Nearshore plume dynamics: Airborne observations and modeling of surf-shelf exchange

近岸羽流动力学：海陆架交换的机载观测和建模

• 批准号: 2048303
• 负责人: Melissa Moulton
• 金额: $ 69.6万
• 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: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2048303&HistoricalAwards=false
• 关键词: Nearshore; plume; dynamics; Airborne; observations

This project advance understanding of the nearshore environment by examining possible modifications to rip currents by warm and cold waters along a coastal strip. The project will examine such modifications also caused by different types of winds and waves. Research will scrutinize data already available and results from a mathematical model. Analysis will place rip-current behavior in a framework that considers different forces that modify the currents. The study will provide helpful information for surfers and swimmers, and for coastal zone managers to determine the fate of pollutants in the beach zone, from behind the breaking waves to the coastline. In general, the study will benefit society by improving safety in the beach zone. It will support one early-career scientist and a post-doctoral scholar. This project will study nearshore buoyant plumes related to rip currents and the corresponding flows. The study will explore the connection between buoyant waters and rip currents, and how the connection may change with different stratification conditions and forcing agents: wind, waves, and density gradients. Research will combine infrared airborne and in-situ observations (in hand) with idealized COAWST numerical modeling. The study will seek to determine the relative influence of plume buoyancy contrasts in a) driving rip currents and b) establishing cross-shelf exchange of mass. By determining such relative influence, the study will expand knowledge on bathymetrically related rip currents. This work seeks to place numerical results in a dynamical framework that considers the parameter space of Froude and Simpson non-dimensional numbers. As Broader Impacts, the study will address the influence of buoyancy effects on rip currents, which has been neglected before. Also as Broader Impacts, the study will include training of one post-doctoral scholar and one undergraduate student, and support for an early-career scientist.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.

该项目通过检查可能通过沿海地带的温暖和冷水进行撕裂电流的修改来提高对近岸环境的理解。该项目将检查这种修改也是由不同类型的风和波引起的。研究将审查已经可用的数据，并从数学模型中产生。分析将在考虑改变电流的不同力的框架内将RIP电流行为放置。这项研究将为冲浪者和游泳者提供有用的信息，并为沿海地区经理确定海滩区域的污染物的命运，从爆发浪潮到海岸线。总的来说，这项研究将通过提高海滩区的安全性来使社会受益。 它将支持一位早期的科学家和一名博士后学者。该项目将研究与RIP电流和相应流有关的近岸浮力羽毛。该研究将探索浮力水和撕裂电流之间的联系，以及该连接如何随着不同的分层条件和迫使剂的变化：风，波和密度梯度。研究将将红外空降和原位观测（手头）与理想化的COAWST数值建模相结合。该研究将寻求确定羽流浮力对比的相对影响在a）驱动撕裂电流和b）建立质量交换。通过确定这种相对影响，该研究将扩大有关测深度相关的RIP电流的知识。这项工作旨在将数值结果放置在一个动态框架中，该框架考虑了Froude和Simpson的非二维数字的参数空间。随着更广泛的影响，该研究将解决浮力影响对RIP电流的影响，这是之前已经忽略的。同样，随着更广泛的影响，该研究将包括对一名博士后学者和一名本科生的培训，并支持对早期职业科学家的支持。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准通过评估来获得支持的。

项目成果

COAWST model simulations of warm and cool nearshore rip-current plumes

COAWST 模型模拟近岸暖流和冷流离岸流羽流

• DOI: 10.5281/zenodo.4272080
• 发表时间: 2020
• 期刊: Zenodo
• 作者: Moulton, Melissa

Warm and Cool Nearshore Plumes Connecting the Surf Zone to the Inner Shelf

连接冲浪区和内陆架的温暖和凉爽的近岸羽流

• DOI: 10.1029/2020gl091675
• 发表时间: 2021
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Moulton, M.;Chickadel, C. C.;Thomson, J.
• 通讯作者: Thomson, J.