| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Mesosphere has many unsolved phenomena compared with troposphere and stratosphere because observation regions and resolutions are scanty in mesosphere. The purpose of the study is to reveal three-dimensional structure of mesospheric gravity wave activities and their driving general circulation. At first, the long-term wind velocity data observed with the Poker Flat MF radar (65N, 147W) were analyzed to show local time dependence and seasonal climatologies of the 12 h and 24 h components in the mesospheric winds and their modulations of gravity wave kinetic energy. Next, mesospheric gravity waves have large amplitudes of wind velocity and temperature. We derived new three-dimensional wave activity flux more correctly applicable to mesospheric gravity wave in the mass-weighted isentropic time mean equations. These studies were published as two manuscripts.
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