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Foullon, C.; Farrugia, C.J.; Fazakerley, A.N.; Owen, C.J.; Gratton, F.T.; Torbert, R.B. "Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause" (2008) Journal of Geophysical Research: Space Physics. 113(11)
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Abstract:

Our purpose is to characterize the evolution of the magnetopause Kelvin-Helmholtz (KH) wave activity with changes in thickness of the adjacent boundary layer, geomagnetic latitude and interplanetary magnetic field (IMF) orientation. As the IMF turns northward, wave activity may be generated at the dayside before propagating down the tail, where the boundary layer is expected to support longer wavelengths. We use two-point observations on the dusk magnetopause at low latitudes, from Geotail on the dayside and Cluster tailward of the dusk terminator. We quantify the wavelength, power, wavefront steepness and propagation direction at Cluster. An estimate of the thickness of the low-latitude boundary layer (LLBL) is obtained by correlating normal distances to the magnetopause, derived from two empirical solar-wind-driven models, with a systematic relationship (the "transition parameter") found between the electron number density and temperature; the correlation factor is used to infer the temporal evolution of the thickness of the locally sampled layer. We find that wavelengths are controlled by the IMF clock angle, as expected when generated by the KH mechanism at the dayside, although amplitudes, wavefront steepness and propagation directions are more closely correlated with the layer thickness. A survey of parameter space provides evidence of the contribution of the KH mechanism to the widening of the electron LLBL. Copyright 2008 by the American Geophysical Union.

Registro:

Documento: Artículo
Título:Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause
Autor:Foullon, C.; Farrugia, C.J.; Fazakerley, A.N.; Owen, C.J.; Gratton, F.T.; Torbert, R.B.
Filiación:Mullard Space Science Laboratory, University College London, Surrey, United Kingdom
Space Science Center, Department of Physics, University of New Hampshire, Durham, NH, United States
Instituto de Física del Plasma, CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
Space Science Center, Department of Physics, University of New Hampshire, 9 College Rd., Durham, NH 03824, United States
Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, United Kingdom
Instituto de Física del Plasma, CONICET, Universidad de Buenos Aires, Pab. 1, 1428, Buenos Aires, Argentina
Año:2008
Volumen:113
Número:11
DOI: http://dx.doi.org/10.1029/2008JA013175
Título revista:Journal of Geophysical Research: Space Physics
Título revista abreviado:J. Geophys. Res. A. Space Phys.
ISSN:21699402
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699402_v113_n11_p_Foullon

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Citas:

---------- APA ----------
Foullon, C., Farrugia, C.J., Fazakerley, A.N., Owen, C.J., Gratton, F.T. & Torbert, R.B. (2008) . Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause. Journal of Geophysical Research: Space Physics, 113(11).
http://dx.doi.org/10.1029/2008JA013175
---------- CHICAGO ----------
Foullon, C., Farrugia, C.J., Fazakerley, A.N., Owen, C.J., Gratton, F.T., Torbert, R.B. "Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause" . Journal of Geophysical Research: Space Physics 113, no. 11 (2008).
http://dx.doi.org/10.1029/2008JA013175
---------- MLA ----------
Foullon, C., Farrugia, C.J., Fazakerley, A.N., Owen, C.J., Gratton, F.T., Torbert, R.B. "Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause" . Journal of Geophysical Research: Space Physics, vol. 113, no. 11, 2008.
http://dx.doi.org/10.1029/2008JA013175
---------- VANCOUVER ----------
Foullon, C., Farrugia, C.J., Fazakerley, A.N., Owen, C.J., Gratton, F.T., Torbert, R.B. Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause. J. Geophys. Res. A. Space Phys. 2008;113(11).
http://dx.doi.org/10.1029/2008JA013175