Ice Volume and Sea Level During the Last Interglacial
Ice Volume and Sea Level During the Last Interglacial
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DOI：
10.1126/science.1205749
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发表时间：
2012-07-13
期刊：
影响因子：
56.9
通讯作者：
Lambeck, K.
中科院分区：
文献类型：
--
作者：
Dutton, A.;Lambeck, K.
在上一次间冰期，与125,000年前类似，海平面至少比现在高出几米，在不同地理位置观察到的峰值海平面有很大的变化。关于西南极冰盖在上一次间冰期崩塌的猜测引起了人们对了解这段时间内的气候和冰盖动力学的特别兴趣。我们提供了一个内部一致的珊瑚U-Th年龄数据库，以在均衡模拟和地层证据的背景下评估最后一次间冰期海平面观测。这些数据表明，全球(最高海平面)海平面达到了比目前海平面高5.5至9米的峰值，这要求格陵兰和南极洲的冰盖比今天更小，这表明海平面对辐射强迫的微小变化非常敏感。
During the last interglacial period, similar to 125,000 years ago, sea level was at least several meters higher than at present, with substantial variability observed for peak sea level at geographically diverse sites. Speculation that the West Antarctic ice sheet collapsed during the last interglacial period has drawn particular interest to understanding climate and ice-sheet dynamics during this time interval. We provide an internally consistent database of coral U-Th ages to assess last interglacial sea-level observations in the context of isostatic modeling and stratigraphic evidence. These data indicate that global (eustatic) sea level peaked 5.5 to 9 meters above present sea level, requiring smaller ice sheets in both Greenland and Antarctica relative to today and indicating strong sea-level sensitivity to small changes in radiative forcing.