Hurricane Isaac Storm Surge Sedimentation

飓风期间沉积的沉积物是一个很少研究，但可能是长期沿海沼泽加积的重要贡献者。需要对现代飓风风暴潮沉积物进行研究，以量化飓风对长期沼泽沉积速率的影响，并为史前飓风沉积物的解释提供信息。这个快速反应项目将利用最近与2012年8月影响美国墨西哥湾沿岸的1级飓风艾萨克有关的风暴潮沉积物。将在距飓风登陆地点不同的风暴潮沉积地点建立取样断面。将对沿着断面的开挖坑进行地层描述和取样，以确定风暴潮沉积物的规模、分布和特征。为了将沉积物置于长期沼泽沉积速率的背景下，将使用铯-137对底层沉积物进行增量测年。一年后将重新访问断面，以确定沉积物并入沼泽的特征。该项目将建立在主要研究者最近进行的相关NSF资助的研究的基础上。这项研究的结果将有助于解释沉积记录中的飓风沉积物，这将大大有助于评估飓风复发间隔、飓风活动的长期趋势以及对沿海居民的相关风险。一个研究生的潜在参与将包括在采样和分析，演示和结果的出版培训，并纳入硕士研究？的论文。

Sediment deposited during hurricanes is a little-studied but potentially important contributor to long-term coastal marsh aggradation. Studies of modern hurricane storm surge deposits are needed to quantify the impact of hurricanes on long-term marsh sedimentation rates, and to inform interpretations of prehistoric hurricane deposits. This Rapid Response project will make use of recent storm surge deposits associated with Hurricane Isaac, a Category 1 storm that impacted the U.S. Gulf Coast in August 2012. Sampling transects will be established at sites of storm surge sedimentation that vary in distance from the hurricane landfall location. Excavation pits along transects will be stratigraphically described and sampled to determine the magnitude, distribution, and characteristics of the storm surge deposits. To place the deposits in the context of long-term marsh sedimentation rates, underlying sediments will be dated in increments using Cesium-137. Transects will be revisited after a year to characterize the incorporation of the deposits into the marsh. The project will build upon related NSF-funded studies recently conducted by the principal investigator. Results of this research will aid interpretations of hurricane deposits in the sedimentary record, which contribute significantly to assessments of hurricane recurrence intervals, long-term trends in hurricane activity, and associated risk to coastal inhabitants. The potential involvement of a graduate student will include training in sampling and analysis, presentation and publication of results, and incorporation of the research into a Master?s thesis.