HR: 10:50h
AN: SA42A-03    [Abstracts]
TI: DAY-TO-DAY VARIABILITY OF THE IONOSPHERE: MODEL-DATA COMPARISON EXPERIMENTS USING TIME-GCM
AU: * Mendillo, M
EM: mendillo@bu.edu
AF: Boston University, Center for Space Physics, 725 Commonwealth Avenue, Boston, MA 02215, United States
AU: Roble, R
EM: roble@hao.ucar.edu
AF: NCAR-HAO, 1850 Table Mesa Drive, Boulder, CO 80302, United States
AU: Wroten, J
EM: jwroten@bu.edu
AF: Boston University, Center for Space Physics, 725 Commonwealth Avenue, Boston, MA 02215, United States
AU: Rishbeth, H
EM: hr@phys.soton.ac.uk
AF: Boston University, Center for Space Physics, 725 Commonwealth Avenue, Boston, MA 02215, United States
AU: Rishbeth, H
EM: hr@phys.soton.ac.uk
AF: School of Physics and Astronomy University of Southampton, Highfield, Southampton, SO17 1BJ, United Kingdom
AB: 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.
DE: 2427 Ionosphere/atmosphere interactions (0335)
DE: 2435 Ionospheric disturbances
DE: 2437 Ionospheric dynamics
DE: 2736 Magnetosphere/ionosphere interactions (2431)
DE: 3369 Thermospheric dynamics (0358)
SC: SPA-Aeronomy [SA]
MN: 2007 Joint Assembly