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| Titel |
Far from thunderstorm UV transient events in the atmosphere measured by Vernov satellite |
| VerfasserIn |
Violetta Morozenko, Pavel Klimov, Boris Khrenov, Gali Garipov, Margarita Kaznacheeva, Mikhail Panasyuk, Svertilov Sergei, Robert Holzworth |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250121686
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| Publikation (Nr.) |
 EGU/EGU2016-496.pdf |
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| Zusammenfassung |
| The steady self-contained classification of events such as sprites, elves, blue jets emerged for
the period of transient luminous events (TLE) observation. In accordance with TLE origin
theories the presence of the thunderstorm region where the lightnings with the large peak
current generating in is necessary. However, some far-from-thunderstorm region events were
also detected and revealed to us another TLE generating mechanisms. For the discovering of
the TLE nature the Universitetsky-Tatiana-2 and Vernov satellites were equipped with
ultraviolet (240-400 nm) and red-infrared ( >610 nm) detectors. In both detector it was
carried out regardless the lightnings with the guidance by the flashes in the UV wavelength
where lightning’s emitting is quite faint. The lowered threshold on the Vernov satellite
allowed to select the great amount of TLE with the numerous far-from-thunderstorm region
events examples. such events were not conjuncted with lightning activity measured by
global lightning location network (WWLLN) on the large area of approximately
107 km2 for 30 minutes before and after the time of registration. The characteristic
features of this type of event are: the absence of significant signal in the red-infrared
detector’s channel; a relatively small number of photons (less than 5 ⋅ 1021). A
large number of without lightning flash were detected at high latitudes over the
ocean (30∘S – 60∘S). Lightning activity in the magnetic conjugate point also was
analyzed. The relationship of far-from-thunderstorm region events with the specific
lightning discharges didn’t confirmed. Far-from-thunderstorm events - a new type of
transient phenomena in the upper atmosphere is not associated with the thunderstorm
activity. The mechanism of such discharges is not clear, though it was accumulated a
sufficient amount of experimental facts of the existence of such flashes. According
to the data of Vernov satellite the temporal profile, duration, location with earth
coordinates and the number of photons generated in the far-from-thunderstorm
atmospheric events has been analyzed and the discussion of these events origin is in
progress. |
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