A study of mesospheric gravity wave activities and their driving general circulation
Project/Area Number |
15K21673
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Multi-year Fund |
Research Field |
Meteorology/Physical oceanography/Hydrology
Space and upper atmospheric physics
|
Research Institution | Japan Agency for Marine-Earth Science and Technology (2016-2017) National Institute of Information and Communications Technology (2015) |
Principal Investigator |
KINOSHITA Takenari 国立研究開発法人海洋研究開発機構, 大気海洋相互作用研究分野, 研究員 (20648638)
|
Project Period (FY) |
2015-04-01 – 2018-03-31
|
Project Status |
Completed (Fiscal Year 2017)
|
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)
|
Keywords | 重力波 / 中間圏 / 潮汐波 / 大気重力波 / ロスビー波 / 物質輸送 / 大気力学 |
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.
|
Report
(4 results)
Research Products
(25 results)