2024-03-29T00:48:10Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00019648
2023-01-26T05:09:48Z
879:1183:1640:1710
ON THE CLOUD DISCHARGE PRECEDING THE FIRST GROUND STROKE
TAKEUTI, TOSIO
57386
ISIKAWA, HARUZI
57387
TAKAGI, MASUMI
57388
1960-03-25
As to the beginning stage of a ground discharge, the following facts have been obtained by a field meter with the aid of a radio receiver and a flash intensity recorder. About 50% of the ground discharges are preceded by a "pre-preliminary discharge" which occurs within 500 ms before the first ground stroke, so the discharge precedes also "the preliminary discharge" which is named by Clarence and Malan "the B I L change". The term "B I L" is used in this paper to avoid confusion of the preliminary with the pre-preliminary. In some thunderclouds the greater part of the first ground stroke is preceded by the pre-preliminary discharge, however, in others, the strokes are preceded only by the B I L discharge. On the average the ground discharge preceded by the pre preliminary discharge have fewer ground strokes than those preceded only by the B I L discharge, so, the pre-preliminary discharge must neutralize the negative charge concerning the ground stroke. The relation between the pre-preliminary discharge and the B I L discharge is not obvious at this stage.
departmental bulletin paper
The Research Institute of Atmospherics, Nagoya University
1960-03-25
Proceedings of the Research Institute of Atmospherics, Nagoya University
7
1
6
http://hdl.handle.net/2237/21696
0077-264X
eng