HR: 0800h
AN: AE31A-0160    [Abstracts]
TI: Heating and luminous emission of upper atmosphere due to an applied DC E-field
AU: * Kuo, C
EM: johnny@phys.ncku.edu.tw
AF: Physics Department, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AU: Hsu, R
EM: rrhsu@phys.ncku.edu.tw
AF: Physics Department, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AU: Lee, L
EM: loulee@narl.org.tw
AF: Physics Department, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AU: Su, H
EM: htsu@phys.ncku.edu.tw
AF: Physics Department, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AU: Chen, A
EM: alfred@phys.ncku.edu.tw
AF: Physics Department, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AU: Mende, S
EM: mende@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Way, Berkeley, CA 94720-7450 United States
AU: Frey, H
EM: frey@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Way, Berkeley, CA 94720-7450 United States
AU: Fukunishi, H
EM: fuku@pat.geophys.tohoku.ac.jp
AF: Department of Geophysics, Tohoku University, Aramaki-aza-aoba, Aoba-ku, Sendai, Miy 980-8578 Japan
AU: Takahashi, Y
EM: yukihiro@pat.geophys.tohoku.ac.jp
AF: Department of Geophysics, Tohoku University, Aramaki-aza-aoba, Aoba-ku, Sendai, Miy 980-8578 Japan
AB: TLEs are transient and luminous events occurring between thunderstorm top and the lower ionosphere. The optical emission typically lasts for several milliseconds and is from the radiative emission of excited air molecules (mostly nitrogen and oxygen). The excitation of air molecules is due to the residual electric field above thundercloud that accelerates electrons and the resultant inelastic collisions of the accelerating electrons with molecules. Based on a Boltzmann-type distribution of electron energy, heating and luminous emission of air molecules in an applied DC electric filed was computed. The computed quantities are further compared with the electron-swarm properties of air, and the average electron energy as well as the strength of the causative electric field deduced from the TLE events observed by ROCSAT-2 ISUAL and by the 2004 Taiwan TLEs campaign. * Works performed at National Cheng Kung University were supported in part by grants from NSPO (93-NSPO(B)-ISUAL-FA09-01) and NSC (NSC93-2112-M-006-007, NSC93-2111-M-006-001) in Taiwan.
DE: 3324 Lightning
DE: 3337 Numerical modeling and data assimilation
DE: 3367 Theoretical modeling
DE: 3304 Atmospheric electricity
SC: Atmospheric and Space Electricity [AE]
MN: 2004 AGU Fall Meeting