Influence of inhomogeneities of the plasma density and electric field on the generation of electrostatic noise in the auroral zone

Чернышов, А. А.; Ilyasov, A. A.; Mogilevskii, M. M.; Golovchanskaya, I. V.; Kozelov, B. V.

doi:10.1134/s1063780x15030010

Cited by 16 publications

(12 citation statements)

References 33 publications

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“…The high-latitude ionosphere is characterized by intense small-scale irregularities and inhomogeneities in the plasma density [18][19][20] , which can be related to electric fields and increased precipitation of energetic particles. For example, the largest number of jumps in determining TEC during periods of geomagnetic storms is located close to the auroral oval 14 .…”

Section: The Influence Of An Auroral Substorm On the Total Electron Cmentioning

confidence: 99%

Relationship between TEC jumps and auroral substorm in the high-latitude ionosphere

Чернышов

Miloch

Jin

et al. 2020

Sci Rep

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The influence of an auroral substorm on the total electron content (TEC) jumps and cycle slips on Global Positioning System (GPS) at high-latitudes is studied. For the first time, optical data from the all-sky imager, as well as interplanetary magnetic field and magnetometer data are used to complete the analysis of the slips occurrence and to monitor the substorm evolution. Two types of slips are considered: (i) instrumental slips including losses in the measured phase of the GPS signal and (ii) sharp TEC variations (TEC jumps) It is demonstrated that the jumps in TEC determined from the GPS signals are mainly related to the auroral particle precipitation that normally occurs during geomagnetic substorms in the polar ionosphere. The GPS frequency $${L}_{2}$$L2 is consistently subject to more slips than frequency $${L}_{1}$$L1 both for quiet and disturbed conditions. The probability of TEC jumps is higher than for cycle slips in phase at frequencies $${L}_{1}$$L1 and $${L}_{2}$$L2. The maximum of TEC jumps is observed during the recovery phase of the auroral substorm. Our findings are based on a data set obtained for a particular event. A generalization of the obtained numerical estimates to other events requires additional research and further analysis.

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Section: The Influence Of An Auroral Substorm On the Total Electron Cmentioning

confidence: 99%

Relationship between TEC jumps and auroral substorm in the high-latitude ionosphere

Чернышов

Miloch

Jin

et al. 2020

Sci Rep

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“…26 and 27, and references herein). Numerical stability analysis using FAST or FREJA satellite data was carried out in recent papers, 20,21,[28][29][30] and it was confirmed that the IEDD instability could play an important role in the creation of electrostatic broadband turbulence (or noise) in the auroral zone and explain the experimental observations.…”

Section: Introductionmentioning

confidence: 74%

“…Later, these results were expanded using other sources of free energy such as field-aligned velocity of particles 19 and plasma density. 20,21 Fluctuations of the electric field and of the plasma density were successfully identified in laboratory experiments with plasma (e.g., Refs. [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Studies of small-scale plasma inhomogeneities in the cusp ionosphere using sounding rocket data

et al. 2018

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Microprocesses associated with plasma inhomogeneities are studied on the basis of data from the Investigation of Cusp Irregularities (ICI-3) sounding rocket. The ICI-3 rocket is devoted to investigating a reverse flow event in the cusp F region ionosphere. By numerical stability analysis, it is demonstrated that inhomogeneous-energy-density-driven (IEDD) instability can be a mechanism for the excitation of small-scale plasma inhomogeneities. The Local Intermittency Measure (LIM) method also applied the rocket data to analyze irregular structures of the electric field during rocket flight in the cusp. A qualitative agreement between high values of the growth rates of the IEDD instability and the regions with enhanced LIM is observed. This suggests that IEDD instability is connected to turbulent non-Gaussian processes.

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“…The IEDDI can play a fundamental role in the generation of broadband electrostatic turbulence (or noise) in the auroral region high‐latitude ionosphere [ Hamrin et al , ; Chernyshov et al , ; Ilyasov et al , ] and for the outflow of ions from the ionosphere into the magnetosphere [ André et al , ]. Similar processes can be observed in regions of the high‐latitude ionosphere such as the cusp and the cleft.…”

Section: Introductionmentioning

confidence: 99%

Reverse flow events and small‐scale effects in the cusp ionosphere

et al. 2016

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We report in situ measurements of plasma irregularities associated with a reverse flow event (RFE) in the cusp F region ionosphere. The Investigation of Cusp Irregularities 3 (ICI‐3) sounding rocket, while flying through a RFE, encountered several regions with density irregularities down to meter scales. We address in detail the region with the most intense small‐scale fluctuations in both the density and in the AC electric field, which were observed on the equatorward edge of a flow shear, and coincided with a double‐humped jet of fast flow. Due to its long‐wavelength and low‐frequency character, the Kelvin‐Helmholtz instability (KHI) alone cannot be the source of the observed irregularities. Using ICI‐3 data as inputs, we perform a numerical stability analysis of the inhomogeneous energy‐density‐driven instability (IEDDI) and demonstrate that it can excite electrostatic ion cyclotron waves in a wide range of wave numbers and frequencies for the electric field configuration observed in that region, which can give rise to the observed small‐scale turbulence. The IEDDI can seed as a secondary process on steepened vortices created by a primary KHI. Such an interplay between macroprocesses and microprocesses could be an important mechanism for ion heating in relation to RFEs.

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Influence of inhomogeneities of the plasma density and electric field on the generation of electrostatic noise in the auroral zone

Cited by 16 publications

References 33 publications

Relationship between TEC jumps and auroral substorm in the high-latitude ionosphere

Relationship between TEC jumps and auroral substorm in the high-latitude ionosphere

Studies of small-scale plasma inhomogeneities in the cusp ionosphere using sounding rocket data

Reverse flow events and small‐scale effects in the cusp ionosphere

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