HR: 0800h
AN: AE31A-0037 INVITED    [Abstracts]
TI: ELF Q-bursts from African Squall Lines
AU: * Hobara, Y
EM: y.hobara@sheffield.ac.uk
AF: Department of Automatic Control and Systems Engineering, The University of Sheffield, Mappin Street, Sheffield, S1 3JD, United Kingdom
AU: Williams, E
EM: earlew@ll.mit.edu
AF: Parsons Laboratory, Massachusetts Institute of Technology, 48-319, Cambridge, MA 02139, United States
AU: Mushtak, V
EM: vadimcm@ieee.org
AF: Parsons Laboratory, Massachusetts Institute of Technology, 48-319, Cambridge, MA 02139, United States
AU: Boldi, R
EM: boldi@nsstc.uah.edu
AF: Earth System Science Center, University of Alabama, Huntsville, AL 35899, United States
AU: Hayakawa, M
EM: hayakawa@whistler.ee.uec.ac.jp
AF: The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, 182-8585, Japan
AU: Yamashita, K
EM: yamashita@whistler.ee.uec.ac.jp
AF: The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, 182-8585, Japan
AU: Lyons, W
EM: walyons@frii.com
AF: FMA Research, Inc., 46050 Weld County Road 13, Fort Collins, CO 80524, United States
AU: Russell, B
EM: bbrussel@gmail.com
AF: University of Michigan, 2455 Hayward St, Ann Arbor, MI 48109, United States
AU: Satori, G
EM: satori@ggki.hu
AF: GGRI,Hungarian Academy of Sciences, Csatkai u. 6-8, Sopron, H-9400, Hungary
AU: Bor, J
EM: jbor@ggki.hu
AF: GGRI,Hungarian Academy of Sciences, Csatkai u. 6-8, Sopron, H-9400, Hungary
AU: Price, C
AF: Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel
AU: Greenberg, E
EM: erangree@post.tau.ac.il
AF: Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel
AU: Holzworth, R
EM: bobholz@washington.edu
AF: University of Washington, Johnson Hall, Seattle, WA 98195, United States
AB: A number of large amplitude ELF transient signals (Q-bursts) are documented at multiple sites around the world (Japan, Hungary, Israel and USA) in association with westward moving mesoscale convective systems (MCSs) in West Africa during the African Monsoon and Multidisciplinary Analysis campaign in 2006. Some of these bursts are associated with red sprites first observed from ground-based measurement in Africa. Using MIT Doppler radar and electric field measurements locally installed in Niamey, we investigate quantitatively the meteorological conditions responsible for generating these exceptionally large Q-bursts. Detailed meteorological information is provided from radar such as the spatio-temporal evolution of radar echo, while the electrical properties oflarge Q-bursts (e.g. charge moment charge (CMC)) are experimentally derived by using the remote-sensing method taking into account the theory for the earth-ionoshere wave guide. Furthermore, detailed propagation characteristics of Q-bursts and their effect on the location and remotely derived accuracy of the CMC will be discussed by comparing the results from multi ELF stations under different ionospheric conditions such as day-night asymmetry and the ionospheric terminator lines. Preliminary results from similar campaign in 2007 in Niger will also be presented to be compared with those in 2006.
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
DE: 3329 Mesoscale meteorology
DE: 6964 Radio wave propagation
DE: 6969 Remote sensing
SC: Atmospheric and Space Electricity [AE]
MN: 2007 Fall Meeting