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首页> 外文期刊>Journal of Physical Oceanography >Water Mass Transformation in Salinity Temperature Space
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Water Mass Transformation in Salinity Temperature Space

机译：盐度温度空间中的水质转化

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摘要

This article presents a new framework for studying water mass transformations in salinity temperature space that can, with equal ease, be applied to study water mass transformation in spaces defined by any two conservative tracers. It is shown how the flow across isothermal and isohaline surfaces in the ocean can be quantified from knowledge of the nonadvective fluxes of heat and salt. It is also shown how these cross-isothermal and cross-isohaline flows can be used to form a continuity equation in salinity temperature space. These flows are then quantified in a state-of-the-art ocean model. Two major transformation cells are found: a tropical cell driven primarily by surface fluxes and dianeutral diffusion and a conveyor belt cell where isoneutral diffusion is also important. Both cells are similar to cells found in earlier work on the thermohaline streamfunction. A key benefit with this framework over a streamfunction approach is that transformation due to different diabatic processes can be studied individually. The distributions of volume and surface area in S-T space are found to be useful for determining how transformations due to these different processes affect the water masses in the model. The surface area distribution shows that the water mass transformations due to surface fluxes tend to be directed away from S-T regions that occupy large areas at the sea surface.
机译：本文提出了一个研究盐度温度空间中水质转化的新框架，该框架可以同样容易地应用于研究由任意两个保守示踪剂定义的空间中的水质转化。它显示了如何通过对热量和盐的非平流通量的认识来量化海洋中等温和等盐表面的流量。还显示了如何在盐度温度空间中使用这些交叉等温线和交叉等盐线流来形成连续性方程。然后，在最新的海洋模型中对这些流量进行量化。发现了两个主要的转化细胞：主要由表面通量和二中性扩散驱动的热带细胞，以及等中性扩散也很重要的输送带细胞。这两个单元格都与之前有关热盐流功能的研究中的单元格相似。与流函数方法相比，此框架的主要好处是可以单独研究由于不同绝热过程引起的转换。发现S-T空间中体积和表面积的分布对于确定由于这些不同过程而引起的转换如何影响模型中的水团非常有用。表面积分布表明，由于表面通量引起的水质转化趋向于远离在海面占据较大面积的S-T区。

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