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

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

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa33b1322f&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA33B-1322

Physics

6999 General Or Miscellaneous, 7959 Models

Scientific paper

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, ¡µH, 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 ¡µH in the Peruvian (75¢XW) and Philippine (120¢XE) sectors, and the relation of ¡µH to the ionospheric vertical drift velocity, are presented in this paper. Agreement between simulated and observed magnitudes of ¡µH is improved by modifying the standard daytime E region photochemistry in the TIE-GCM in order to better simulate observed E region electron densities.

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