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NSFGEO-NERC: Collaborative Research: Properties and Mechanisms of the Multiscale Eddy-Induced Diffusion

NSFGEO-NERC：合作研究：多尺度涡激扩散的特性和机制

基本信息

批准号：
1849990
负责人：
Igor Kamenkovich
金额：
$ 45.31万
依托单位：
University of Miami
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-06-01 至 2023-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1849990&HistoricalAwards=false
关键词：
NSFGEO NERC Collaborative Research Properties

项目摘要

Ocean eddies are fundamental to the distribution of properties such as heat, nutrients, carbon, and pollutants. This project will examine the effects of ocean eddies in distributing properties over time and space. The project uses established theory in geophysical fluid dynamics, a suite of state of the art numerical models, and ocean observations to examine how eddies distribute properties over space and time. The results will be a set of data that can be used to improve representations of the effects of eddies in numerical models of the ocean circulation and climate. 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.This project will explore properties of the inhomogeneous and anisotropic eddy-induced transport at mid-latitudes and examine their importance for tracer distribution. The eddy-induced transport will be quantified by a spatio-temporal map of the eddy diffusivity tensor which will be analyzed to explore the dependence of the results on the spatial and temporal scales used to define the eddies. This diffusivity map will then be used to produce tracer distributions in flows that do not fully resolve the eddy-driven tracer advection, and the resulting skill will be quantified. A hierarchy of eddy-resolving numerical simulations and observations from drifting buoys will be used. The study will advance fundamental understanding of how, where, and why different processes and scales contribute to the material transport and will develop novel methods for estimating scale-aware eddy diffusivity tensors.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.

海洋涡旋是热量、营养物质、碳和污染物分布的基础。这个项目将研究海洋涡流在时间和空间上分布特性的影响。该项目利用地球物理流体动力学的既定理论、一套最先进的数值模型和海洋观测来研究涡旋在空间和时间上的分布特性。结果将是一组数据，可用于改善海洋环流和气候数值模型中涡流影响的表现。该项目是美国和英国（UK）之间的合作项目，英国部分由英国国家环境研究委员会（NERC）通过与美国国家科学基金会的协议提供支持。本项目将探索中纬度地区非均匀和各向异性涡旋诱导输运的性质，并研究它们对示踪剂分布的重要性。涡旋诱导输运将通过涡旋扩散张量的时空图来量化，并对其进行分析，以探讨结果对用于定义涡旋的时空尺度的依赖性。该扩散率图随后将用于生成未完全解决旋涡驱动示踪剂平流的流中的示踪剂分布，并将对结果进行量化。将使用漩涡解析数值模拟和漂流浮标观测的层次结构。这项研究将促进对不同过程和尺度如何、在哪里以及为什么影响物质传输的基本理解，并将开发新的方法来估计尺度感知的涡流扩散张量。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。