HR: 09:45h
AN: SM11B-07    [Abstracts]
TI: Modeling the dynamic plasmapause and plasmaspheric refilling
AU: * Maruyama, N
EM: naomi@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Richmond, A D
EM: richmond@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Lin, C
EM: clin@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Sazykin, S
EM: sazykin@rice.edu
AF: Physics and Astronomy Department, Rice University, 6100 South Main St., Houston, TX 77005 United States
AU: Fuller-Rowell, T J
EM: Tim.Fuller-Rowell@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University Of Colorado and Space Environment Center, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Millward, G
EM: george@apl.ucl.ac.uk
AF: Atmospheric Physics Laboratory, University College London, 67-73 Riding House Street, London, W1W 7EJ United Kingdom
AU: Bailey, G J
EM: G.Bailey@sheffield.ac.uk
AF: Department of Applied Mathematics, The University of Sheffield, Hounsfield Road, Sheffield, S3 7RH United Kingdom
AB: We have developed a new model that includes both plasmaspheric refilling and the evolution of the plasmapause. The model self-consistently solves the temporal variation of plasma distribution from the ionosphere within the dynamic plasmapause. In the saturated plasmasphere, we found good agreement between the model and previous measurements of electron densities. Furthermore, by imposing a realistic electric potential and depleted flux tubes, the model demonstrates the evolution of a sharp gradient in the plasma density distribution, such as seen at the plasmapause. The model results indicate that the equatorial density profile depends on the degree of flux tube depletion. In this presentation, a detailed analysis of the plasmapause evolution process will be discussed. We will address the impact of the dynamic plasmapause on the refilling time scale, demonstrating the dynamical plasma coupling between plasmasphere and ionosphere.
DE: 2431 Ionosphere/magnetosphere interactions (2736)
DE: 2736 Magnetosphere/ionosphere interactions
DE: 2753 Numerical modeling
DE: 2768 Plasmasphere
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting