Sea surface temperature estimates from several sediment cores in the North Atlantic

Here, we have calculated new sea-surface temperature estimates over Dansgaard-Oeschger (DO) events 5-8 (c. 30-40 ka) from 14 sites in the North Atlantic, based on previously published planktic foraminifera relative abundance datasets. These proxy records suggest a large variability in North Atlantic sea-surface temperatures during DO-events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with the planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO-events 5-8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. […]

在本研究中，我们基于先前发表的浮游有孔虫相对丰度数据集，对北大西洋Dansgaard-Oeschger（DO）事件5-8（约30-40千年前）的14个地点进行了新的海面温度估算。这些代理记录表明，在末次冰期的DO事件期间，北大西洋海面温度存在显著变率。然而，由于代理数据的可获得性有限，无法全面展现海洋变化的时空图景。因此，我们将完全耦合的通用环流模型模拟与基于浮游有孔虫海面温度重建相结合，以获取DO事件5-8期间海洋状态的更广泛空间图景。所得的海面温度空间模式与多种不同的通用环流模型和模拟结果相一致。