Collaborative Research: Developing high-resolution records of storminess from the southern Bering Sea

合作研究：开发白令海南部风暴的高分辨率记录

• 批准号: 2040225
• 负责人: Andrea Hawkes
• 金额: $ 43.34万
• 依托单位: University of North Carolina at Wilmington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2040225&HistoricalAwards=false
• 关键词: Collaborative; Research; Developing; resolution; records

Recent storminess combined with decreasing extent and duration of sea ice in the Bering Sea has significantly affected Alaska’s Arctic coastline, substantially disrupting communities, threatening commerce including commercial fishing, and posing new challenges to our military and vital marine transportation systems. Unfortunately, our knowledge of past storminess is limited to the last few decades, so we know little about past variability in extreme storms. This hinders our ability to diagnose the causes of changes in storminess and to plan for and address future storm impacts. With this project we will provide comprehensive storm data sets for the central Aleutian Islands that span the last two millennia, providing important context to current and future storm climates. A research cruise along Alaska’s Aleutian Islands will allow us to access remote fjords and collect a series of sediment cores and environmental measurements that have the potential to decipher the history of ancient storm events impacting the area. These storm reconstructions will improve our understanding of how intense storminess has changed in the Bering Sea and allow examination of the regional environmental factors that enhance or inhibit storm activity. The lessons learned from this research will be useful to the scientific community, planners, and local decision makers and will improve preparedness and resilience to future storm activity and coastal hazards.Because the modern instrumental record of storminess in the Bering Sea is limited, we know little about the variability of intense storminess prior to the last few decades. To address this gap in knowledge we will develop reconstructions of extreme storms over the last few millennia from coarse-grained event beds in deep coastal basins along the north coast of the Aleutians. Using sedimentological, geophysical and numerical modeling techniques, coupled with local instrumentation (wave, current, pressure sensors), and the collection of local oral and written storm narratives we will; 1) develop reconstructions of coarse-grained event beds over several millennia, 2) measure real-time storm-related coastal processes to determine thresholds for event bed deposition and provide National Weather Service data for real-time storm and flood impact forecasting, 3) engage with local communities to develop a chronology of historical storm affects, and 4) differentiate other mechanisms of event bed deposition and develop a record of relative sea-level change and potentially great earthquakes and tsunamis. This research is tightly coupled with a field- and lab-based education plan focused on building coastal science literacy to support informed decision-making. Extreme storms endanger Alaskan Native coastal communities already at risk from increased flooding and erosion and threaten critical infrastructure and access to subsistence resources. A collaboration with the Qawalangin Tribe of Unalaska will serve to build synergy between scientists, local stakeholders, and community residents. Tribal participation in the planning and carrying out of research activities, the production of a professional outreach video/photo blog, and design of a portable educational exhibit and accompanying curriculum materials will provide many opportunities for meaningful engagement and the promotion of STEM fields to under-represented groups. The research will also incorporate undergraduate and graduate students with targeted efforts to increase the representation of Alaska Natives, women, minorities, and people with disabilities in STEM fields. We will widely present to the public and scientific audiences through multiple media and at professional conferences and publications.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

最近的风暴加上白令海的范围和海冰持续时间的减少，严重影响了阿拉斯加的北极海岸线，实质上破坏了社区，威胁着包括商业捕鱼在内的商业，并向我们的军事和重要海洋运输系统提出了新的挑战。不幸的是，我们对过去风暴的了解仅限于过去几十年，因此我们对极端风暴的过去变异性知之甚少。诊断风暴变化的原因，并计划和解决未来的风暴影响。通过这个项目，我们将为跨越最后两千年的中部阿拉特群岛提供全面的风暴数据集，为当前和未来的风暴气候提供重要背景。沿阿拉斯加的阿拉特群岛进行的一项研究巡游将使我们能够进入遥远的博览会，并收集一系列的沉积物核心和环境测量，这些核心有可能破译影响该地区的古代风暴事件的历史。这些风暴的重建将提高我们对白令海暴风雨如何变化的理解，并允许检查增强或抑制风暴活动的区域环境因素。从这项研究中学到的经验教训对科学界，计划者和当地决策者将很有用，并将提高对未来风暴活动和沿海危害的准备和韧性。由于白令海风暴的现代乐器记录有限，因此我们对过去几十年来发生剧烈风暴的变化知之甚少。为了解决这一知识的差距，我们将在过去几千年中从阿留申者北部海岸的深海沿海鲈鱼中的粗粒度活动床开始重建极端风暴的重建。使用沉积学，地球物理和数值建模技术，再加上本地仪器（波，电流，压力）传感器），并收集了当地的口服和书面风暴叙事； 1）在数千年中开发重建粗粒事件床的重建，2）测量与实时风暴相关的沿海过程，以确定事件床沉积的阈值，并为实时风暴和洪水影响预测提供国家气象服务数据，3）与当地社区互动，与当地社区互动以发展历史风暴的年代学，并在巨大的地球上发展，并区分事件床位的其他机制和4）区分，4）区分事件的依据，并区分了事件床位的其他机制 - 海啸。这项研究与一项旨在建立沿海科学素养的基于现场和实验室的教育计划紧密相结合，以支持明智的决策。极端的风暴危害阿拉斯加的沿海地区已经受到洪水和侵蚀增加，威胁着关键基础设施并获得生存资源的风险。与UNALASKA的卡瓦兰汀部落的合作将有助于在科学家，当地利益相关者和社区居民之间建立协同作用。部落参与计划和进行研究活动，专业外展视频/照片博客的生产以及便携式教育展览和参与课程材料的设计将为有意义的参与和促进STEM领域促进代表性不足的群体提供许多机会。这项研究还将将本科和研究生纳入有针对性的努力，以增加阿拉斯加原住民，妇女，少数民族和残疾人在STEM领域的代表性。我们将通过多种媒体和专业会议和出版物向公众和科学观众广泛展示。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为是通过评估而被视为珍贵的支持。