Physical processes in acoustic wave heating of the thermosphere
Physical processes in acoustic wave heating of the thermosphere
复制标题
热层声波加热的物理过程
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
R. Walterscheid
中科院分区：
文献类型：
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作者：
G. Schubert;M. Hickey;R. Walterscheid
[1]由于粘性耗散、感热通量发散和欧拉漂移功的影响，向上传播的声波加热了几乎所有高度的大气。声波引起的压力梯度功在所有高度提供冷却效果，但这被加热过程压倒。欧拉漂移功和波致压力梯度功在能量平衡中占主导地位，但在大多数高度上它们几乎相互抵消，留下它们的差值，再加上粘性耗散和感热通量散度，加热大气。声波与重力波有很大的不同，重力波是通过感热通量的辐散效应来冷却高层大气的。声波耗散可能是高层大气加热的一个重要来源。
[1] Upward propagating acoustic waves heat the atmosphere at essentially all heights due to effects of viscous dissipation, sensible heat flux divergence, and Eulerian drift work. Acoustic wave-induced pressure gradient work provides a cooling effect at all heights, but this is overwhelmed by the heating processes. Eulerian drift work and wave-induced pressure gradient work dominate the energy balance, but they nearly cancel at most altitudes, leaving their difference, together with viscous dissipation and sensible heat flux divergence to heat the atmosphere. Acoustic waves are very different from gravity waves which cool the upper atmosphere through the effect of sensible heat flux divergence. Acoustic wave dissipation could be an important source of upper atmospheric heating.