Age determination of sediment cores from the Skagerrak

Paleoceanographic and paleoenvironmental interpretations based on foraminifera, sedimentary data, radiocarbon dates, and stable isotope measurements were derived from two sections in the Skagerrak: a 115-m-thick Holocene marine section drilled onshore at Skagen near the northernmost tip of Jutland, Denmark, and a 9-m piston core from the Skagerrak, north of Skagen. The foraminiferal data show that arctic-subarctic environments in the deep Skagerrak-Kattegat area were succeeded by boreal conditions at 9.6 ka. This was a result of northward migration of the Atlantic polar front and inflow of warm Atlantic water into the area through the Norwegian Channel. A gradual warming of the water masses after 9.6 ka is indicated by the data. Rare foraminifera and high sedimentation rates are found between approximately 8.6 ka and 7.6 ka at both core locations. […]

基于有孔虫、沉积物数据、放射性碳测年以及稳定同位素测量的古海洋学及古环境解释，源于斯卡格拉克海域的两个剖面：一个位于丹麦日德兰半岛最北端斯卡根近岸的115米厚的全新世海洋剖面，以及来自斯卡根北部的斯卡格拉克海域的9米长活塞岩心。有孔虫数据显示，在斯卡格拉克-卡特加特深水区的北极亚北极环境在9.6千年前被温带条件所取代。这归因于大西洋极锋的北移以及通过挪威海峡进入该区域的温暖大西洋水的流入。数据显示，9.6千年前之后，水体逐渐变暖。在约8.6千年前至7.6千年前，在两个岩心位置均发现了稀有有孔虫和较高的沉积速率。