| タイトル | Global Frequency and Distribution of Lightning as Observed by the Optical Transient Detector (OTD) |
| 著者（英） | Mach, Douglas M.; Christian, Hugh J.; Koshak, William J.; Buechler, Dennis E.; Driscoll, Kevin T.; Boeck, William L.; Blakeslee, Richard J.; Goodman, Steven J.; Hall, John M.; Boccippio, Dennis J. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1999-01-01
1999 |
| 言語 | eng |
| 内容記述 | The Optical Transient Detector (OTD) is a space-based instrument specifically designed to detect and locate lightning discharges (intracloud and cloud-to-ground) as it orbits the Earth. A statistical examination of OTD lightning data reveals that nearly 1.2 billion flashes occurred over the entire earth during the one year period from September 1995 through August 1996. This translates to an average of 37 lightning flashes occurring around the globe every second, which is well below the traditional estimate of 100 flashes per second. An average of 75% of the global lightning activity during the year occurs between 30 deg S and 30 deg N. An analysis of the annual lightning distribution reveals that an average of 82% of the lightning flashes occur over the continents and 18% over the oceans, which translates to an average land-ocean flash density ratio of nearly 11. |
| NASA分類 | Meteorology and Climatology |
| 権利 | Copyright |
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