Intermittency analyses on the SIERRA measurements of the electric field fluctuations in the auroral zone

Tam, Sunny Wing-Yee; Chang, Tom; Kintner, P. M.; Klatt, E.

doi:10.1029/2004gl021445

Cited by 48 publications

(63 citation statements)

References 18 publications

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“…To examine these fields, we applied the technique of the generalized structure function and probability density function, and demonstrated that they generally have scaling properties similar to those of the turbulent electric fields in the auroral zone [Tam et al, 2005]. The observed scaling features are in a good agreement with the scenario proposed by Chang et al [2004].…”

Section: Discussionsupporting

confidence: 56%

“…A similarity between the turbulence and discrete auroral features with respect to the global distribution, seasonal variation, relation to solar wind, IMF and geomagnetic conditions has been pointed out by Heppner [1973], Saflekos and Potemra [1978], Golovchanskaya et al [2002], and Matsuo et al [2003]. Recently, Tam et al [2005] have performed intermittency analysis on the electric field data obtained by a sounding rocket in the auroral zone. By examining the PDF and local intermittency measure, they evidenced the intermittent turbulence for the broadband ELF electric field fluctuations and showed that the degree of intermittency is larger at smaller scales.…”

Section: Introductionmentioning

confidence: 97%

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Scaling of electric field fluctuations associated with the aurora during northward IMF

Kozelov

Golovchanskaya

2006

Geophysical Research Letters

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[1] We present a statistical study of scaling features of the electric field fluctuations measured by the DE2 satellite in the polar region during positive Bz IMF when the thetaaurora was observed by the DE1 satellite. It is demonstrated that the power spectra of the fluctuations have a power-law form at spatial scales from $0.5 km (the limit of resolution) to several thousands of kilometers, with a break near 100 km. The scaling properties of the field are studied by examining the generalized structure functions (GSFs) and probability density functions (PDFs) of the fluctuations. The observed PDFs have a non-Gaussian shape with heavy tails. We also demonstrate a collapse of the re-scaled PDFs onto a single curve. A relation of PDF shape to solar wind conditions is revealed. The same analysis is performed on the TV observations of the theta-aurora. The scaling characteristics of the field and auroral fluctuations are compared. Citation: Kozelov, B. V., and I. V. Golovchanskaya (2006), Scaling of electric field fluctuations associated with the aurora during northward IMF, Geophys.

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Section: Discussionsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 97%

Scaling of electric field fluctuations associated with the aurora during northward IMF

Kozelov

Golovchanskaya

2006

Geophysical Research Letters

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“…As evident from the analysis, our diagnostic is based on structure functions of the electrostatic potential. Other related works (Tam et al, 2005) are based on wavelet transforms. They studied the degree of intermittency on different scales and found electric field fluctuations to be more intermittent on smaller scales.…”

Section: Discussionmentioning

confidence: 99%

“…Such waves are often spontaneously excited in nature by plasma instabilities and have been frequently observed also in the Earth's ionosphere. Intermittency effects have been studied in the ionospheric plasma by, for instance, Tam et al (2005), where their work refers to ∼700 km altitudes. Other relevant studies of space plasma turbulence can be found in the work by Chang and Wu (2008).…”

Section: Introductionmentioning

confidence: 99%

Structure functions and intermittency in ionospheric plasma turbulence

Dyrud

Krane

Oppenheim³

et al. 2008

Nonlin. Processes Geophys.

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Abstract. Low frequency electrostatic turbulence in the ionospheric E-region is studied by means of numerical and experimental methods. We use the structure functions of the electrostatic potential as a diagnostics of the fluctuations. We demonstrate the inherently intermittent nature of the low level turbulence in the collisional ionospheric plasma by using results for the space-time varying electrostatic potential from two dimensional numerical simulations. An instrumented rocket can not directly detect the one-point potential variation, and most measurements rely on records of potential differences between two probes. With reference to the space observations we demonstrate that the results obtained by potential difference measurements can differ significantly from the one-point results. It was found, in particular, that the intermittency signatures become much weaker, when the proper rocket-probe configuration is implemented. We analyze also signals from an actual ionospheric rocket experiment, and find a reasonably good agreement with the appropriate simulation results, demonstrating again that rocket data, obtained as those analyzed here, are unlikely to give an adequate representation of intermittent features of the low frequency ionospheric plasma turbulence for the given conditions.

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“…Such has been the case, for instance, for the measured fields in the solar wind, magnetospheric cusp, plasma sheet and the auroral zone (Burlaga, 1991;Bruno et al, 2001;Weygand et al, 2005;Tam et al, 2005;Echim et al, 2007). The origin of intermittent fluctuations in magnetized plasmas was interpreted as the result Correspondence to: S. W. Y.…”

Section: Introductionmentioning

confidence: 94%

Double rank-ordering technique of ROMA (Rank-Ordered Multifractal Analysis) for multifractal fluctuations featuring multiple regimes of scales

Tam

Chang

2011

Nonlin. Processes Geophys.

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Abstract. Rank-Ordered Multifractal Analysis (ROMA), a technique capable of deciphering the multifractal characteristics of intermittent fluctuations, was originally applied to the results of a magnetohydrodynamic (MHD) simulation. Application of ROMA to measured fluctuations in the auroral zone, due to the dominant physical effects changing from kinetic to MHD as the scale increases, requires an additional level of rank-ordering in order to divide the domain of scales into regimes. An algorithm for the additional step in this double rank-ordering technique is discussed, and is demonstrated in the application to the electric field fluctuations in the auroral zone as an example. As a result of the double rank-ordering, ROMA is able to take into account the nonlinear crossover behavior characterized by the multiple regimes of time scales by providing a scaling variable and a scaling function that are global to all the time scales.

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Intermittency analyses on the SIERRA measurements of the electric field fluctuations in the auroral zone

Cited by 48 publications

References 18 publications

Scaling of electric field fluctuations associated with the aurora during northward IMF

Scaling of electric field fluctuations associated with the aurora during northward IMF

Structure functions and intermittency in ionospheric plasma turbulence

Double rank-ordering technique of ROMA (Rank-Ordered Multifractal Analysis) for multifractal fluctuations featuring multiple regimes of scales

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