The Last Deglaciation of the Southeastern Sector of the Scandinavian Ice Sheet
The Last Deglaciation of the Southeastern Sector of the Scandinavian Ice Sheet
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作者：
斯堪的纳维亚冰盖（SIS）是末次冰期全球冰盖系统的重要组成部分，但其增长到最大程度或从最大程度退缩的时间仍然鲜为人知。我们使用了115个宇宙起源的铍-10年龄和70个放射性碳年龄来限制SIS在25,000到12,000年前的三次实质性冰缘波动的时间。最初冰川消融的年代表明，SIS可能导致了全球海平面的突然上升。随后的冰缘波动确定了对北大西洋气候变化的相反的物质平衡响应，表明不同的冰盖对平均气候状态的敏感性不同。
The Scandinavian Ice Sheet (SIS) was an important component of the global ice sheet system during the last glaciation, but the timing of its growth to or retreat from its maximum extent remains poorly known. We used 115 cosmogenic beryllium-10 ages and 70 radiocarbon ages to constrain the timing of three substantial ice-margin fluctuations of the SIS between 25,000 and 12,000 years before the present. The age of initial deglaciation indicates that the SIS may have contributed to an abrupt rise in global sea level. Subsequent ice-margin fluctuations identify opposite mass-balance responses to North Atlantic climate change, indicating differing ice-sheet sensitivities to mean climate state.