Testing the Hypothesis of Eastward Lake Agassiz Discharge at the Beginning of the Younger Dryas using Marine Seismic-Reflection Methods

0623607科尔曼摘要这项工作将产生一个高分辨率的地震地层记录，从上级湖在尼皮贡和雷霆湾地区。前者是为了验证地震地层学证据的主要东流出阿加西湖附近的结束新仙女木。后者是为了确定雷霆湾地区是否存在外流沉积物沉积，这可能是灾难性的向东排放造成的。如果这些沉积物被发现，它们很可能是在最早的新仙女木事件中发现的，因此支持了大量向东的淡水流引发新仙女木冷却的假设。这项工作将影响对气候突变的研究（这对社会利益具有内在的相关性和重要性）和对五大湖海洋科学的研究。还计划就一个既具有科学重要性又对公众感兴趣的专题开展公共宣传。教育推广工作将包括一个网站和与明尼苏达州海洋赠款和其他组织的互动。

0623607ColemanAbstractThe work will produce a high-resolution seismic stratigraphic record from Lake Superior at both the Nipigon and Thunder Bay areas. The former is to verify seismic-stratigraphic evidence of major eastward outflow of Lake Agassiz near the end of the Younger Dryas. The latter is to determine if outflow sediment deposits are present or not in the Thunder Bay area, that might have resulted from catastrophic eastward discharge. If such deposits are identified, these are likely to have been found in the earliest Younger Dryas episode, hence supporting the hypothesis of massive eastward fresh water flow triggering the Younger Dryas cooling. The work will impact studies of abrupt climate change (which is inherently relevant and important to societal interests) and to studies of marine science in the Great lakes. Public outreach is also planned on a topic that is both scientifically important and of interest to the general public. Educational outreach effort will include a website and interactions with Minnesota Sea Grant and other organizations.