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| Titel |
Urban effect on the characteristics of cloud-to-groundlightning over Belo Horizonte-Brazil |
| VerfasserIn |
I. R. C. A. Pinto, O. Pinto, M. A. S. S. Gomes, N. J. Ferreira |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 2 ; Nr. 22, no. 2 (2004-01-01), S.697-700 |
| Datensatznummer |
250014793
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| Publikation (Nr.) |
 copernicus.org/angeo-22-697-2004.pdf |
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| Zusammenfassung |
An 8-year climatological analysis (1989–1996) of lightning network data over
Belo Horizonte, a large city located in Southeastern Brazil, and nearby surrounding
areas has indicated a significant enhancement of approximately 100% in the negative
flash density and of 50% in the positive flash density over and downwind of the city,
compared with the other adjacent areas. A decrease of 25% in the percentage of positive
flashes was also observed over and downwind of the city. No urban effect was evident in the
peak current of both negative and positive flashes. These results are in agreement with
the recent results obtained by Steiger et al. (2002) for Houston, except that the
strength of the effect is twice larger than in Houston. The reason for this
difference is not clear.
Key words. Meteorology and atmospheric dynamics (atmospheric
electricity; convective processes; lightning) |
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