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Farrugia, C.J.; Gratton, F.T.; Gnavi, G.; Torbert, R.B.; Wilson III, L.B. "A vortical dawn flank boundary layer for near-radial IMF: Wind observations on 24 October 2001" (2014) Journal of Geophysical Research: Space Physics. 119(6):4572-4590
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Abstract:

We present an example of a boundary layer tailward of the dawn terminator which is entirely populated by rolled-up flow vortices. Observations were made by Wind on 24 October 2001 as the spacecraft moved across the region at X ∼-13 RE. Interplanetary conditions were steady with a near-radial interplanetary magnetic field (IMF). Approximately 15 vortices were observed over the 1.5 h duration of Wind's crossing, each lasting ∼5 min. The rolling up is inferred from the presence of a hot tenuous plasma being accelerated to speeds higher than in the adjoining magnetosheath, a circumstance which has been shown to be a reliable signature of this in single-spacecraft observations. A blob of cold dense plasma was entrained in each vortex, at whose leading edge abrupt polarity changes of field and velocity components at current sheets were regularly observed. In the frame of the average boundary layer velocity, the dense blobs were moving predominantly sunward and their scale size along X was ∼7.4 RE. Inquiring into the generation mechanism of the vortices, we analyze the stability of the boundary layer to sheared flows using compressible magnetohydrodynamic Kelvin-Helmholtz theory with continuous profiles for the physical quantities. We input parameters from (i) the exact theory of magnetosheath flow under aligned solar wind field and flow vectors near the terminator and (ii) the Wind data. It is shown that the configuration is indeed Kelvin-Helmholtz (KH) unstable. This is the first reported example of KH-unstable waves at the magnetopause under a radial IMF. ©2014. American Geophysical Union. All Rights Reserved.

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Documento: Artículo
Título:A vortical dawn flank boundary layer for near-radial IMF: Wind observations on 24 October 2001
Autor:Farrugia, C.J.; Gratton, F.T.; Gnavi, G.; Torbert, R.B.; Wilson III, L.B.
Filiación:Space Science Center, Department of Physics, University of New Hampshire, Durham NH, United States
Instituto de Física Del Plasma, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
Departamento de Física, Facultad de Ciencias Fisicomatemáticas e Ingeniería, Pontificia Universidad Catõlica Argentina, Buenos Aires, Argentina
NASA/Goddard Space Flight Center, Greenbelt MD, United States
Palabras clave:KH vortices; near-radial IMF; vortical boundary layer
Año:2014
Volumen:119
Número:6
Página de inicio:4572
Página de fin:4590
DOI: http://dx.doi.org/10.1002/2013JA019578
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_v119_n6_p4572_Farrugia

Referencias:

  • Burlaga, L.-F., Sittler, E., Mariani, F., Schwenn, R., Magnetic loop behind an interplanetary shock: Voyager, Helios and IMP 8 observations (1981) J. Geophys. Res., 86, pp. 6673-6684
  • Chen, L., Hasegawa, A., A theory of long-period magnetic pulsations: 1. Steady state excitation of field line resonance (1974) J. Geophys. Res., 79 (7), pp. 1024-1032
  • Chen, S.-H., Kivelson, M.-G., On nonsinusoidal waves at the Earth's magnetopause (1993) Geophys. Res. Lett., 20 (23), pp. 2699-2702. , doi: 10.1029/93GL02622
  • Cowley, S.-W.-H., The causes of convection in the Earth's magnetosphere: A review of developments during the IMS (1982) Rev. Geophys., 20, pp. 531-565
  • Farrugia, C.-J., Gratton, F.-T., Torbert, R.-B., The role of viscous-type processes in solar wind-magnetosphere interactions, in challenges to long-standing unsolved problems in space physics in the 20th century (2001) Space Sci. Rev., 95, pp. 443-456
  • Farrugia, C.J., Grocott, A., Sandholt, P.E., Cowley, S.W.H., Miyoshi, Y., Rich, F.J., Jordanova, V.K., Sharma, A., The magnetosphere under weak solar wind forcing (2007) Annales Geophysicae, 25 (1), pp. 191-205
  • Farrugia, C.J., Magnetosheath for almost-aligned solar wind magnetic field and flow vectors: Wind observations across the dawnside magnetosheath at X = -12 Re (2010) J. Geophys. Res., 115, pp. A08227. , doi: 10.1029/2009JA015128
  • Gnavi, G., Gratton, F.-T., Farrugia, C.-J., Bilbao, L.-E., Supersonic mixing layers: Stability of magnetospheric flanks models (2009) J. Phys. Conf. Ser., 166, p. 012022. , doi: 10.1088/1742-6596/166/1/012022
  • Gosling, J.-T., Thomsen, M.-F., Bame, S.-J., Russell, C.-T., Accelerated plasma flows at the near-tail magnetopause (1986) J. Geophys. Res., 91, pp. 3029-3041
  • Gratton, F.-T., Bender, L., Farrugia, C.-J., Gnavi, G., Concerning a problem on the Kelvin-Helmholtz stability of the thin magnetopause (2004) J. Geophys. Res., 109, pp. A04211. , doi: 10.1029/2003JA010146
  • Gratton, F.-T., Gnavi, G., Farrugia, C.-J., Bender, L., On the MHD boundary of Kelvin-Helmholtz stability diagrams at large wavelengths (2004) Braz. J. Phys., 34, pp. 1804-1813
  • Gratton, J., Gratton, F.-T., González, A.-G., Convective instability of internal modes in accelerated compressible plasmas (1988) Plasma Phys. Controlled Fusion, 30, pp. 435-456
  • Hasegawa, H., Structure and dynamics of the magnetopause and its boundary layers (2012) Monogr. Environ. Earth Planets, 1 (2), pp. 71-119. , doi: 10.5047/meep.2012.00102.0071
  • Hasegawa, H., Fujimoto, M., Phan, T.-D., Reme, H., Balogh, A., Dunlop, M.W., Hashimoto, C., TanDokoro, R., Transport of solar wind into Earth's magnetosphere through rolled-up Kelvin-Helmholtz vortices (2004) Nature, 430 (7001), pp. 755-758. , DOI 10.1038/nature02799
  • Hasegawa, H., Fujimoto, M., Takagi, K., Saito, Y., Mukai, T., Rème, H., Single-spacecraft detection of rolled-up Kelvin-Helmholtz vortices at the flank magnetopause (2006) J. Geophys. Res., 111, pp. A09203. , doi: 10.1029/2006JA011728
  • Hwang, K.-J., Kuznetsova, M.-M., Sahraoui, F., Goldstein, M.-L., Lee, E., Parks, G.-K., Kelvin-Helmholtz waves under southward interplanetary magnetic field (2012) J. Geophys. Res., 116, pp. A08210. , doi: 10.1029/2011JA016596
  • Hwang, K.-J., Goldstein, M.-L., Kuznetsova, M.-M., Yang, Y., Viñas, A., The first in situ observation of Kelvin-Helmholtz waves at high-latitude magnetopause during strongly dawnward interplanetary magnetic field conditions (2012) J. Geophys. Res., 117, pp. A08233. , doi: 10.1029/2011JA017256
  • Lepping, R., Burlaga, L., Geomagnetopause surface fluctuations observed by Voyager 1 (1979) J. Geophys. Res., 84 (A12), pp. 7099-7106
  • Lepping, R.P., The wind magnetic field investigation (1995) Space Sci. Rev., 71, pp. 207-229
  • Lin, R.P., A three-dimensional plasma and energetic particle investigation for the Wind spacecraft (1995) Space Sci. Rev., 71, pp. 125-153
  • Lopez, R.-E., Solar cycle invariance in solar wind proton temperature relationships (1987) J. Geophys. Res., 92 (A10), p. 11
  • McComas, D.J., Bame, S.J., Barker, P., Feldman, W.C., Phillips, J.L., Riley, P., Griffee, J.W., Solar wind electron proton alpha monitor (SWEPAM) for the advanced composition explorer (1998) Space Science Reviews, 86 (1-4), pp. 563-612
  • Miura, A., Kelvin-Helmholtz instability at the magnetospheric boundary: Dependence on the magnetosheath sonic Mach number (1992) J. Geophys. Res., 97, p. 10
  • Miura, A., Compressible magnetohydrodynamic Kelvin-Helmholtz instability with vortex pairing in the two-dimensional transverse configuration (1997) Physics of Plasmas, 4 (8), pp. 2871-2885
  • Nakamura, T.-K.-M., Hayashi, D., Fujimoto, M., Shinohara, I., Decay of MHD-scale Kelvin-Helmholtz vortices mediated by parasitic electron dynamics (2004) Phys. Rev. Lett., , 145001
  • Ogilvie, K.-W., Fitzenreiter, R.-J., The Kelvin-Helmholtz instability at the magnetopause and inner boundary layer surface (1989) J. Geophys. Res., 94 (A11), p. 15
  • Otto, A., Fairfield, D., Kelvin-Helmholtz instability at the magnetotail boundary: MHD simulation and comparison with Geotail observations (2000) J. Geophys. Res., 105 (A9), p. 21
  • Otto, A., Nykyri, K., Kelvin-Helmholtz instability and magnetic reconnection: Mass transport at the LLBL (2003) Earth's Low-Latitude Boundary Layer, Geophys. Monog. Ser., pp. 53-61. , in, -133, edited by P.-T. Newell and T. Onsager, AGU, Washington, D.-C
  • Sckopke, N., Paschmann, G., Haerendel, G., Sonnerup, B., Bame, S., Forbes, T., Hones, E., Russell, C., Structure of the low-latitude boundary layer (1981) J. Geophys. Res., 86 (A4), pp. 2099-2110. , doi: 10.1029/JA086iA04p02099
  • Smets, R., Delcourt, D., Chanteur, G., Moore, T.E., On the incidence of Kelvin-Helmholtz instability for mass exchange process at the Earth's magnetopause (2002) Annales Geophysicae, 20 (6), pp. 757-769
  • Smith, C.W., L'Heureux, J., Ness, N.F., Acuna, M.H., Burlaga, L.F., Scheifele, J., The ace magnetic fields experiment (1998) Space Science Reviews, 86 (1-4), pp. 613-632
  • Sonnerup, B.-U.-O., Theory of the low-latitude boundary layer (1980) J. Geophys. Res., 85 (A5), pp. 2017-2026
  • Southwood, D.-J., Some features of field line resonances in the magnetosphere (1974) Planet. Space Sci., 22 (3), pp. 483-491
  • Spreiter, J.-R., Rizzi, A.-W., Aligned magnetohydrodynamic solution for solar wind flow past the Earth's magnetosphere (1974) Acta Astronaut., 1, pp. 15-35
  • Takagi, K., Hashimoto, C., Hasegawa, H., Fujimoto, M., Tandokoro, R., Kelvin-Helmholtz instability in a magnetotail flank-like geometry: Three-dimensional MHD simulations (2006) J. Geophys. Res., 111, pp. A08202. , doi: 10.1029/2006JA011631

Citas:

---------- APA ----------
Farrugia, C.J., Gratton, F.T., Gnavi, G., Torbert, R.B. & Wilson III, L.B. (2014) . A vortical dawn flank boundary layer for near-radial IMF: Wind observations on 24 October 2001. Journal of Geophysical Research: Space Physics, 119(6), 4572-4590.
http://dx.doi.org/10.1002/2013JA019578
---------- CHICAGO ----------
Farrugia, C.J., Gratton, F.T., Gnavi, G., Torbert, R.B., Wilson III, L.B. "A vortical dawn flank boundary layer for near-radial IMF: Wind observations on 24 October 2001" . Journal of Geophysical Research: Space Physics 119, no. 6 (2014) : 4572-4590.
http://dx.doi.org/10.1002/2013JA019578
---------- MLA ----------
Farrugia, C.J., Gratton, F.T., Gnavi, G., Torbert, R.B., Wilson III, L.B. "A vortical dawn flank boundary layer for near-radial IMF: Wind observations on 24 October 2001" . Journal of Geophysical Research: Space Physics, vol. 119, no. 6, 2014, pp. 4572-4590.
http://dx.doi.org/10.1002/2013JA019578
---------- VANCOUVER ----------
Farrugia, C.J., Gratton, F.T., Gnavi, G., Torbert, R.B., Wilson III, L.B. A vortical dawn flank boundary layer for near-radial IMF: Wind observations on 24 October 2001. J. Geophys. Res. A. Space Phys. 2014;119(6):4572-4590.
http://dx.doi.org/10.1002/2013JA019578