Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm51b1290d&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM51B-1290
Physics
2724 Magnetopause And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2764 Plasma Sheet, 2784 Solar Wind/Magnetosphere Interactions
Scientific paper
We have studied structure of pressure in the magnetotail using the data from the Geotail spacecraft. The statistical analysis have clarified three outstanding points. First, the total pressure (magnetic pressure + plasma pressure) in the lobe (beta<0.1) tends to be higher than that in the plasma sheet (beta>0.1) in all regions. Second, the structure of total pressure in the midtail region shows seasonal dependence. In summer, total pressure in the southern part is higher than that of the northern part or the neutral sheet. In winter, in contrast, total pressure in the northern part is higher. Third, response of solar wind dynamic pressure has dawn-dusk and north-south asymmetries for total pressure in the magnetotail. Here, solar wind dynamic pressure is calculated by using ACE and WIND data obtained from CDAWeb data services.
Doi Shunsuke
Nagai Takaya
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