Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1777663 | Journal of Atmospheric and Solar-Terrestrial Physics | 2009 | 5 Pages |
Abstract
We report synchronized optical observations of sprites in Israel during the winters of 2006/7-2007/8. Based on several events, we suggest that the elements of columniform sprites are organized in spaced intervals on the circumference of a circle centered directly above, or a little offset, to the vertical direction from the parent lightning. In 2D images most of the cases show columns to be arranged in highly eccentric elliptical forms or in straight rows. The analysis of the optical images provided the geometrical dimensions of the columns and their spatial organization. We used an electrostatic model of the QE field with reasonable assumptions on the location and magnitude of the cloud charge center, constrained by ELF evaluation of the Charge Moment Change in the parent flash, to show that the observed diameter of the columnar arrangement closely matches the conventional breakdown field line contour at the same altitude.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
Elyakom Vadislavsky, Yoav Yair, Carynelisa Erlick, Colin Price, Eran Greenberg, Roy Yaniv, Baruch Ziv, NÃ ama Reicher, Adam Devir,