A survey of magnetopause FTEs and associated flow bursts in the polar ionosphere

Neudegg, Dave; Cowley, S. W. H.; Milan, S. E.; Yeoman, T. K.; Lester, M.; Provan, G.; Haerendel, G.; Baumjohann, W.; Nikutowski, B.; Büchner, Jörg; Auster, U.; Fornaçon, K.‐H.; Georgescu, E.

doi:10.1007/s00585-000-0416-0

Cited by 60 publications

(46 citation statements)

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“…Parallel currents flowing on the flanks of the flow burst have been modelled (Southwood, 1987;Lockwood et al, 1990Lockwood et al, , 2001 and observed . Results of detailed case studies of corresponding ionospheric and magnetopause features (Elphic et al, 1990;Neudegg et al, 1999Neudegg et al, , 2000 have been complemented by statistical studies of the location, occurrence, and relation to IMF B y of ionospheric flow bursts (e.g., McWilliams et al, 2000). Provan et al (1998, and Thorolfsson et al (2000) have used radars and optical observations to determine the size, shape, velocity and recurrence rate of the ionospheric signatures of FTEs.…”

Section: Flux Transfer Eventsmentioning

confidence: 99%

Magnetopause and Boundary Layer

Keyser

Dunlop

Owen³

et al. 2005

Space Sci Rev

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Section: Flux Transfer Eventsmentioning

confidence: 99%

Magnetopause and Boundary Layer

Keyser

Dunlop

Owen³

et al. 2005

Space Sci Rev

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“…For such small‐scale spatial and temporal features to be accurately represented in such convection maps, extensive radar backscatter coverage is required as an input [ Ruohoniemi and Baker , 1998]. Intervals with such data coverage have recently revealed far more spatial and temporal structuring of the cusp convection [e.g., Neudegg et al , 2000; McWilliams et al , 2001]. The combination of multisatellite data with such ionospheric convection maps will form a future study.…”

Section: Conclusion and Summarymentioning

confidence: 99%

Temporal versus spatial interpretation of cusp ion structures observed by two spacecraft

Trattner

2002

J. Geophys. Res.

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[1] A series of nearly simultaneous cusp crossings by the Polar and Fast Auroral Snapshot (FAST) spacecraft are used to investigate the development of cusp structures such as sudden changes in the energy of cusp precipitating ions. While such changes are generally interpreted as temporal signatures, recent investigations show evidence that such features can also be interpreted as spatial structures. Our analysis of four events during stable solar wind conditions confirms that cusp structures observed by one satellite are remarkably similar to cusp features observed up to several hours later by a second satellite. Using the spatial separation of the Polar and FAST spacecraft, the cusp features could also be traced over several hours in magnetic local time. These similarities led to the conclusion that large-scale cusp structures are spatial structures related to global ionospheric convection pattern set up by magnetic merging and not the result of temporal variations in reconnection parameters.

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“…Of the 807 FTEs in our database, 638 were observed in the magnetosheath (79 %) but only 169 in the magnetosphere (21 %). For comparison, 75 % of the low-latitude Equator-S events reported by Neudegg et al (2000) occurred in the magnetosheath, whereas only ∼69 % of the low-latitude ISEE-1/2 events reported by Rijnbeek et al (1984) and Kuo et al (1995) occurred in the magnetosheath. Figure 6 presents a histogram of all the event amplitudes, as measured by the peak-to-peak variation in Bn.…”

Section: Statistical Surveymentioning

confidence: 90%

Interball-1 observations of flux transfer events

Korotova

Sibeck²,

Petrov³

2012

Ann. Geophys.

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Abstract. We present the results of a survey of 807 FTEs observed by Interball-1 on the mid-and high-latitude dayside and flank magnetopause. Dayside magnetosheath events show a strong tendency to occur for southward magnetosheath magnetic fields suggesting origin via component (or perhaps antiparallel) reconnection near the equatorial plane. Flank FTEs occur for both magnetosheath magnetic field orientations with only a slight preference for southward magnetosheath magnetic fields. These events are consistent with generation along an extended subsolar component reconnection line for all IMF orientations or a combination of reconnection along a subsolar component reconnection line for southward IMF and antiparallel reconnection at higher latitudes for northward IMF. The distribution of direct and reverse magnetosheath FTEs and the tilt angle of the reconnection line for dawnward and duskward IMF are in a good agreement with the theoretical predictions of the component merging model. The clear anticorrelation between the magnitude of the east/west (Bm) perturbation observed within magnetosphere FTEs versus Bm in the magnetosheath also demands an explanation of the FTEs in terms of reconnection along a tilted subsolar merging line, e.g. in terms of component merging.

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A survey of magnetopause FTEs and associated flow bursts in the polar ionosphere

Cited by 60 publications

References 53 publications

Magnetopause and Boundary Layer

Magnetopause and Boundary Layer

Temporal versus spatial interpretation of cusp ion structures observed by two spacecraft

Interball-1 observations of flux transfer events

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