Full-Scale Numerical Modeling of Turbulent Processes in the Earth's Ionosphere
2008 (English)In: Frontiers in Modern Plasma Physics: 2008 ICTP International Workshop on the Frontiers of Modern Plasma Physics, 2008, 197-207 p.Conference paper (Refereed)
We present a full-scale simulation study of ionospheric turbulence by means of a generalized Zakharov model based on the separation of variables into high-frequency and slow time scales. The model includes realistic length scales of the ionospheric profile and of the electromagnetic and electrostatic fields, and uses ionospheric plasma parameters relevant for high-latitude radio facilities such as Eiscat and HAARP. A nested grid numerical method has been developed to resolve the different length-scales, while avoiding severe restrictions on the time step. The simulation demonstrates the parametric decay of the ordinary mode into Langmuir and ion-acoustic waves, followed by a Langmuir wave collapse and short-scale caviton formation, as observed in ionospheric heating experiments.
Place, publisher, year, edition, pages
2008. 197-207 p.
, AIP Conference Proceedings, 1061
IdentifiersURN: urn:nbn:se:umu:diva-20809DOI: 10.1063/1.3013768OAI: oai:DiVA.org:umu-20809DiVA: diva2:209604