热对流层大气环流热力学
Thermodynamics of atmospheric circulation on hot Jupiters
摘要：
潮汐锁定系外行星上的大气环流是由吸收和再辐射来自主恒星的热量驱动的。它们是天然的热机，将热能转化为机械能。只有当存在耗散机械能的机制时，或者如果热的重新分布是如此有效以至于卡诺效率被驱动到零，稳定状态才是可能的。基于原始的、等效正压的或浅水的方程的模拟，没有明确规定动能的耗散和作为热的能量的恢复，违反了能量守恒。也许更严重的是，忽略阻力的物理来源可能会高估风速和从白天到夜晚的热量平流率。
英文摘要：
Atmospheric circulation on tidally-locked exoplanets is driven by the absorption and reradiation of heat from the host star. They are natural heat engines, converting heat into mechanical energy. A steady state is possible only if there is a mechanism to dissipate mechanical energy, or if the redistribution of heat is so effective that the Carnot efficiency is driven to zero. Simulations based on primitive, equivalent-barotropic, or shallow-water equations without explicit provision for dissipation of kinetic energy and for recovery of that energy as heat, violate energy conservation. More seriously perhaps, neglect of physical sources of drag may overestimate wind speeds and rates of advection of heat from the day to the night side.
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