HR: 0800h
AN: AE31A-0035    [Abstracts]
TI: Transient Currents in the Global Electric Circuit due to CG and IC Lightning
AU: * Maggio, C
EM: crmaggio@olemiss.edu
AF: The University of Mississippi, Department of Physics and Astronomy, 108 Lewis Hall, University, MS 38677, United States
AU: Marshall, T
EM: marshall@phy.olemiss.edu
AF: The University of Mississippi, Department of Physics and Astronomy, 108 Lewis Hall, University, MS 38677, United States
AU: Stolzenburg, M
EM: mstolzen@phy.olemiss.edu
AF: The University of Mississippi, Department of Physics and Astronomy, 108 Lewis Hall, University, MS 38677, United States
AU: Krehbiel, P
EM: krehbiel@ibis.nmt.edu
AF: Langmuir Laboratory for Atmospheric Research, New Mexico Institute of Mining and Technology, Socorro, NM 87801, United States
AU: Rison, W
EM: rison@ee.nmt.edu
AF: Langmuir Laboratory for Atmospheric Research, New Mexico Institute of Mining and Technology, Socorro, NM 87801, United States
AU: Thomas, R
EM: thomas@ee.nmt.edu
AF: Langmuir Laboratory for Atmospheric Research, New Mexico Institute of Mining and Technology, Socorro, NM 87801, United States
AU: Mareev, E
AF: Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St, Nizhny Novgorod, MS 603950, Russian Federation
AU: Davydenko, S
AF: Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St, Nizhny Novgorod, MS 603950, Russian Federation
AU: Yashunin, S
AF: Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St, Nizhny Novgorod, MS 603950, Russian Federation
AU: Hamlin, T
EM: thamlin@lanl.gov
AF: Space & Remote Sensing, Los Alamos National Laboratory, Los Alamos, NM 87544, United States
AB: Intracloud (IC) and cloud-to-ground (CG) lightning flashes produce transient changes in the electric field (E) above a thundercloud, and this E produces a transient current in the global electric circuit. In a previous presentation, an electodynamic model simulation was developed and used to estimate the charge transferred between cloud top and the ionosphere by the above-cloud transient E resulting from a single CG lightning flash. An alternative model to estimate above-cloud charge transfers has recently been developed, and this new model is applied to a larger group of both CG and IC flashes. For example, two CG flashes moved -11 C and -12 C of charge between cloud and ground and +7 C and +5 C upward from the cloudtop. Two IC flashes that moved 85 C and 62 C inside the cloud caused -7 C and -8 C to move upward from the cloudtop. The results of the two models will be compared to one another. The main goal of this presentation is to show that above-cloud transient currents resulting from lightning may play an important role in the global electric circuit.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 1600 GLOBAL CHANGE
DE: 3300 ATMOSPHERIC PROCESSES
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
SC: Atmospheric and Space Electricity [AE]
MN: 2007 Fall Meeting