Preprints
https://doi.org/10.5194/npgd-1-1431-2014
https://doi.org/10.5194/npgd-1-1431-2014
26 Aug 2014
 | 26 Aug 2014
Status: this preprint was under review for the journal NPG. A revision for further review has not been submitted.

Self-organization of ULF electromagnetic wave structures in the shear flow driven dissipative ionosphere

G. Aburjania, K. Chargazia, O. Kharshiladze, and G. Zimbardo

Abstract. This work is devoted to investigation of nonlinear dynamics of planetary electromagnetic (EM) ultra-low-frequency wave (ULFW) structures in the rotating dissipative ionosphere in the presence of inhomogeneous zonal wind (shear flow). Planetary EM ULFW appears as a result of interaction of the ionospheric medium with the spatially inhomogeneous geomagnetic field. The shear flow driven wave perturbations effectively extract energy of the shear flow increasing own amplitude and energy. These perturbations undergo self organization in the form of the nonlinear solitary vortex structures due to nonlinear twisting of the perturbation's front. Depending on the features of the velocity profiles of the shear flows the nonlinear vortex structures can be either monopole vortices, or dipole vortex, or vortex streets and vortex chains. From analytical calculation and plots we note that the formation of stationary nonlinear vortex structure requires some threshold value of translation velocity for both non-dissipation and dissipation complex ionospheric plasma. The space and time attenuation specification of the vortices is studied. The characteristic time of vortex longevity in dissipative ionosphere is estimated. The long-lived vortices transfer the trapped medium particles, energy and heat. Thus they represent structural elements of turbulence in the ionosphere.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
G. Aburjania, K. Chargazia, O. Kharshiladze, and G. Zimbardo
 
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
G. Aburjania, K. Chargazia, O. Kharshiladze, and G. Zimbardo
G. Aburjania, K. Chargazia, O. Kharshiladze, and G. Zimbardo

Viewed

Total article views: 1,276 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
818 355 103 1,276 77 91
  • HTML: 818
  • PDF: 355
  • XML: 103
  • Total: 1,276
  • BibTeX: 77
  • EndNote: 91
Views and downloads (calculated since 26 Aug 2014)
Cumulative views and downloads (calculated since 26 Aug 2014)
Latest update: 21 Jun 2024