Connection between Tropospheric Activities and Ionospheric behaviors Simulated by a Whole Atmosphere-Ionosphere Coupled Model

Details Connection between Tropospheric Activities and Ionospheric behaviors Simulated by a Whole Atmosphere-Ionosphere Coupled Model Connection between Tropospheric Activities and Ionospheric behaviors Simulated by a Whole Atmosphere-Ionosphere Coupled Model

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa22a..04j&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA22A-04

Mathematics

Logic

[2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2447] Ionosphere / Modeling And Forecasting, [3369] Atmospheric Processes / Thermospheric Dynamics, [3389] Atmospheric Processes / Tides And Planetary Waves

Scientific paper

In This talk, we will introduce an Earth’s atmosphere-ionosphere coupled model which treats seamlessly the neutral atmospheric region from the troposphere to the thermosphere as well as the thermosphere-ionosphere interaction including the electrodynamics self-consistently. The model is especially useful for the study of vertical connection between the meteorological phenomena and the upper atmospheric behaviors. As an initial simulation using the coupled model, we have carried out a 30-day consecutive run in September. The result reveals that the longitudinal structure of F-region ionosphere varies on day-to-day basis in a highly complex way, and that a clear 4-peak structure of daytime equatorial ionization anomaly (EIA) similar to the recent observations appears as an averaged feature. The simulation reproduces and thus confirms the vertical coupling processes proposed so far with respect to the formation of averaged EIA longitudinal structure, including from the excitation of solar nonmigrating tides in the tropospheric moist convection activity to tidal modulation of ionospheric dynamo electric field which in turn affects EIA generation. The simulation result indicates that not only the ionospheric averaged longitudinal structure but the day-to-day variation can be modulated significantly by the lower atmospheric effect.

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