SGER: Turbulence Properties in the Mixed Layer/Thermocline Transition Layer

SGER:混合层/温跃层过渡层中的湍流属性

基本信息

  • 批准号:
    0721168
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2007
  • 资助国家:
    美国
  • 起止时间:
    2007-03-01 至 2009-08-31
  • 项目状态:
    已结题

项目摘要

Abstract OCE-0721168This study focuses on upper-ocean processes that impact the near-surface physics of the ocean and control the oceanic heat budget, which moderates global climate and the upper-ocean nutrient fluxes which moderate oceanic production and thus fisheries. The oceanic mixed layer is the uppermost portion of the ocean; it is a region of intense mixing where turbulence supplied by wind and waves homogenizes the vertical distribution of temperature and salinity down to depths of O(100m). Below this layer, in the upper layers of the stratified thermocline, turbulent Reynolds numbers are several orders of magnitude smaller. Although the transition between these two regimes is assumed to take place abruptly at the mixed-layer base, observations suggest that enhanced turbulence penetrates significantly into the stratified water just below the mixed layer. In this study, scientists at FSU will examine existing turbulence data collected during the past 20 years and low- and mid-latitude sites. These data allow for direct estimates of diffusivity and diapycnal flox occurring in the transition layer. The results will shed light on the suitability of parameterizations which are presently used to simulate upper ocean turbulence in numerical models of the global climate. Thus the study will have a broad impact on these models which are used in the prediction of issues that are important to society.
摘要OCE-0721168这项研究的重点是上层海洋的过程,影响海洋的近地表物理和控制海洋热收支,这缓和了全球气候和上层海洋营养通量,缓和海洋生产,从而渔业。海洋混合层是海洋的最上层;它是一个强烈混合的区域,风和波浪提供的湍流使温度和盐度的垂直分布均匀化,直到深度O(100米)。在这一层以下,在分层温跃层的上层,湍流雷诺数要小几个数量级。虽然这两个制度之间的过渡被假定为突然发生在混合层的基础上,观测表明,增强湍流渗透到分层的水混合层下面显着。在这项研究中,FSU的科学家将检查过去20年收集的现有湍流数据以及低纬度和中纬度地区。这些数据允许直接估计的扩散率和diapycnal flox发生在过渡层。这些结果将揭示目前用于全球气候数值模式中模拟上层海洋湍流的参数化的适用性。 因此,这项研究将对这些模型产生广泛的影响,这些模型用于预测对社会重要的问题。

项目成果

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Louis St Laurent其他文献

Louis St Laurent的其他文献

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{{ truncateString('Louis St Laurent', 18)}}的其他基金

Collaborative Research: Autonomous sampling of upper ocean mixing in the Southern Ocean due to wind forcing and double-diffusion
合作研究:由于风力强迫和双扩散而对南大洋上层海洋混合进行自主采样
  • 批准号:
    1558639
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons
合作研究:大洋中脊断裂带峡谷中的流动、湍流和混合
  • 批准号:
    1233289
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Mixing, Flow and Hydrography in the Rift Valley of the Lucky Strike Segment (37:20N, Mid-Atlantic Ridge)
合作研究:Lucky Strike 东非大裂谷的混合、流动和水文学(北纬 37:20,大西洋中脊)
  • 批准号:
    0550280
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Standard Grant

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