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为了确定控制末次冰消期的机制以及引起冰消期事件的顺序 ,最重要的是获得应用于大陆和海洋两者的气候记录的时间结构。放射性碳测年已经广泛应用于海洋沉积物的日历测年 ,但它是建立在表层水的表观年龄（相对于大气层来说）保持不变的假设上的。这里我们提出了北大西洋４０°
In order to determine the mechanisms used to control the last ice fall and the sequence that led to the ice fall events, it is of paramount importance to obtain the temporal structure of climate records applied to both the mainland and the oceans. Radiocarbon dating has been widely used for calendar dating of marine sediments, but it is based on the assumption that apparent water surface age (relative to the atmosphere) remains constant. Here we present the North Atlantic 40 °