Preprint Article Version 1 This version is not peer-reviewed

Features of K-Changes Observed in Sri Lanka in the Tropics

Version 1 : Received: 14 April 2018 / Approved: 16 April 2018 / Online: 16 April 2018 (08:11:25 CEST)

How to cite: Nanayakkara, S.; Fernando, M.; Cooray, V. Features of K-Changes Observed in Sri Lanka in the Tropics. Preprints 2018, 2018040195 (doi: 10.20944/preprints201804.0195.v1). Nanayakkara, S.; Fernando, M.; Cooray, V. Features of K-Changes Observed in Sri Lanka in the Tropics. Preprints 2018, 2018040195 (doi: 10.20944/preprints201804.0195.v1).

Abstract

General characteristics of K changes together with their fine structure associated with ground flashes in Sri Lanka in the tropics are presented. It is found that on average there are about 2 K changes associated with each return stroke. Analysis of the fine structure of the K changes shows that the K change is a chaotic pulse burst. Some of these chaotic pulse bursts start and the others end as a regular pulse bursts. Sometimes the chaotic part occurs in between two regular pulse bursts. This is in agreement with the recent published results that claim that chaotic pulse bursts are a random superposition of regular pulse bursts. The results show that the small step fields identified in the literature as K changes are the static fields associated with these pulse bursts.

Subject Areas

lightning flash; return stroke; K change; chaotic pulse train; regular pulse train

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