Coastal SEES (Track I), Collaborative: Sediment Supply in a Regime of Accelerated Coastal Erosion (SedS-RACE): Paleo-Perspectives, Anthropogenic Influences and Future Challenges

沿海 SEES（第一轨），协作：海岸加速侵蚀状态下的沉积物供应 (SedS-RACE)：古视角、人为影响和未来挑战

• 批准号: 1325366
• 负责人: Peter Rosen
• 金额: $ 4.31万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1325366&HistoricalAwards=false
• 关键词: Coastal; SEES; Track; Collaborative; Sediment

Coastal SEES (Track I), Collaborative: Sediment Supply in a Regime of Accelerated Coastal Erosion (SedS-RACE): Paleo-Perspectives, Anthropogenic Influences and Future ChallengesChristopher Hein, College of William and Mary Virginia Institute of Marine ScienceElizabeth Canuel, College of William and Mary Virginia Institute of Marine SciencePeter Rosen, Northeastern UniversityJu-Chin Huang, University of New HampshireCoastal retreat and sediment supply have tremendous impacts on society, infrastructure and the ecological functioning of coastal marine ecosystems. These processes are also integral to a range of coastal policy issues since a large fraction of the world?s population lives within 150 km of a coastline and the supply of riverine sediment to coastal regions is decreasing globally. This project addresses fundamental social- and natural- science questions surrounding coastal erosion that arise in response to insufficient supplies of sediment in a regime of accelerated sea-level rise and enhanced storminess. This will be accomplished through an integrative investigation of the long-term sediment sources, anthropogenic modifications and management strategies for a sandy barrier coast that is currently undergoing both severe erosion and intense human development. The focus of this study is the Merrimack River / Plum Island (Massachusetts) barrier system. Both have undergone wide-ranging human alterations that, combined with complex climate-change impacts, have dramatically reduced fluxes of sediment from both fluvial and near-shore sources. Results for the coastal community have been devastating, with consequences that affect human populations on annual, decadal and centennial timescales. This study will evaluate the relationship between the long-term (millennial-scale) record of sediment from the Merrimack River and the stability of Plum Island through the development of an 8000-year record of organic-biomarker proxies to quantify relative changes in the contributions of fluvial and shelf sources of sediment through time. It will then employ historical records and datasets, the correlation of 60 years of coastal-process and shoreline-mapping studies along Plum Island, and the development of down-core geochemical proxy records of anthropogenic impacts on fluvial sediment delivery to the coast, to detail the history of human modifications and evidence of geological responses. Modern shoreline-erosion studies (e.g., shoreline mapping, beach profiling, sediment sampling) will be used to monitor the short-term (1-2 yrs.) impacts of specific erosional events (storms) and management strategies. This combined knowledge will then be used to determine the nature and degree to which humans have altered natural sediment supplies and transport pathways and develop feasible sustainable paths for management that balance natural processes, societal needs and constraints, and communities? monetary and non-monetary valuation of the river, barrier and associated ecosystems.A unique product of this study will be the development of a 53-min PBS-style documentary that will provide a transparent view into the complex social and scientific interactions which inform the collective decision-making process around coastal erosion. A detailed distribution and impact-assessment plan for this film will allow it to serve as a unique and broadly-impactful education and outreach tool. Additional outreach will include the incorporation of local students and community members in beach monitoring efforts, coordinated policy development with local towns, public lectures, and the development of a display at a local National Wildlife Refuge that will focus on coupled human-natural interactions in relation to the coastal erosion problem on Plum Island. Additionally, it will provide interdisciplinary training for five students (1 PhD, 1 MSc, 3 undergraduate) both within and across the natural and social sciences, and will support an early-career scientist.

沿海地区（曲目I），合作：在加速沿海侵蚀（SEDS-Race）方面的沉积物供应：古探测，人为影响和未来的挑战，威廉和玛丽·弗吉尼亚州玛丽·弗吉尼亚州海洋学科学学院威廉和玛丽·玛丽·玛丽·玛丽·弗吉尼亚州科学院，北科学学院 - 诺斯科学院，海上科学院，北部科学院汉普河流恢复和沉积物供应对沿海海洋生态系统的社会，基础设施和生态功能产生了巨大影响。这些过程也是一系列沿海政策问题不可或缺的一部分，因为世界上很大一部分人口居住在海岸线的150公里以内，河流沉积物向沿海地区的供应在全球范围内正在减少。该项目解决了围绕沿海侵蚀的基本社会和自然科学问题，这些问题是响应在加速的海平面上升和增强的暴风雨中供应不足的沉积物供应而产生的。这将通过对长期沉积物来源，人为修改和管理屏蔽层海岸的管理策略进行整合研究来实现，该策略目前正在遭受严重的侵蚀和强烈的人类发展。这项研究的重点是Merrimack河 /梅花岛（马萨诸塞州）屏障系统。两者都经历了广泛的人类改变，结合复杂的气候变化影响，从河流和近岸来源大大减少了沉积物的通量。沿海社区的结果一直是毁灭性的，后果影响了人口年度，年百年纪念和百年纪念时间尺度。这项研究将评估Merrimack河的长期（千禧年尺度）记录的关系与梅里马克河的稳定性，通过发展为8000年的有机生物标志物代理记录，以量化量化沉积物源和货架源的相对变化的相对变化。然后，它将采用历史记录和数据集，沿着梅花岛沿线的60年沿海化和海岸线图研究的相关性，以及在河流沉积物向沿海河流沉积物传递的人为影响的核心地球化学代理记录的发展，以详细详细介绍人类修改的历史和地质响应的证据。现代海岸线渗透研究（例如，海岸线映射，海滩分析，沉积物采样）将用于监测特定侵蚀事件（风暴）和管理策略的短期（1 - 2年）影响。然后，这种合并的知识将用于确定人类改变自然沉积物供应和运输途径的性质和程度，并为管理的可行可持续发展途径，以平衡自然过程，社会需求和约束以及社区？河流，障碍物和相关生态系统的货币和非货币估值。这项研究的独特产品将是开发53分钟的PBS式纪录片，该纪录片将为复杂的社会和科学互动提供透明的看法，该互动为围绕沿海侵蚀的集体决策过程提供了透明度。这部电影的详细发行和影响评估计划将使其成为一种独特而广泛的教育和外展工具。额外的宣传将包括将当地学生和社区成员纳入海滩监测工作，与当地城镇的政策制定，公共讲座以及在当地国家野生动物保护区的展览中开发，该避难所将重点介绍与梅花岛上沿海侵蚀问题有关的人类自然互动。此外，它将为自然和社会科学内部和整个社会科学的五名学生（1博士学位，1位MSC，3个本科生）提供跨学科的培训，并将支持一位早期职业科学家。