Sea surface temperature anomalies in the North Atlantic, 30-40ka, from the proxy surrogate reconstruction method

Here we establish a spatio-temporal evolution of the sea-surface temperature anomalies in the North Atlantic over Dansgaard Oeschger (DO) events 5-8 (30-40ka) using the proxy surrogate reconstruction method. We combine fully coupled, general circulation model simulations with planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO-events 5-8. Here, the model simulations consists of 10 simulations with HadCM3, 8 runs without freshwater forcing and 2 runs with freshwater forcing. These simulations were run by Paul J. Valdes, Joy S. Singarayer and William H.G. Roberts. A description of the simulations can be found in Singarayer and Valdes (2010). All model simulations were run using the University of Bristol's ACRC facilities, (www.acrc.bris.ac.uk). This is the first time the proxy surrogate reconstruction method has been applied to oceanic variability during MIS3. […]

本研究通过运用代理替代重建方法，构建了北太平洋海面温度异常在丹斯加德-奥谢格（DO）事件5-8（约30-40千年前）的空间-时间演化模型。我们融合了完全耦合的全球环流模型模拟以及基于有孔虫的海面温度重建，以描绘出DO事件5-8期间海洋状态的更广阔空间图景。模型模拟包括10次使用HadCM3的模拟，其中8次未施加淡水强迫，2次施加淡水强迫，这些模拟由Paul J. Valdes、Joy S. Singarayer和William H.G. Roberts执行。相关模拟的描述可参考Singarayer和Valdes（2010）的研究。所有模型模拟均在布里斯托尔大学的ACRC设施上运行，（www.acrc.bris.ac.uk）。这是首次将代理替代重建方法应用于MIS3期间的海洋变化研究。