Some features of lightning ground flash activities observed in tropical thunderstorms

Sonnadara, D.U.J.; Weerasekara, A.B.; Fernando, I.M.K.; Lelwala, R.; Jayaratne, K.P.S.C.; Namasivayam, S.; Bandara, K.R.A.; Gomes, C.; Ariyaratna, T.R.

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dc.contributor.author	Sonnadara, D.U.J.
dc.contributor.author	Weerasekara, A.B.
dc.contributor.author	Fernando, I.M.K.
dc.contributor.author	Lelwala, R.
dc.contributor.author	Jayaratne, K.P.S.C.
dc.contributor.author	Namasivayam, S.
dc.contributor.author	Bandara, K.R.A.
dc.contributor.author	Gomes, C.
dc.contributor.author	Ariyaratna, T.R.
dc.date.accessioned	2012-12-19T08:15:21Z
dc.date.available	2012-12-19T08:15:21Z
dc.date.issued	1999
dc.identifier.citation	Proceedings of the Annual Sessions, SLAAS, 55 (1999) E1-07	en_US
dc.identifier.uri	http://archive.cmb.ac.lk:8080/xmlui/handle/70130/3281
dc.description.abstract	Some features of lightning ground flash activities in tropical thunderstorms (Sri Lanka) were studied with information provided by two lightning direction finding (DF) stations installed at Colombo (79.84 E, 6.93 N) and Ratnapura (80.43 E, 6.64 N). A total of 980 lightning ground flashes recorded in February 1999 during the inter-monsoon period were used in this analysis. The striking rate of ground flashes per hour was found to be varying from 7 to 134 with the mean of 61. The mean number of strokes per flash for negative and positive ground flashes was 3.0 and 1.2 respectively. 73% of negative ground flashes had more than one stroke per flash whereas 8.2% of positive ground flashes had more than one stroke per flash. The percentage of positive ground flashes is 6.2% of the total number of flashes.	en_US
dc.language.iso	en	en_US
dc.subject	Could to ground lightning	en_US
dc.title	Some features of lightning ground flash activities observed in tropical thunderstorms	en_US
dc.type	Research paper	en_US