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首页> 外文期刊>Journal of Physical Oceanography >Gravitational Potential Energy Balance for the Thermal Circulation in a Model Ocean
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Gravitational Potential Energy Balance for the Thermal Circulation in a Model Ocean

机译：模拟海洋中热循环的重力势能平衡

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摘要

The gravitational potential energy balance of the thermal circulation in a simple rectangular model basin is diagnosed from numerical experiments based on a mass-conserving oceanic general circulation model. The vertical mixing coefficient is assumed to be a given constant. The model ocean is heated/cooled from the upper surface or bottom, and the equation of state is linear or nonlinear. Although the circulation patterns obtained from these cases look rather similar, the energetics of the circulation may be very different. For cases of differential heating from the bottom with a nonlinear equation of state, the circulation is driven by mechanical energy generated by heating from the bottom. On the other hand, circulation for three other cases is driven by external mechanical energy, which is implicitly provided by tidal dissipation and wind stress. The major balance of gravitational energy in this model ocean is between the source of energy due to vertical mixing and the conversion from kinetic energy at low latitudes and the sink of energy due to convection adjustment and conversion to kinetic energy at high latitudes.
机译：通过基于质量守恒的海洋总环流模型的数值实验，可以诊断简单矩形流域中热循环的重力势能平衡。假定垂直混合系数为给定常数。模型海洋是从上表面或底部加热/冷却的，状态方程是线性或非线性的。尽管从这些情况中获得的循环模式看起来非常相似，但是循环的能量学可能会非常不同。对于使用非线性状态方程从底部进行加热的情况，循环由底部加热产生的机械能驱动。另一方面，其他三种情况的循环是由外部机械能驱动的，潮汐耗散和风应力隐含地提供了外部机械能。在该模型海洋中，重力能量的主要平衡介于垂直混合和低纬度动能转换与对流调整和高纬度动能转换之间的能量吸收之间。

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