Leader: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">( | <div class="definition"><div class="short_definition">(''Or'' leader streamer.) The [[electric discharge]] that initiates each [[return stroke]] in a cloud- to-ground [[lightning discharge]].</div><br/> <div class="paragraph">It is a channel of high ionization that propagates through the air by virtue of the electric [[breakdown]] at its front produced by the charge it lowers. The [[stepped leader]] initiates the first [[stroke]] in a [[cloud-to-ground flash]] and establishes the channel for most subsequent strokes of a lightning discharge. The [[dart leader]] initiates most subsequent strokes. Dart-stepped leaders begin as dart leaders and end as stepped leaders. The initiating processes in [[cloud]] discharges are sometimes also called leaders but their properties are not well measured.</div><br/> </div> | ||
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Latest revision as of 15:34, 20 February 2012
leader
(Or leader streamer.) The electric discharge that initiates each return stroke in a cloud- to-ground lightning discharge.
It is a channel of high ionization that propagates through the air by virtue of the electric breakdown at its front produced by the charge it lowers. The stepped leader initiates the first stroke in a cloud-to-ground flash and establishes the channel for most subsequent strokes of a lightning discharge. The dart leader initiates most subsequent strokes. Dart-stepped leaders begin as dart leaders and end as stepped leaders. The initiating processes in cloud discharges are sometimes also called leaders but their properties are not well measured.
