Collaborative Research: The Internal Wave Spectrum and Boundary Mixing in the Sub-Tropical South Atlantic

合作研究：亚热带南大西洋的内波谱和边界混合

• 批准号: 2232441
• 负责人: Jacob Wenegrat
• 金额: $ 33.99万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2232441&HistoricalAwards=false
• 关键词: Collaborative; Research; Internal; Wave; Spectrum

The research will examine the capability of global scale Ocean Circulation Models (OCMs) to represent internal gravity waves, their dynamics and mixing with characterizing the oceanic internal wavefield at regional scales through a targeted field campaign and numerical investigations. The project will obtain new observations through a field campaign and targeted numerical simulations and will leverage existing data. This project is jointly funded by NSF and the Office of Naval Research (ONR) through the National Oceanographic Partnership Program (NOPP).A moored array will be deployed in the Brazil Basin to quantify near boundary flow distortions due to finite amplitude topography, near boundary internal wave breaking, and momentum and buoyancy fluxes in both turbulent and internal wavebands. Extant data obtained as part of a Tracer Release Experiment in the same domain and data from the Global Drifter Program will be used to create a regional statistical characterization of the oceanic internal wavefield in the Sub-Tropical South Atlantic. This characterization will be compared to a hierarchy of five models: an operational forecast model (HYCOM), O(1-3) km horizontal resolution ROMS-CROCO, a nonhydrostatic ROMS-CROCO ’mountain scale’ simulations with 50 m resolution, a realistic Large Eddy Simulations (LES), and a quasi-analytic spectral representation of the internal wave energy spectrum.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.

该研究将研究全球尺度海洋循环模型（OCM）代表内部重力波，动态和与海洋内部波场在区域尺度上通过有针对性的现场运动和数值研究在区域尺度上的表征的能力。该项目将通过现场活动和针对数值模拟获得新的观察结果，并将利用现有数据。该项目由NSF和海军研究办公室（ONR）通过国家海洋学合作伙伴计划（NOPP）共同资助。停泊的阵列将部署在巴西盆地中，以量化由于有限放大器的突出，附近的边界流量扭曲，近乎边界内部波浪破裂，动力和浮力的内部和内部涡轮上的波动型。作为示踪剂释放实验在同一域中获得的现有数据，来自全球漂流者程序的数据将用于创建对亚热带南大西洋的海洋内部波场的区域统计表征。 This characterization will be compared to a hierarchy of five models: an operational forecast model (HYCOM), O(1-3) km horizo​​ntal resolution ROMS-CROCO, a nonhydrostatic ROMS-CROCO 'mountain scale' simulations with 50 m resolution, a realistic Large Eddy Simulations (LES), and a quasi-analytic spectrum representation of the internal wave energy spectrum.This award reflects NSF's法定使命，并使用基金会的知识分子优点和更广泛的影响标准通过评估被认为是宝贵的支持。