Day-to-day variations of migrating semidiurnal tide in the mesosphere and thermosphere

Yasunobu Miyoshi, Hitoshi Fujiwara

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Abstract

By using a general circulation model, we examine behavior of the migrating semidiurnal tide for solar cycle moderate and geomagnetically quiet conditions. We investigate day-to-day variabilities of the migrating semidiurnal tide in the mesosphere and thermosphere and their relation with the migrating semidiurnal tide generated in the lower atmosphere. The results show that day-to-day variations of the migrating semidiurnal tide are evident from the tropopause to the thermosphere. Fluctuations of the migrating semidiurnal amplitude with periods of 10-12 and 25 days are found at altitudes from 20 to 250 km, indicating dynamical coupling between the mesosphere and thermosphere and the lower atmosphere.

Original languageEnglish
Pages (from-to)199-207
Number of pages9
JournalMemoirs of National Institute of Polar Research, Special Issue
Issue number59
Publication statusPublished - Mar 2006

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semidiurnal tide
thermosphere
mesosphere
atmosphere
tropopause
solar cycle
general circulation model

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences (miscellaneous)

Cite this

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abstract = "By using a general circulation model, we examine behavior of the migrating semidiurnal tide for solar cycle moderate and geomagnetically quiet conditions. We investigate day-to-day variabilities of the migrating semidiurnal tide in the mesosphere and thermosphere and their relation with the migrating semidiurnal tide generated in the lower atmosphere. The results show that day-to-day variations of the migrating semidiurnal tide are evident from the tropopause to the thermosphere. Fluctuations of the migrating semidiurnal amplitude with periods of 10-12 and 25 days are found at altitudes from 20 to 250 km, indicating dynamical coupling between the mesosphere and thermosphere and the lower atmosphere.",
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journal = "Memoirs of National Institute of Polar Research, Special Issue",
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AB - By using a general circulation model, we examine behavior of the migrating semidiurnal tide for solar cycle moderate and geomagnetically quiet conditions. We investigate day-to-day variabilities of the migrating semidiurnal tide in the mesosphere and thermosphere and their relation with the migrating semidiurnal tide generated in the lower atmosphere. The results show that day-to-day variations of the migrating semidiurnal tide are evident from the tropopause to the thermosphere. Fluctuations of the migrating semidiurnal amplitude with periods of 10-12 and 25 days are found at altitudes from 20 to 250 km, indicating dynamical coupling between the mesosphere and thermosphere and the lower atmosphere.

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