EAR-PF:Reconstructing Western Atlantic Holocene Hurricane Impacts

Davin Wallace博士被授予NSF EAR博士后奖学金，在马萨诸塞大学阿默斯特分校和伍兹霍尔海洋研究所/麻省理工学院进行研究和制定综合教育计划。他将在百慕达岛进行古风暴学研究，调查过去一万年来西大西洋盆地的飓风影响。在现代，历史记录告诉我们，除了百慕大群岛外，大量的大西洋飓风向盆地方向移动，从未在海岸线登陆。以前的古飓风研究已经定位在墨西哥湾、加勒比海和大西洋沿岸，因此，这个地点的增加将有助于了解全新世以来大西洋盆地西部古飓风的总频率。华莱士博士将在几个沿海池塘收集沉积物岩心，并分析它们的粒度变化，因为粗糙的沉积物代表了附近海滩由风暴引起的运输。为了建立这些事件的准确年表，他将使用放射性碳和短寿命同位素分析来分析这些岩心。最后，他将模拟每个事件的古强度以及飓风对过去气候变化的反应。每年，飓风都会影响墨西哥湾、加勒比海和大西洋海岸线。然而，我们只有一个短暂的可靠的飓风影响的历史记录。通过了解古飓风与西大西洋盆地过去已知的气候变化之间的相互作用，我们可以利用这些信息来预测飓风的形成和未来的影响。此外，为西大西洋建立一个长期的飓风记录将有助于弥合现场和基于模型的古气候研究之间的差距，因为模型可以更好地使用额外的数据进行校准。此外，这项工作可以用来解释在更长的地质记录的背景下历史时间的变化。华莱士博士将参加伍兹霍尔海洋研究所海洋资助项目，并为该小组的K-12教育工作者主持几次研讨会。这项外联工作将侧重于与该项目的成果有关的活动和学习方法。他还将参加视频会议，与德克萨斯州的一组科学教师讨论这项工作。

Dr. Davin Wallace has been granted an NSF EAR Postdoctoral Fellowship to conduct research and develop an integrated educational plan at the University of Massachusetts at Amherst and Woods Hole Oceanographic Institution/MIT. He will investigate hurricane impacts over the past 10,000 years in the western Atlantic basin by conducting a paleotempestological study on the island of Bermuda. During modern times, the historic record tells us that a significant amount of Atlantic hurricanes recurve basin ward and never make landfall on coastlines, with the exception of Bermuda. Previous paleohurricane studies have been located along the Gulf of Mexico, Caribbean Sea, and Atlantic Oceans, and the addition of this site would therefore shed light on the total paleohurricane frequency in the western Atlantic Basin over the Holocene. Dr. Wallace will collect sediment cores in several coastal ponds and analyze them for grain size variations, as coarse sediment represents storm-induced transport from nearby beaches. To establish an accurate chronology of these events, he will analyze these cores using radiocarbon and short-lived isotope analyses. Finally, he will model both the paleointensities of each event and the response of hurricanes to past climate variations. Each year, hurricanes annually impact Gulf of Mexico, Caribbean, and Atlantic coastlines. However, we have only a short reliable historical record of hurricane impacts. By understanding the interaction between paleohurricanes and past known climate changes over the western Atlantic Basin, we can use this information to predict hurricane formations and impacts in the future. Also, establishing a long-term hurricane record for the western Atlantic will help bridge the gap between field and modeling based paleoclimate studies, as models become better calibrated with additional data. Further, this work can be used to interpret changes over historic time in the context of a longer geologic record. Dr. Wallace will participate in the Woods Hole Oceanographic Institution Sea Grant program, in addition to leading several workshops for K-12 educators for this group. This outreach effort will focus on activities and learning approaches associated with the results of this project. He will also participate in videoconferences with a group of science teachers in a cohort of teachers from Texas to discuss this work.