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Full-Scale Numerical Modeling of Turbulent Processes in the Earth's Ionosphere
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
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, Published paper (Refereed)
Abstract [en]

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.
Series
AIP Conference Proceedings, 1061
Identifiers
URN: urn:nbn:se:umu:diva-20809DOI: 10.1063/1.3013768OAI: oai:DiVA.org:umu-20809DiVA: diva2:209604
Available from: 2009-03-25 Created: 2009-03-25

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  • apa
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