Tests of Time Evolutions in Deterministic Models, by Random Sampling of Space Plasma Phenomena

Pécseli, H. L.; Trulsen, J.

doi:10.1007/3-540-33203-0_11

Cited by 1 publication

(1 citation statement)

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“…The nonlinear space-time evolution has been studied analytically (Musher and Sturman, 1975;Sotnikov et al, 1978;Shapiro et al, 1993) for these wave types. Such waves have indeed been observed in nature with solid indications of a nonlinear evolution (Kjus et al, 1998;Høymork et al, 2000;Schuck et al, 2003;Schuck et al, 2004), but it remains questionable whether this evolution can be attributed to wave-collapse phenomena (Pécseli et al, 1996;Pécseli and Trulsen, 2006). The scales of the local wave packets in the B-transverse direction are well known from satellite observations, but the magnetic field aligned length scales have not been studied in space.…”

Section: Lower-hybrid Wavesmentioning

confidence: 99%

The Impact of Turbulence on the Ionosphere and Magnetosphere

Guio

Pécseli

2021

Front. Astron. Space Sci.

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An important property associated with turbulence in plasmas and fluids is anomalous transport. Plasma, being a good conductor, can in addition be affected by turbulence causing an anomalous resistivity that can significantly exceed its classical counterpart. While turbulent transport may be adequately described in configuration space, some aspects of the anomalous resistivity are best accounted for in phase space. Kinetic phenomena like electron and ion phase space vortices can thus act as obstacles for the free flow of slow charged particles. Plasma instabilities and large amplitude plasma waves are candidates for contributions to the anomalous resistivity by generating such structures. Langmuir waves can be relevant, but also others, such as upper- as well as lower-hybrid waves in magnetized plasmas. Often these anomalous resistivity effects can be small, but due to the large spatial and temporal scales involved in space plasmas, planetary ionosphere and magnetosphere in particular, even such moderate effects can be important. This mini-review is discussing elements of the description of plasma turbulence with particular attention to wave phenomena that contribute to anomalous resistivity and diffusion. Turbulence effects can have relevance for space weather phenomena as well, where ground based and airborne activities relying on for instance Global Positioning and Global Navigation Satellite Systems are influenced by plasma conditions in geospace.

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