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The Buoyancy Budget with a Nonlinear Equation of State

机译:带有非线性状态方程的浮力预算

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摘要

The nonlinear equation of state of seawater introduces a sink or source of buoyancy when water parcels of unequal salinities and temperatures are mixed. This article contains quantitative estimates of these nonlinear effects on the buoyancy budget of the global ocean. It is shown that the interior buoyancy sink can be determined from surface buoyancy fluxes. These surface buoyancy fluxes are calculated using two surface heat flux climatologies, one based on in situ measurements and the other on a reanalysis, in both cases using a nonlinear equation of state. It is also found that the buoyancy budget in the ocean general circulation model Nucleus for European Modeling of the Ocean (NEMO) is in good agreement with the buoyancy budgets based on the heat flux climatologies. Moreover, an examination of the vertically resolved buoyancy budget in NEMO shows that in large parts of the ocean the nonlinear buoyancy sink gives the largest contribution to this budget.
机译:当混合了不同盐度和温度的水块时,海水的非线性状态方程会引入一个浮点或浮力源。本文包含这些非线性影响对全球海洋浮力预算的定量估计。结果表明,内部浮力沉可以从表面浮力通量确定。这些表面浮力通量是使用两种表面热通量气候计算的,其中一种是基于现场测量,另一种是基于重新分析,在两种情况下均使用非线性状态方程。还发现,海洋总环流模型“欧洲海洋建模核心”(NEMO)的浮力预算与基于热通量气候学的浮力预算非常吻合。此外,对NEMO中垂直解析的浮力预算的研究表明,在海洋的大部分地区,非线性浮力阱对该预算的贡献最大。

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  • 来源
    《Journal of Physical Oceanography》 |2013年第1期|176-186|共11页
  • 作者

    Magnus Hieronymus; Jonas Nycer;

  • 作者单位

    Dept. of Meteorology, Stockholm University, Stockholm S-10691, Sweden;

    Department of Meteorology, Stockholm University, Stockholm, Sweden;

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  • 正文语种 eng
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