Day‐to‐day variations of migrating diurnal tide simulated by a GCM from the ground surface to the exobase

Yasunobu Miyoshi, Hitoshi Fujiwara

doi:10.1029/2003gl017695

Day‐to‐day variations of migrating diurnal tide simulated by a GCM from the ground surface to the exobase

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Yasunobu Miyoshi

Dept. of Earth and Planetary Sciences Kyushu Univ. Fukuoka Japan
Hitoshi Fujiwara

Dept. of Geophysics Tohoku Univ. Sendai Japan

書誌事項

公開日: 2003-08

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/2003gl017695

公開者: American Geophysical Union (AGU)

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説明

<jats:p>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.</jats:p>