| Project/Area Number |
24840040
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Waseda University |
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Principal Investigator |
ADACHI Toru 早稲田大学, 高等研究所, 助教 (10632391)
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| Project Period (FY) |
2012-08-31 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 雷放電 / 超高層放電 / 人工衛星 / リモートセンシング / 大気電気 / スプライト / エルブス |
|---|
| Research Abstract |
In this study, we analyzed satellite optical data and ground-based radio data to elucidate the electromagnetic coupling between the Earth's troposphere and ionosphere through lightning discharges and TLEs (Transient Luminous Events). It was shown that spaceborne optical instruments are useful to derive electrical properties of lightning. Based on the technique we developed here, it was found that the peak current intensity of lightning and the occurrence probability of elves are both higher over ocean than over land. It was also found that lightning discharges tend to have longer continuing current at higher latitudes, which is in good agreement with the result that the occurrence probability of sprites is higher at mid-latitudes than at low-latitudes.
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