Day‐to‐day variations of migrating diurnal tide simulated by a GCM from the ground surface to the exobase
Day‐to‐day variations of migrating diurnal tide simulated by a GCM from the ground surface to the exobase
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DOI：
10.1029/2003gl017695
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发表时间：
2003-08
影响因子：
5.2
通讯作者：
Y. Miyoshi;H. Fujiwara
中科院分区：
文献类型：
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作者：
Y. Miyoshi;H. Fujiwara
本文建立了一个包含从地表到外基区域的新环流模型，并应用该模型研究了太阳活动周期极小和地磁安静条件下春分日潮的迁移行为。特别地，我们研究了中间层和热层迁移日潮的逐日变化，以及它们与低层大气产生的迁移日潮的关系。结果表明，从对流层上层到热层，迁移日潮的逐日变化是明显的。在20 ~ 300 km高度范围内，迁移日振幅的波动周期为12和25 d，表明中层和热层与低层大气之间存在动力耦合。
A new general circulation model (GCM) which contains the region from the ground surface to the exobase has been developed and used to investigate behavior of the migrating diurnal tide for equinox during solar cycle minimum and geomagnetically quiet conditions. In particular, we study day‐to‐day variations of migrating diurnal tides in the mesosphere and thermosphere and their relation with migrating diurnal tides generated in the lower atmosphere. The results show that day‐to‐day variations of the migrating diurnal tide are evident from the upper troposphere to the thermosphere. Fluctuations of the migrating diurnal amplitude with periods of 12 and 25 days are found in the height range from 20 to 300 km, indicating dynamical coupling between the mesosphere and thermosphere and the lower atmosphere.