EAR-PF:Reconstructing Western Atlantic Holocene Hurricane Impacts

EAR-PF：重建西大西洋全新世飓风影响

• 批准号: 1144869
• 负责人: Davin Wallace
• 金额: $ 8.5万
• 依托单位: Wallace Davin J
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1144869&HistoricalAwards=false
• 关键词: EAR; PF; Reconstructing; Western; Atlantic

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.

Davin Wallace 博士已获得 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并制定综合教育计划。他将通过在百慕大岛进行古风暴学研究，调查过去一万年的飓风对西大西洋盆地的影响。在现代，历史记录告诉我们，大量大西洋飓风在盆地内弯曲，从未在海岸线上登陆，百慕大除外。之前的古飓风研究都位于墨西哥湾、加勒比海和大西洋沿岸，因此增加该地点将有助于了解全新世西大西洋盆地的总古飓风频率。华莱士博士将收集几个沿海池塘的沉积物核心，并分析它们的颗粒尺寸变化，因为粗沉积物代表风暴引起的来自附近海滩的运输。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，他将对每个事件的古强度以及飓风对过去气候变化的响应进行建模。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，我们只有简短可靠的飓风影响历史记录。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未来的飓风形成和影响。此外，建立西大西洋的长期飓风记录将有助于弥合基于实地和基于模型的古气候研究之间的差距，因为模型可以通过附加数据更好地校准。此外，这项工作可用于解释较长地质记录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的海洋资助计划，此外还将为该小组的 K-12 教育工作者主持多个研讨会。这项外展工作将重点关注与该项目结果相关的活动和学习方法。他还将参加与来自德克萨斯州的一组科学教师的视频会议，讨论这项工作。