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| Titel |
Detection of the HO2 enhancement with sprite event |
| VerfasserIn |
Takayoshi Yamada, Hideo Sagawa, Toru Adachi, Yasutaka Hiraki, Rue-Ron Hsu, Han-Tzong Su, Alfred Chen, Takao Sato, Mitsuteru Sato, Yukihiro Takahashi, Yasuko Kasai |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079798
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| Zusammenfassung |
| Sprites are lightning-induced secondary discharges appearing in the middle atmosphere. Both lateral and vertical scales are a few tens of kilometers, and 720 or more events occur in a day in the global [Sato et al.,2003]. It has been pointed out that sprite discharge may modulate atmospheric compositions in the middle atmosphere [Enell et al., 2008; Sentman et al., 2008; Hiraki et al., 2008]. Hiraki et al., [2008] suggested HO2 abundance is enhanced by sprite about 1000-10,000 times more than the background value at 40km.
We used two satellite observations to survey the air-mass, which has both HO2 abundance and sprite lightning simultaneously. A highly sensitive ‘Superconducting Submillimeter-Wave Limb Emission Sounder’ (SMILES) provides vertical profiles of HO2 abundance in upper atmosphere from International Space Station (ISS). Number of the HO2 observation is 180,000 points between 65S and 65N in the period from 12 October 2009 to 21 April 2010. Sprite lightning has been observed by UV/VIS (633 – 751 nm) part of ‘Imager of Sprites and Upper Atmospheric Lightning’ (ISUAL) mounted in the FORMOSAT-2 satellite [J.L. Chern 2003], and 120 most clear sprite events were detected during SMILES observation period/coverage. We found 2 cases that HO2 spectrum was certainly enhanced where sprite happened in the same air-mass. We will discuss the enhancement of HO2 abundance and its mechanism in the presentation. |
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