NSFGEO-NERC: Collaborative Research: Energy transfer between submesoscale vortices and resonantly-forced inertial motions in the northern Gulf of Mexico

NSFGEO-NERC：合作研究：墨西哥湾北部亚中尺度涡旋和共振强迫惯性运动之间的能量转移

基本信息

批准号：
1851531
负责人：
Jonathan Nash
金额：
$ 165.87万
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：
2019
资助国家：
美国
起止时间：
2019-05-01 至 2025-04-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1851531&HistoricalAwards=false
关键词：
NSFGEO NERC Collaborative Research Energy

项目摘要

This project will use field observations from ship and numerical modeling to study circulation variability in the Mississippi-Atchafalaya River plume in the northern Gulf of Mexico. The region is characterized by a strong sea breeze which leads to the flow and wave variations on relatively small spatial scales of less than 1 km. The observations will take place during two field campaigns including ship, moored, and autonomous platforms. The modeling will include both realistic and idealized models for testing the hypotheses. Two graduate students and two postdocs will participate in the research. In addition, summer research experiences in the field will be provided to 2-3 undergraduates through the TAMU Summer Research Program for Undergraduates, for which applications from underrepresented groups and from local community colleges will be encouraged. The PIs will visit local, minority-serving undergraduate institutions to give presentations on the research and engage students in the summer research program. The project is a collaboration between the US and the United Kingdom (UK) with the UK component being supported by the UK National Environmental Research Council (NERC) through an agreement with NSF.Recently theories for ocean dynamics posit that submesoscale flows interacting with near-inertial motions are important for understanding the dynamics of both phenomena. This project will test theories of energy exchange at the submesoscale by studying circulation patterns in the Mississippi-Atchafalaya river plume in the northern Gulf of Mexico using a pair of field campaigns and idealistic and realistic numerical models. Observations from ship, moorings, and autonomous platforms will be made during two field campaigns. The modeling will include a hydrostatic ROMS model and idealized, non-hydrostatic Large Eddy Simulations (LES). The objective will be to characterize, quantify, and understand the energy exchanges between balanced and unbalanced motions and the turbulent cascade that can result from the interaction. Wave-mean flow interactions in the Mississippi-Atchafalaya river plume system could enhance mixing and vertical exchange, which are important for understanding coastal hypoxia and the dispersal of pollutants in the northern Gulf of Mexico.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.

该项目将使用船舶和数值建模中的现场观测来研究墨西哥北部海湾的密西西比州ACTHAFALAYA河羽流的循环变异性。该区域的特征是强烈的海风，导致相对较小的空间尺度小于1 km的流动和波浪变化。这些观察结果将在包括船舶，停泊和自主平台在内的两个现场活动中进行。该建模将包括测试假设的现实和理想化模型。两名研究生和两个博士学位将参与研究。此外，该领域的夏季研究经验将通过TAMU夏季研究计划为2 - 3名本科生提供，为此，将鼓励代表性不足的群体和当地社区大学的申请。 PI将访问当地的，少数族裔的本科机构，以进行研究，并参与夏季研究计划。该项目是美国和英国（英国）之间的合作，英国国家环境研究委员会（NERC）通过与NSF的协议支持了英国的组成部分。对海洋动力学的一项协议，对海洋动力学的理论认为，与近惯性运动相互作用的海洋动力学基础对于理解这两种现象的动力学都很重要。该项目将通过研究墨西哥北部的密西西比州ACTAFALAYA河羽流中的循环模式在墨西哥北部的密西西比州河河羽流中使用一对现场活动以及理想主义和现实的数值模型来测试能源交流理论。在两个现场活动中，将对船，系泊和自治平台进行观察。该建模将包括一个静水ROM模型和理想化的非静态大型涡流模拟（LES）。目的是表征，量化和理解平衡和不平衡运动之间的能量交流以及相互作用可能导致的湍流级联反应。 Mississippi-Achchafalaya河羽流中的波均流动相互作用可以增强混合和垂直交换，这对于理解沿海缺氧和污染物在墨西哥北部的污染物的分散至关重要。该奖项反映了NSF的立法任务，并被认为是通过基金会的智力评估来评估的，并且值得通过评估来评估基金会的优点和广泛的范围。