Collaborative Research: Evaluating mechanisms for enhanced mixing below tropical instability waves

合作研究：评估热带不稳定波下方增强混合的机制

• 批准号: 2049145
• 负责人: James Moum
• 金额: $ 87.17万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2049145&HistoricalAwards=false
• 关键词: Collaborative; Research; Evaluating; mechanisms; enhanced

This project supports an oceanographic field campaign in the tropical Pacific to make high temporal and spatial resolution measurements from moorings and ship of the oceanic velocity, density, and microstructure. Observations will be made of westward propagating oceanic fronts in the presence of Tropical Instability Waves (TIW) to better understand their influence on mixing and modulation of oceanic internal waves. The proposed work has important implications for understanding the El Nino Southern Oscillation (ENSO) and the role of the tropical oceans in climate. Education and outreach for this project will include mentoring a graduate student and postdoc, science presentations at local high schools, mentorship for Research Experience for Undergraduates (REU) interns, and participation in the Ocean Discovery Institute homework assistance program.This project addresses the dynamic processes that govern the observed modulation of internal waves, and turbulent mixing, by TIWs in the equatorial Pacific and the potential effects on heat regulation and ENSO predictability. Mechanisms to be studied include radiation of downward propagating internal waves from TIWs, modulation of the internal wave field by TIWs, and the fate of the internal waves in the presence of critical layers. The observational campaign will employ moorings, ship-mounted acoustics, ship-based profiling systems including a rapid profiling CTD (fastCTD) and a turbulence profiler (Epsilometer), and three autonomous drifting wave-powered profilers (WireWalkers). Three moorings will be deployed for a year north of the operational 140°W Tropical Atmosphere Ocean (TAO) mooring to target the seasonal cycle in the TIW modulation of internal waves and mixing.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.

该项目支持热带太平洋地区的海洋现场运动，以通过海洋速度，密度和微观结构的系泊和船来进行高临时和空间分辨率的测量。在存在热带不稳定波（TIW）的情况下，将观察到向西传播海洋阵线，以更好地了解它们对海洋内部波的混合和调节的影响。拟议的工作对理解埃尔尼诺南部振荡（ENSO）和热带海洋在气候中的作用具有重要意义。 Education and outreach for this project will include mentaling a graduate student and postdoc, science presentations at local high schools, mentalship for Research Experience for Undergraduates (REU) interns, and participation in the Ocean Discovery Institute homework assistance program.This project addresses the dynamic processes that govern the observed modulation of internal waves, and turbulent mixing, by TIWs in the equitorial Pacific and the potential effects on heat regulation and ENSO predictability.要研究的机制包括从TIWS向下传播内波的辐射，通过TIWS对内波场的调节以及在存在关键层的存在下内波的命运。观察活动将采用系泊设备，船上的声学，基于船舶的分析系统，包括快速分析CTD（FASTCTD）和一个湍流探险器（Epsilter计）以及三个自主驾驶波动波动式供电探测器（WireWalkers）。在运营140°W热带气氛海洋（TAO）泊位中，将部署三个系泊设备，以针对季节性周期的季节性周期，以内部波和混合的调制。该奖项反映了NSF的法定任务，并通过使用该基金会的智力功能和广泛的影响来评估NSF的法定任务。