Deglaciation patterns of the Scandinavian Ice Sheet in the Salpausselkä zone, southern Finland were studied. Digital elevation models (DEM/LiDAR‐imageries) were used to map and categorize glacifluvial formations of the study area, and evidence for ice re‐advance and retreat phases and their extent across the Younger Dryas Salpausselkä zone was collected. The results suggest that the Finnish Lake District Ice Lobe, located in SE Finland, retreated a minimum of 60 km north of the proximal side of the present First Salpausselkä ridge prior to the Younger Dryas, most probably during the Allerød interstadial (c. 13 900–12 700 years ago). This retreat phase was followed by a re‐advance after which the First Salpausselkä was formed (maximum age 13 300±900 years ago) in front of the Finnish Lake District Ice Lobe’s ice margin. Subsequently, ice retreated further north and the Second Salpausselkä in front of the Finnish Lake District Ice Lobe margin was formed, according to OSL‐age determinations between 11 500 and 12 000 years ago. Previous research indicates that a similar retreat and re‐advance event to that of the Finnish Lake District Ice Lobe did not take place in the area covered by the Baltic Sea Ice Lobe to the southwest. Overall, the results suggest that the ice retreat of the Finnish Lake District Ice Lobe was of the same magnitude as the contemporary Allerød interstadial ice retreat event along the western flank of the Scandinavian Ice Sheet in Norway and minor ice‐sheet oscillations in central Sweden.

中文翻译：

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芬兰南部Salpausselkä区斯堪的纳维亚冰原的冰消动力学

研究了芬兰南部萨尔帕苏卡地区的斯堪的纳维亚冰盖的冰消模式。使用数字高程模型（DEM / LiDAR图像）对研究区域的冰川河流层进行了制图和分类，并收集了在年轻得里亚斯-萨尔帕苏卡地区的冰前移和后退阶段及其范围的证据。结果表明，位于芬兰东南部的芬兰湖区冰原在较年轻的德里亚斯之前，在目前的第一萨尔帕苏卡克山脊近侧以北至少60公里处退缩，最有可能是在阿勒洛德陆缘交汇期（c。13 900–12 700年前）。在此撤退阶段之后，进行了重新推进，之后在芬兰湖区冰层的冰缘前形成了第一条萨尔帕苏卡（Salpausselkä）（最大年龄13 300±900年前）。随后，根据OSL年龄在11500到12000年前的确定，冰向北退去，并在芬兰湖区冰瓣边缘的前面形成了第二Salpausselkä。先前的研究表明，西南波罗的海冰瓣所覆盖的区域没有发生与芬兰湖区冰瓣类似的后退和推进事件。全面的，