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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. Proceedings of the Research Institute of Atmospherics, Nagoya University
  4. 5

ON THE LEADER WAVEFORMS OF ATMOSPHERICS NEAR THE ORIGINS

http://hdl.handle.net/2237/21627
http://hdl.handle.net/2237/21627
c0a9ee45-3c59-4821-aa74-e235c9d74ca8
名前 / ファイル ライセンス アクション
Vol5-1.pdf Vol5-1.pdf (2.4 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2015-04-20
タイトル
タイトル ON THE LEADER WAVEFORMS OF ATMOSPHERICS NEAR THE ORIGINS
言語 en
著者 ISIKAWA, HARUZI

× ISIKAWA, HARUZI

WEKO 57177

en ISIKAWA, HARUZI

Search repository
TAKAGI, MASUMI

× TAKAGI, MASUMI

WEKO 57178

en TAKAGI, MASUMI

Search repository
TAKEUTI, TOSIO

× TAKEUTI, TOSIO

WEKO 57179

en TAKEUTI, TOSIO

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 The authors have adopted the discontinuous method of recording the atmospheric waveforms, in which each waveform, singly swept on the screen of respective C. R. T., is photographed in the respective frame of 35 mm cine film. These techniques have made it possible to perform an uninterrupted recording of waveforms throughout the period of a thunderstorm often lasting more than several hours, and to deduce statistically more general features common to a certain type of lightning discharges than the continuous method of recording can do. Following these views the authors have made a statistical analysis of waveforms obtained under thunderstom conditions. It has been made clear through the present analysis that: (1) Almost 80% of the recorded stepped leaders preceeding ground discharges has been found to be β type, and this situation has not been changed through two years' observations. (2) Positive space charges presumed to exist at the thundercloud base really activate the formation of β type leaders, neverthless, α type leaders can often be produced even in such cases, where a clear evidence exists that a strong positive space charge centre is present at the cloud base. (3) The nature of the initial portion of a stepped leader is the same for both these two types, and the time interval values between two successive pulses in this portion clearly reduce from larger values, more than 100 μs, to normal values, roughly 50 μs, when the leader steps out of cloud base and develops in the gap between cloud and ground. (4) In some cases a β type leader, followed by a return stroke, produces a train of small pulsations in its final few ms, just before the return stroke appears. The mean time-interval, roughly 20 μs, of these pulsations is clearly smaller than the normal value between step streamers. It is not clear at present whether each of these final pulsations is produced by a step streamer appearing in the last stage of leader development, as the Boys' camera photopraph of a typical a type stepped leader does not represents any reduction of step intervals throughout the final stage of it at all.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 The Research Institute of Atmospherics, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0077-264X
書誌情報 en : Proceedings of the Research Institute of Atmospherics, Nagoya University

巻 5, p. 1-11, 発行日 1958-03-25
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/21627
識別子タイプ HDL
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