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Wave-Ice-Ocean Interactions along the Arctic Coast

北极海岸的波浪-冰-海洋相互作用

基本信息

批准号：
1818485
负责人：
James Thomson
金额：
$ 97.53万
依托单位：
University of Washington
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2021-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1818485&HistoricalAwards=false
关键词：
Wave Ice Ocean Interactions along

项目摘要

Arctic coastlines, and in particular the northern coast of Alaska, are eroding at rates of meters per year. Coastal flooding events are becoming more common, as reductions in seasonal sea ice create large fetches for autumn storms. This project will improve understanding of oceanographic factors associated with coastal erosion and flooding, specifically the trend toward increasing surface wave activity throughout the western Arctic. The investigators will combine field observations and a coupled modeling system to quantify wave-ice-ocean interactions along the Alaska's northern coast. The outcome will be an open-source, process-based modeling system, including model grids and test cases for the northern Alaska coastal zone. This will enhance basic research, public infrastructure planning, climate scenario assessment, and policy-making capability. Public outreach will include K-12 events and public seminars, and the project will provide training for a postdoctoral researcher. Understanding wave-ice-ocean interactions along the Arctic coast is essential to improving the skill of forecast and climate models in the region. These interactions continue to be a focal point for basic research because of the complexities and possible nonlinearities associated with these processes. The project will connect a rapidly changing climatology with the physical processes that are fundamental to Arctic coastal ocean, incorporating natural variability on a wide range of spatial and temporal scales. The investigators will apply recent progress in process-based modeling of coastal dynamics, provide detailed field observations along the coast for model validation and calibration, and generate a 20-year hindcast. The hindcast will then be used to investigate the climate signals in Arctic wave-ice-ocean coupling and determine: 1) the significance of coastal protection via scattering and dissipation of waves by sea ice; 2) the thermodynamic and mechanical effects of increasing wave energy; and 3) the changes in coastal flooding and circulation associated with increasing wave momentum. These results will fill a gap between the recent progress modeling wave-ice interactions in deep-water and existing programs studying erosion at the shoreline.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.

北极海岸线，特别是阿拉斯加的北方海岸，正以每年几米的速度被侵蚀。随着季节性海冰的减少为秋季风暴创造了巨大的吸引力，沿海洪水事件变得越来越普遍。该项目将提高人们对与海岸侵蚀和洪水相关的海洋因素的了解，特别是整个北极西部地区表面波活动增加的趋势。研究人员将联合收割机实地观察和耦合建模系统，以量化阿拉斯加北方沿着波浪-冰-海洋相互作用。其成果将是一个开源的、基于流程的建模系统，包括阿拉斯加北方沿海地区的模型网格和测试案例。这将增强基础研究、公共基础设施规划、气候情景评估和决策能力。公共宣传将包括K-12活动和公共研讨会，该项目将为博士后研究人员提供培训。了解北极沿岸沿着的波浪-冰-海洋相互作用对提高该地区的预报和气候模式技能至关重要。由于这些过程的复杂性和可能的非线性，这些相互作用仍然是基础研究的焦点。该项目将把迅速变化的气候学与对北极沿海海洋至关重要的物理过程联系起来，在广泛的空间和时间尺度上纳入自然变异。调查人员将应用基于过程的沿海动态建模的最新进展，为模型验证和校准提供沿沿着的详细实地观测，并生成20年的后报。然后，将使用后报来研究北极波浪-冰-海洋耦合中的气候信号，并确定：1）通过海冰散射和消散波浪来保护海岸的重要性; 2）增加波浪能量的热力学和机械效应;以及3）与增加波浪动量相关的沿海洪水和环流的变化。这些成果将填补近期深水波浪-冰相互作用建模进展与现有海岸线侵蚀研究项目之间的空白。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。