The Impact of Episodic Events on Nearshore-Offshore Transport in the Great Lakes (Meterological Modeling Program)

小行星9726679 将根据公告进行研究 机会（NSF 97-38）在大海岸研究 湖泊. 这是一个合作研究项目， 来自10个学术和政府研究机构的调查人员 机构职能体系 该研究正在根据 NSF Coastal Ocean Processes（CoOP） NOAA沿海海洋计划 这项为期5年的合作研究计划将侧重于 事件对近岸-近海的重要性 运输和随后的生态后果。研究 试图1）确定什么过程控制生物的跨界（近岸到离岸）运输， 化学和地质材料在沿海边缘 五大湖，并2）开发和测试科学 评估、量化和预测的战略 自然和人为的多重压力的影响， 在五大湖或选定的沿海次区域。 受污染沉积物与 上覆水通过沉积物再悬浮过程存在于湖泊和沿海生态系统中。卫星 密歇根湖的观测表明， 近岸-近海输送的反复发作，10公里 一股延伸超过200公里的再悬浮物质 沿着湖的南岸。初步证据 表明这一幕式事件可能是 湖泊跨界输沙机制 密歇根 这种类型的事件影响回收利用， 重要地球化学物质（BIMS），生态系统 响应，跨等深线运输在五大湖。的 计划结果将适用于许多类似事件 沿海地区 这一全面的跨学科研究将实施 一个综合的观测程序和数值模拟 努力识别、量化和开发预测工具 冬春季再悬浮事件，并评估 这一事件对运输和转化的影响， BIMS和湖泊生态。 本研究的目的是准确地描述水面风场作为环流输入 密歇根湖识别情景传输的建模 回顾期内发生的事件和两个领域 多年的节目。这项研究将检验这一假设 物质的跨等深线迁移 是对风暴事件的偶发反应 这是在季节性气候变化的关键时期发生的， 的动力学-热力学结构的预处理 湖边

9726679 Roebber Research will be undertaken in response to an Announcement of Opportunity (NSF 97-38)for Coastal Studies in the Great Lakes. This is a collaborative research project between investigators from ten academic and government research institutions. The research is being conducted under the auspices of the NSF Coastal Ocean Processes (CoOP) program and the NOAA Coastal Ocean Program. This collaborative, 5-year research program will focus on the importance of episodic events on nearshore-offshore transport and subsequent ecological consequences. The study seeks to 1) determine what processes control the cross- margin (inshore to offshore) transport of biological, chemical, and geological materials in the coastal margins of the Great Lakes, and to 2) develop and test scientific strategies for assessing, quantifying, and predicting the impacts of multiple stresses both natural and anthropogenic, in the Great Lakes or selected coastal sub-regions. A tight coupling between contaminated sediments and overlying water exists in lakes and coastal ecosystems through the process of sediment resuspension. Satellite observations in Lake Michigan illustrate an annually recurrent episode of nearshore-offshore transport, a 10 km wide plume of resuspended material extending over 200 km along the southern shores of the lake. Preliminary evidence indicates that this episodic event may be the major mechanism for cross-margin sediment transport in Lake Michigan. This type of event impacts recycling of biogeochemically important materials (BIMS), ecosystem responses, cross-isobath transport in the Great Lakes. The program results will be applicable to similar events in many coastal areas. This comprehensive, interdisciplinary study will implement an integrated observational program and numerical modeling effort to identify, quantify, and develop prediction tools for the winter-spring resuspension event and to assess the impact of this event on the transport and transformation of BIMS and on lake ecology. The objective of this research is to accurately describe the overwater wind field to be used as input for circulation modeling of Lake Michigan for identified episodic transport events during the retrospective period and the two field years of the program. The study will test the hypothesis that the generation of cross-isobath transport of material in Lake Michigan is an episodic response to storm events that occur during a critical time brought about by seasonal preconditioning of the dynamic-thermodynamic structure of the lake.