Excellence in Research: The role of wave-current-ice interaction to a freshwater plume dynamics

卓越的研究：波-流-冰相互作用对淡水羽流动力学的作用

• 批准号: 2154154
• 负责人: Meng Xia
• 金额: $ 50万
• 依托单位: University of Maryland Eastern Shore
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-12-01 至 2025-11-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2154154&HistoricalAwards=false
• 关键词: Excellence; Research; role; wave; current

River plume dynamics are an important phenomenon to an estuarine circulation contributing to transport of estuarine materials and momentum balance, which are seasonally active in intertidal zones depending upon the Coriolis force, wind, tide, and freshwater discharges. For example, Lake Michigan (one of the Great Lakes) witnesses 10 km wide plume that resuspends materials extending over 100 km southern shore in every spring. However, factors responsible for the variability are not yet understood. The temperate climate of southern Lake Michigan is potentially influenced by the colder climate and ice covers in its northern basin. Southern basin is intervened by the denser population in the surroundings and prone to water pollution though the riverine channels. This proposed project aims to use a coupled hydrodynamics and ice numerical model developed for the Lake Michigan to investigate the: (a) effects of the wave-current-ice-plume interactions on coastal plume formation, (b) mechanism of plume interaction with the ice dynamics when ice cover is mobile, (c) projection of plume behavior/occurrence under climate scenarios in southern Lake Michigan. This project will help expand a pool of minority students in the field, by supporting the only physical oceanography numerical modeling laboratory within the HBCU community in the continental US and by providing students from underrepresented groups with opportunities to integrate research with their education through inquiry-based learning at an HBCU. The proposed research will advance understanding of the factors governing plume behavior in a large lake and how the lake current, waves, and ice are in turn influenced by the plumes, using numerical hydrodynamic-wave-ice modeling. Idealized numerical experiments will separate the factors in the complex system of plume interactions with currents, waves, and ice and reveal important factors that dominate the impacts on plume behavior. The future projection of the plume dynamics in southern Lake Michigan considering scenarios of climate change can forward the study to investigate nutrient distributions and productivity resolving one of the real-world challenges. Specifically, the proposed project will lead to the following intellectual merits: Advanced understanding of river/sediment plume interactions with currents, waves, and ice cover and the energy balance in these interactions; Future projections of plume dynamics out the mid-century under the climate change scenarios that will lead to understand the nutrients distribution and redefine the productivity zone; Future projections of current, wave, and ice environments in southern Lake Michigan out to the mid-century.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.

河羽动力学是河口循环的重要现象，该现象有助于河口材料的运输和动量平衡，这些现象取决于潮间带的季节性活动，具体取决于科里奥利力，风，潮汐，潮汐和淡水排放。例如，密歇根湖（其中一个大湖区）目击者目睹了10公里宽的羽毛，该羽毛在每年春季延伸到南海岸100公里以上的材料。但是，尚不了解负责变异性的因素。密歇根州南部的温带气候可能受到其北部盆地较冷的气候和冰盖的影响。南部盆地被周围环境中的密集人口干预，并通过河道通道容易受到水污染。该提出的项目旨在使用为密歇根湖开发的耦合的流体动力和冰算模型，以研究以下方面：（a）波动 - 冰冰盘相互作用对沿海羽状形成的影响，（b）当冰盖流动时，（c）在Southern Seanter in Southern seeprence in Southern Seantarimios中，冰覆盖的机理与冰动力学的机制与冰覆盖率的机理与冰的动态相互作用。该项目将通过支持美国大陆HBCU社区内唯一的物理海洋学数字建模实验室，并通过为代表性不足的团体提供机会通过基于询问的学习，通过在HBCU的HBCU学习将研究整合到他们的教育中，来帮助扩大该领域的少数民族学生。拟议的研究将进一步理解大湖中羽流行为的因素，以及使用数值流体力学波冰建模的湖泊电流，波浪和冰如何受羽流的影响。理想化的数值实验将使羽流相互作用与电流，波和冰的复杂系统中的因素分开，并揭示重要因素，从而占主导地位对羽流行为的影响。考虑到气候变化的情况，密歇根州南部李子动力学的未来预测可以转发这项研究，以调查营养分布和生产力解决现实世界中的挑战之一。具体而言，拟议的项目将导致以下智力优点：对河流/沉积物羽流与电流，波浪和冰覆盖的高级了解以及这些相互作用的能量平衡；在气候变化方案下，未来对羽状动态的预测将导致了解营养分布并重新定义生产力区域；该奖项反映了NSF的法定任务，未来对密歇根州南部的当前，波浪和ICE环境的预测。