The Kelvin-Helmholtz instability has been invoked to describe the formation of auroral curls and spirals. In this paper we present results about the generation of field-aligned currents (FACs) by the Kelvin-Helmholtz instability using a three- dimensional compressible simulation at the dayside low-latitude boundary layer. We explore the relationship of the height-integrated Pedersen conductivity with the formation of the Kelvin-Helmholtz instability and the generation of FACs. A higher conductivity stabilizes the system but generates a larger integrated FAC. When the two ionospheres have different conductivities, an interhemispherical current can be generated.
|Original language||English (US)|
|Title of host publication||Magnetospheric Current Systems, 2000|
|Editors||Ryoichi Fujii, Shin-Ichi Ohtani, Michael Hesse, Robert L. Lysak|
|Publisher||Blackwell Publishing Ltd|
|Number of pages||8|
|State||Published - 2000|
|Name||Geophysical Monograph Series|
Bibliographical noteFunding Information:
AcknowledgmentTsh. is work was supportebdy NASA Grants NGT5-50186 and NAG5-4466 and NSF Grant ATM-9502907. Supercomputing time was provided by the Minnesota SupercomputeIrn stitute.
© 2000 by the American Geophysical Union.
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