The Energetics of Ocean Heat Transport
The Energetics of Ocean Heat Transport
复制标题
海洋热传输的能量
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
G. Vallis
中科院分区：
文献类型：
--
作者：
A. Gnanadesikan;R. Slater;P. Swathi;G. Vallis
最近的一些论文认为，海洋的机械能收支限制了热盐环流的驱动方式。这些论文被用来论证，气候模型没有具体考虑混合能量，可能会错过一个关于气候变化的非常重要的反馈。这篇论文重新审视了关于气候系统的能量论证能告诉我们什么问题，并得出结论：能量学和气候之间的关系不是直截了当的。通过对浮力输运方程的分析，证明了海洋内部大规模的热量输运需要约0.2 TW的能量源来完成垂直输运，需要约0.4 TW的能量源来完成水平输运。在两种环流模式中，这种能量几乎完全由地面风提供。热传递与机械能供给之间没有必然的关系。
Abstract A number of recent papers have argued that the mechanical energy budget of the ocean places constraints on how the thermohaline circulation is driven. These papers have been used to argue that climate models, which do not specifically account for the energy of mixing, potentially miss a very important feedback on climate change. This paper reexamines the question of what energetic arguments can teach us about the climate system and concludes that the relationship between energetics and climate is not straightforward. By analyzing the buoyancy transport equation, it is demonstrated that the large-scale transport of heat within the ocean requires an energy source of around 0.2 TW to accomplish vertical transport and around 0.4 TW (resulting from cabbeling) to accomplish horizontal transport. Within two general circulation models, this energy is almost entirely supplied by surface winds. It is also shown that there is no necessary relationship between heat transport and mechanical energy supply.