Journal cover Journal topic
Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.558 IF 1.558
  • IF 5-year value: 1.475 IF 5-year
    1.475
  • CiteScore value: 2.8 CiteScore
    2.8
  • SNIP value: 0.921 SNIP 0.921
  • IPP value: 1.56 IPP 1.56
  • SJR value: 0.571 SJR 0.571
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 55 Scimago H
    index 55
  • h5-index value: 22 h5-index 22
Volume 10, issue 1/2
Nonlin. Processes Geophys., 10, 151–177, 2003
https://doi.org/10.5194/npg-10-151-2003
© Author(s) 2003. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: 4th International Workshop on Nonlinear Waves and Chaos in...

Nonlin. Processes Geophys., 10, 151–177, 2003
https://doi.org/10.5194/npg-10-151-2003
© Author(s) 2003. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  30 Apr 2003

30 Apr 2003

Geometric aspects of HF driven Langmuir turbulence in the ionosphere

E. Mjølhus1, E. Helmersen2, and D. F. DuBois3 E. Mjølhus et al.
  • 1University of Tromsø, Faculty of Science, Department of Mathematics and Statistics, N-9037 Tromsø, Norway
  • 2Poseidon Simulation AS, N-8376 Leknes, Norway
  • 3Los Alamos National Laboratory, Los Alamos, NM 87545, USA

Abstract. The geometric aspects of HF-generated Langmuir turbulence in the ionosphere and its detection by radars are theoretically discussed in a broad approach, including local modelling (damped and driven Zakharov system), basic parametric instabilities, polarization and strength of the driving electric field, and radar configurations. Selected examples of numerical results from the local model are presented and discussed in relation to recent experiments, with emphasis on recent experiments at the EISCAT facilities. Anisotropic aspects of the cavitation process in the magnetized plasma are exhibited. Basic processes of cascades and cavitation are by now well identified in these experiments, but a few problems of the detailed agreement between theory and experiments are pointed out.

Publications Copernicus
Download
Citation