Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1443o&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 14, July 24, 1992, p. 1443-1446.
Physics
15
Geomagnetic Tail, Magnetic Flux, Magnetohydrodynamic Flow, Solar Wind, Space Plasmas, Magnetopause, Magnetosheath, Mass Transfer
Scientific paper
An analysis, based on the principles of stress balance in a 1-dimensional current sheet is presented, which considers the problem of closed magnetic flux transport into the deep tail by a 'viscous'-like interaction between the solar wind and the magnetosphere. The analysis is illustrated with an example of ISEE-3 data showing strong tailward plasma sheet flows on apparently closed field lines in the deep tail. Apart from narrow regions adjacent to the magnetopause, these flows are not driven by the scattering of magnetosheath plasma into the magnetosphere. The fraction of the magnetosheath momentum flux needed to be anomalously transferred into the plasma sheet to drive the flows is estimated. In the example this is 6 percent. No previously suggested mechanism (e.g., the Kelvin-Helmholtz instability) has been shown capable of providing anomalous momentum transport of this magnitude. The current understanding of the 'viscous' interaction between the solar wind and magnetosphere is thus insufficient to explain these observations.
Owen Christopher J.
Slavin James Arthur
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