Day-To Variability of the Ionosphere: Model-Data Comparison Experiments Using Time-Gcm

Details Day-To Variability of the Ionosphere: Model-Data Comparison Experiments Using Time-Gcm Day-To Variability of the Ionosphere: Model-Data Comparison Experiments Using Time-Gcm

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa42a..03m&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SA42A-03

Physics

2427 Ionosphere/Atmosphere Interactions (0335), 2435 Ionospheric Disturbances, 2437 Ionospheric Dynamics, 2736 Magnetosphere/Ionosphere Interactions (2431), 3369 Thermospheric Dynamics (0358)

Scientific paper

We report on a new series of TIME-GCM model runs for the year 2002 that use updated aeronomic parameters and processes that lead to a better portrayal of long-term variability patters (seasonal and annual). Within this context, we then explore the sources of day-to-day ionospheric variability. Separate model runs employ coupling from above (daily solar and geomagnetic forcings) in conjunction with (and without) day-to-day coupling from below via the NCEP formulation. We compare model output for the F2-layer with data from several ionosonde stations to assess how simulations capture true daily variability at locations ranging from sub-auroral to lower mid-latitudes. Of particular interest are the days each month when geomagnetic activity is lowest, and thus when coupling from below might be most visible.

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