Numerical Modeling of Lightning, Blue Jets, and Gigantic Jets - Couverture souple

Riousset, Jérémy

 
9783848407200: Numerical Modeling of Lightning, Blue Jets, and Gigantic Jets
Couverture souple
ISBN 10 : 3848407205 ISBN 13 : 9783848407200
Editeur : LAP LAMBERT Academic Publishing, 2012

Synopsis

Blue jets and gigantic jets are transient luminous events in the middle atmosphere that form when conventional lightning leaders escape upward from thundercloud tops and propagate toward the lower ionosphere. Petrov and Petrova [1999] first expressed that jets could be the extension of classic lightning discharges initiated within the cloud boundaries. This dissertation demonstrates the fundamental physical similarities between the various electrical discharges known to occur in the thundercloud due to local and global charge imbalances. How charge imbalances form in the thundercloud has been first suggested by Wilson [1921], but their impact on the occurrence of blue and gigantic jets was not explored. This work shows that the accumulation of screening charges near the thundercloud top produces a charge configuration leading to the initiation of blue jets, and the effective mixing of these charges with the upper thundercloud charge to that of gigantic jets. Also, the physics of lightning and jets, and many of the small-scale features observed in jets can be interpreted in terms of streamers (needle-shaped filaments of ionization), and are further explored via numerical modeling.

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Présentation de l'éditeur

Blue jets and gigantic jets are transient luminous events in the middle atmosphere that form when conventional lightning leaders escape upward from thundercloud tops and propagate toward the lower ionosphere. Petrov and Petrova [1999] first expressed that jets could be the extension of classic lightning discharges initiated within the cloud boundaries. This dissertation demonstrates the fundamental physical similarities between the various electrical discharges known to occur in the thundercloud due to local and global charge imbalances. How charge imbalances form in the thundercloud has been first suggested by Wilson [1921], but their impact on the occurrence of blue and gigantic jets was not explored. This work shows that the accumulation of screening charges near the thundercloud top produces a charge configuration leading to the initiation of blue jets, and the effective mixing of these charges with the upper thundercloud charge to that of gigantic jets. Also, the physics of lightning and jets, and many of the small-scale features observed in jets can be interpreted in terms of streamers (needle-shaped filaments of ionization), and are further explored via numerical modeling.

Biographie de l'auteur

Dr. Jérémy A Riousset received a "Diplome d'Ingenieur" (equivalent to a MEng in Engineering Sciences) from the Ecole Centrale de Lyon, Ecully, France, and MS and PhD in Electrical Engineering from the Pennsylvania State University, University Park, PA. He is currently a postdoctoral fellow at the Georgia Institute of Technology, Atlanta, GA.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2012
Langue
anglais
ISBN 10 
3848407205
ISBN 13 
9783848407200
Reliure
Broché
Nombre de pages
220
Coordonnées du fabricant
non disponible
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