HR: 0800h
AN: AE31A-0034 [Abstracts]
TI: Modeling Transient and Quasi-stationary Electric Fields in a Thundercloud
AU: * Davydenko, S S
EM: davyd@appl.sci-nnov.ru
AF: Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanova str., Nizhny
Novgorod, 603950, Russian Federation
AU: Mareev, E A
EM: mareev@appl.sci-nnov.ru
AF: Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanova str., Nizhny
Novgorod, 603950, Russian Federation
AU: Sergeev, A S
EM: sergeev@appl.sci-nnov.ru
AF: Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanova str., Nizhny
Novgorod, 603950, Russian Federation
AU: Marshall, T C
EM: marshall@olemiss.edu
AF: University of Mississippi, Department of Physics and Astronomy, University, MS 38677,
United States
AU: Stolzenburg, M
EM: mstolzen@olemiss.edu
AF: University of Mississippi, Department of Physics and Astronomy, University, MS 38677,
United States
AB:
A numerical model describing the stationary and transient electric fields in thunderclouds is developed. The
stationary electric structure of the storm is modeled as a set of horizontal layers of the external current in
accordance of the balloon measurements of the electric field profile. The lightning flashes are modeled as a
short time currents producing dipole charge structure in the thundercloud in the case of intracloud flash and
monopole charge region in the case of cloud to ground flash. The relaxation of the flash charge is described. The
model gives the total current flowing from the storm top to the ionosphere and estimates the transient charge
transfer to the ionosphere for different flash types. Dependence of the charge transfer on the parameters of the
flash and the conductivity modification in the vicinity of the storm is considered. Using the balloon measurements
of the electric field through a number of MCS stratiform precipitation regions their electric structure and
parameters are modeled.
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
DE: 3367 Theoretical modeling
SC: Atmospheric and Space Electricity [AE]
MN: 2007 Fall Meeting