HR: 1340h
AN: SM13B-1222    [Abstracts]
TI: Quiet-time mass and energy transport in GUMICS-4 global MHD simulation, 1: Locations and solar wind control of magnetopause entry sites
AU: * Palmroth, M
EM: minna.palmroth@fmi.fi
AF: Finnish Meteorological Institute, Space Research Division, Vuorikatu 15 A, Helsinki, 00101 Finland
AU: Pulkkinen, T I
EM: tuija.pulkkinen@fmi.fi
AF: Finnish Meteorological Institute, Space Research Division, Vuorikatu 15 A, Helsinki, 00101 Finland
AU: Koskinen, H E
EM: hannu.koskinen@fmi.fi
AF: University of Helsinki, Departmen of Physical Sciences, PL 64, Helsinki, 00014 Finland
AU: Janhunen, P
EM: pekka.janhunen@fmi.fi
AF: Finnish Meteorological Institute, Space Research Division, Vuorikatu 15 A, Helsinki, 00101 Finland
AU: Laitinen, T V
EM: tiera.laitinen@helsinki.fi
AF: Finnish Meteorological Institute, Space Research Division, Vuorikatu 15 A, Helsinki, 00101 Finland
AB: We have developed a method which can be used to analyze the temporal and spatial variations of energy transfer at the magnetopause using the GUMICS-4 global MHD simulation. Earlier results have pointed out that the Poynting flux focusing controls the magnetopause energy transfer both spatially and temporally during southward IMF. During northward IMF the spatial and temporal variations of solar wind energy transfer have been shown to be more difficult to categorize. Here we study the magnetopause energy and mass transfer locations during a variety of IMF and solar wind conditions in the GUMICS-4 global MHD simulation, with a specific focus to the northward IMF orientation. First, we identify the locations at the magnetopause where the magnetosheath and magnetosphere magnetic field lines are antiparallel. Second, we investigate whether the energy and mass transfer rates at these reconnection locations dominate over other locations at the magnetopause. Finally, we investigate the dependency of the energy and mass transfer locations on the solar wind parameters.
DE: 2724 Magnetopause, cusp, and boundary layers
DE: 2753 Numerical modeling
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting