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: 2232439
• 负责人: Kurt Polzin
• 金额: $ 340.93万
• 依托单位: Woods Hole Oceanographic Institution
• 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=2232439&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.

该研究将检验全球尺度海洋环流模型（OCM）代表内部重力波、其动力学和混合的能力，并通过有针对性的实地活动和数值调查来表征区域尺度的海洋内部波场。该项目将通过这些获得新的观测结果。该项目由 NSF 和海军研究办公室 (ONR) 通过国家海洋学伙伴计划 (NOPP) 联合资助。将在巴西盆地部署一个系泊阵列。量化由于有限振幅地形、近边界内波破裂以及湍流和内波带中的动量和浮力通量而造成的近边界流动畸变，这些数据是作为同一域中示踪剂释放实验的一部分获得的，以及来自全球漂移器的数据。该程序将用于创建亚热带南大西洋海洋内部波场的区域统计特征，该特征将与五个模型的层次结构进行比较：业务预测模型（HYCOM）， O(1-3) km 水平分辨率 ROMS-CROCO、分辨率为 50 m 的非静水力 ROMS-CROCO“山地规模”模拟、逼真的大涡模拟 (LES) 以及内波能谱的准解析谱表示该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。