Ocean weather systems on icy moons, with application to Enceladus

We explore ocean circulation on a rotating icy moon driven by temperature gradients imposed at its upper surface due to the suppression of the freezing point of water with pressure, as might be induced by ice thickness variations on Enceladus. Employing high-resolution simulations, we find that eddies dominate the circulation and arise from baroclinic instability, analogous to Earth’s weather systems. Multiple alternating jets, resembling those of Jupiter’s atmosphere, are sustained by these baroclinic eddies. We establish a theoretical model of the stratification and circulation and present scaling laws for the magnitude of the meridional heat transport. These are tested against numerical simulations. Through the identification of key non-dimensional numbers, our simplified model is applied to other icy moons. We conclude that baroclinic instability is central to the general circulation of icy moons., , , # Ocean weather systems on icy moons, with application to Enceladus

[https://doi.org/10.5061/dryad.f7m0cfz52](https://doi.org/10.5061/dryad.f7m0cfz52)

## Description

The NetCDF files in this dataset are used to create figures in the corresponding paper. These files are either long-term zonal-mean averages or 3D snapshots. `kappa` and `DeltaT` in the file names represent diffusivity and the prescribed temperature (°C) difference used in that simulation respectively.

我们研究了旋转冰卫星上的海洋环流，该环流由其上层表面的温度梯度驱动——这种温度梯度源于压力对水冰点的抑制作用，而土卫二（Enceladus）上的冰层厚度变化可能会诱发此类压力变化。通过高分辨率模拟，我们发现涡旋主导了环流，且其产生源于斜压不稳定（baroclinic instability），这与地球的天气系统类似。多个交替的射流（类似木星大气中的射流）由这些斜压涡旋维持。我们建立了层结与环流的理论模型，并提出了经向热输送量级的标度律。这些模型和标度律通过数值模拟进行了验证。通过识别关键无量纲数，我们的简化模型被应用于其他冰卫星。我们得出结论：斜压不稳定是冰卫星大气环流的核心机制。

# 冰卫星上的海洋天气系统及其在土卫二上的应用

[https://doi.org/10.5061/dryad.f7m0cfz52](https://doi.org/10.5061/dryad.f7m0cfz52)

## Description

本数据集的NetCDF文件用于生成对应论文中的图表。这些文件要么是长期纬向平均数据，要么是三维快照。文件名中的`kappa`和`DeltaT`分别代表该模拟中使用的扩散系数和指定温度（°C）差。