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首页> 外文期刊>Journal of oceanography >Integral Descriptors of the Vertical Structure of the Ocean
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Integral Descriptors of the Vertical Structure of the Ocean

机译：海洋垂直结构的整体描述

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We propose a simple polynomial expression for neutral density and nutrients as a function of potential temperature, pressure and salinity. The expression is applied to the 1988 North Atlantic A16N WOCE meridional section and the polynomial coefficients are calculated using an inverse technique. The resulting polynomials show good skill in reproducing the nutrients and density structure, as verified through an analysis of variance (ANOVA) test. The large-scale changes in the polynomial coefficients occur between equatorial (E), tropical (T), subtropical (ST), and subpolar (SP) waters. The temperature and pressure coefficients experience substantial changes at all transitions (E-T, T-ST, and ST-SP), while the salinity ones only have major variations at the T-ST transition. Mesoscale-like oscillations occur all along the section but are relatively small, except between about 40 and 50°N, in a region of rough bottom topography. The density field is reconstructed using individual and group coefficients, and the contribution of each coefficient is identified. The method is also applied to analyze the neutral density distribution in a nearly identical 2003 section, removing near-surface density values that may be related to different warming/cooling of the surface layer. The results show close resemblances but also some significant variations, which are discussed in terms of interdecadal variability. Hence, we argue that the set of calculated coefficients provides good integral descriptors for the vertical structure of the ocean.
机译：我们建议中性密度和营养素作为潜在温度，压力和盐度的函数的简单多项式表达式。该表达式适用于1988年北大西洋A16N WOCE子午线截面，并使用逆技术计算多项式系数。通过方差分析（ANOVA）检验证明，所得多项式在繁殖养分和密度结构方面显示出良好的技能。多项式系数的大规模变化发生在赤道（E），热带（T），亚热带（ST）和亚极地（SP）水之间。温度和压力系数在所有跃迁（E-T，T-ST和ST-SP）都会发生显着变化，而盐度系数在T-ST跃迁中只有较大的变化。在整个剖面上都出现类似中尺度的振荡，但在粗糙的底部地形区域中，除约40至50°N外，振荡相对较小。使用单个系数和组系数重构密度场，并确定每个系数的贡献。该方法还适用于分析几乎相同的2003年截面中的中性密度分布，去除了可能与表面层的不同加热/冷却有关的近表面密度值。结果显示出相似之处，但也存在一些显着变化，这些变化在年代际变化方面进行了讨论。因此，我们认为计算出的系数集为海洋的垂直结构提供了良好的整体描述符。

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