| Project/Area Number |
19740265
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
ISHIHARA Yoshiaki National Astronomical Observatory of Japan, RISE月探査プロジェクト, 研究員 (80400232)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | インフラサウンド / 微気圧変動 / 氷震 / 氷床振動 / 固体・海洋・大気カップリング / 極地 / 南極 / 領域融合 / カップリング |
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| Research Abstract |
We deploy an infrasound observation system at Syowa station, Antarctica. The system consists of an infrasound sensor (Chaparral Physics Model-2 : a condenser microphone type differential pressure sensor), a sensor housing, a mechanical low path filter (tube array), and a data logger. We validated the system under extreme condition at Antarctica, especially ; very low temperature and strong blizzard wind at Antarctic winter.
From Mar. 2008, we started pilot continuous observation. We monitor differential pressure variation around Syowa station at the infrasound band. Until now, we found out infrasound generated by icequakes, ice sheet movements, oceanic oscillations. Moreover, We found out the new type of infrasound has very long durations (a few to dozens of days) and harmonic overtone structure at some Hz to lower most human audible band.
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