Model Simulation of the Equatorial Electrojet in the Peruvian and Philippine Sectors

HR: 1340h
AN: SA33B-1322 [Abstracts]
TI: Model Simulation of the Equatorial Electrojet in the Peruvian and Philippine Sectors
AU: * Fang, T
EM: twfang@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
AU: * Fang, T
EM: twfang@ucar.edu
AF: Institute of Space Science, National Central University, No.300, Joongda Rd, Jhongli City, 32001, Taiwan
AU: Richmond, A
EM: richmond@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
AU: Liu, J
EM: jyliu@jupiter.ss.ncu.edu.tw
AF: Institute of Space Science, National Central University, No.300, Joongda Rd, Jhongli City, 32001, Taiwan
AU: Maute, A
EM: maute@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
AU: Lin, C
EM: clin@nspo.org.tw
AF: National Space Organization, 8F, 9 Prosperity 1st Road, Hsinchu Science Park, HsinChu, 300, Taiwan
AU: Chen, C
EM: koichi0925@gmail.com
AF: Institute of Space Science, National Central University, No.300, Joongda Rd, Jhongli City, 32001, Taiwan
AU: Harper, B
EM: bret.harper@gmail.com
AF: Energy and Resources Group, University of California, Berkeley, 310 Barrows Hall, University of California, Berkeley, CA 94720, United States
AB: Between 100 and 120 km above the Earth's magnetic equator, the equatorial electrojet (EEJ) flows as an enhanced eastward current in the daytime E region ionosphere which can induce a magnetic perturbation on the ground. Calculating the difference between the horizontal components of magnetic perturbation at magnetometers near the equator and about 6-9 degrees away from equator, △H, provides us information about the strength of the EEJ. The NCAR Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIE- GCM) is capable of simulating the EEJ current and its magnetic perturbation on the ground. The simulated diurnal, seasonal (March equinox, June solstice, December solstice), and solar activity (F10.7 = 80, 140 and 200) variations of △H in the Peruvian (75°W) and Philippine (120°E) sectors, and the relation of △H to the ionospheric vertical drift velocity, are presented in this paper. Agreement between simulated and observed magnitudes of △H is improved by modifying the standard daytime E region photochemistry in the TIE-GCM in order to better simulate observed E region electron densities.
DE: 6999 General or miscellaneous
DE: 7959 Models
SC: SPA-Aeronomy [SA]
MN: 2007 Fall Meeting