters below present sea level during the last glacial maximum. Sea level rise was not monotonic; rather, it was marked by a series of jumps with rates of sea level rise exceeding 2cm per year at least three times during the deglaciation. The glacial meltwater associated with this sea level rise is clearly recorded in the oxygen isotopic records of planktonic foraminifera. Immediately preceding this sea level jump was the initiation of North Atlantic Deep Water production and associated meridional heat transport. Measurement of C-14 and U-Series ages on the same coral samples, will also provide a unique opportunity to calibrate the C- 14 time scale beyond the 10,000 year dendrochronology. The radiocarbon calibration beyond 10,000 years is critical for climate research that compares radiocarbon-dated proxies with absolute chronologies based on annual layer counting, such as ice core records or astronomical calculation. These results have immediate implications for climate and geophysical models that incorporate phase lags or rates of climate change based on calibrated radiocarbon records.