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| Titel |
Lightning flash multiplicity in eastern Mediterranean thunderstorms |
| VerfasserIn |
Y. Yair, S. Shalev, Z. Erlich, A. Agrachov, E. Katz, H. Saaroni, C. Price, B. Ziv |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 2 ; Nr. 14, no. 2 (2014-02-03), S.165-173 |
| Datensatznummer |
250118267
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| Publikation (Nr.) |
 copernicus.org/nhess-14-165-2014.pdf |
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| Zusammenfassung |
| Cloud-to-ground lightning flashes usually consist of one or several strokes
coming in very short temporal succession and close spatial proximity. A
commonly used method for converting stroke data into flashes is using the
National Lightning Detection Network (NLDN) thresholds of maximum temporal
separation of 0.5 s and maximum lateral distance of 10 km radius between
successive strokes. In the present study, we tested a location-based
algorithm with several spatial and temporal ranges, and analyzed stroke data
obtained by the Israel Lightning Location System (ILLS) during one year
(1.8.2009–31.7.2010). We computed the multiplicity, the percentage of single
stroke flashes and the geographical distribution of average multiplicity
values for thunderstorms in the Eastern Mediterranean region. Results show
that for the NLDN thresholds, the percentage of single stroke flashes in
Israel was 37% and the average multiplicity was 1.7. We reanalyzed the
data with a spatial range that equals twice the ILLS location error and
shorter times. For the new thresholds of maximum distance of 2.5 km and
maximum allowed temporal separation of 0.2 s we find that the mean
multiplicity of negative CGs is lowered to 1.4 and find a percentage of
58% of single stroke flashes. A unique severe storm from 30 October 2009
is analyzed and compared with the annual average of 2009/2010, showing that
large deviations from the mean values can occur in specific events. |
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