| Project/Area Number |
26400464
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Nagoya University |
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Principal Investigator |
MINDA Haruya 名古屋大学, 宇宙地球環境研究所, 技術専門員 (80422765)
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| Co-Investigator(Kenkyū-buntansha) |
津田 紀生 愛知工業大学, 工学部, 教授 (20278229)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 降水レーダ / 降雪観測 / レーダ降雪強度 / マイクロ波散乱特性 / 粒子形状計測 / 降雪粒子観測 / 固体降水粒子マイクロ波散乱 / 立体形状計測 / マイクロ波散乱 / レーザ形状計測 / 粒径分布計 |
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| Outline of Final Research Achievements |
Quantitative radar snow-rate sensing requires a breakthrough improvement on the understandings of microwave scattering properties of solid hydrometeors. We have developed a new instrument, which is named as the Multi-angle Snowflake Imager (MSI), to capture physical properties of solid hydrometeors, such as a three-dimensional shape, snow density, fall velocity and their size distribution. To estimate the snow density, the hydrometeor’s mass measured by an electrical-balance-type snow-gauge is divided by the volume captured by the MSI. The MSI is validated by simultaneous observations with a 2D video disdrometer. To theoretically and observationally infer the scattering properties and radar signals, the snowflake physical properties and radar reflectivity factors were collected by using the MSI, multi-frequency precipitation radars and other sensors at Hokkaido and Kanazawa Universities in winter seasons. Finally, the preliminary observational data-set was developed.
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