HR: 1340h
AN: SM13A-0330    [Abstracts]
TI: A Data Assimilation Model of the Storm-time Ring Current
AU: * Nakano, S
EM: shiny@ism.ac.jp
AF: The Institute of Statistical Mathematics, 4-6-7 Minami-Azabu, Minato-ku, Tokyo, 106-8569 Japan
AU: * Nakano, S
EM: shiny@ism.ac.jp
AF: Japan Science and Technology Agency, 4-1-8 Hommach, Kawaguchi, 332-0012 Japan
AU: Ueno, G
EM: gen@ism.ac.jp
AF: The Institute of Statistical Mathematics, 4-6-7 Minami-Azabu, Minato-ku, Tokyo, 106-8569 Japan
AU: Ueno, G
EM: gen@ism.ac.jp
AF: Japan Science and Technology Agency, 4-1-8 Hommach, Kawaguchi, 332-0012 Japan
AU: Ebihara, Y
EM: ebihara@nipr.ac.jp
AF: National Institute of Polar Research, 1-9-10 Kaga, Itabashi-ku, Tokyo, 173-8515 Japan
AU: Fok, M
EM: mei-ching.h.fok@nasa.gov
AF: NASA Goddard Space Flight Center, Code 612.2, Building 21, Room 248, Greenbelt, MD 20771 United States
AU: Ohtani, S
EM: Shin.Ohtani@jhuapl.edu
AF: The Johns Hopkins University, Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723-6099 United States
AU: Brandt, P C
EM: pontus.brandt@jhuapl.edu
AF: The Johns Hopkins University, Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723-6099 United States
AU: Higuchi, T
EM: higuchi@ism.ac.jp
AF: The Institute of Statistical Mathematics, 4-6-7 Minami-Azabu, Minato-ku, Tokyo, 106-8569 Japan
AU: Higuchi, T
EM: higuchi@ism.ac.jp
AF: Japan Science and Technology Agency, 4-1-8 Hommach, Kawaguchi, 332-0012 Japan
AB: Data assimilation techniques are successfully applied to atmospheric physics, physical oceanography, and ionospheric physics. There have been few attempts to model the magnetosphere with data assimilation technique mainly because of poor observational coverage. However, recent progress of observation system enables us to obtain global data of the magnetosphere with sufficient spatial coverage and time resolution. In particular, the IMAGE satellite obtains global images of the energetic neutral atom (ENA), which serve as a useful constraint on magnetospheric models. In this study, series of the IMAGE/HENA data are assimilated into a kinetic ring current model by using an ensemble-based non-linear filtering technique. We will show results that provide vital information for understanding the temporal and spatial variations of the storm-time ring current.
DE: 2730 Magnetosphere: inner
DE: 2753 Numerical modeling
DE: 2778 Ring current
DE: 2788 Magnetic storms and substorms (7954)
DE: 3315 Data assimilation
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005