scholarly journals Sequential Observations of Flux Transfer Events, Poleward‐Moving Auroral Forms, and Polar Cap Patches

2020 ◽  
Vol 125 (6) ◽  
Author(s):  
K.‐J. Hwang ◽  
Y. Nishimura ◽  
A. J. Coster ◽  
R. G. Gillies ◽  
R. C. Fear ◽  
...  
Keyword(s):  
Polar Cap ◽  
Flux Transfer Events ◽  
Flux Transfer

scholarly journals Ground-based observations of the auroral zone and polar cap ionospheric responses to dayside transient reconnection

2002 ◽  
Vol 20 (6) ◽  
pp. 781-794 ◽  
Author(s):  
J. A. Davies ◽  
T. K. Yeoman ◽  
I. J. Rae ◽  
S. E. Milan ◽  
M. Lester ◽  
...  
Keyword(s):  
Electron Density ◽  
Plasma Density ◽  
Closed Field ◽  
Polar Cap ◽  
Incoherent Scatter Radar ◽  
Plasma Parameters ◽  
Flux Transfer Events ◽  
Incoherent Scatter ◽  
Scatter Radar ◽  
Flux Transfer

Abstract. Observations from the EISCAT VHF incoherent scatter radar system in northern Norway, during a run of the common programme CP-4, reveal a series of poleward-propagating F-region electron density enhancements in the pre-noon sector on 23 November 1999. These plasma density features, which are observed under conditions of a strongly southward interplanetary magnetic field, exhibit a recurrence rate of under 10 min and appear to emanate from the vicinity of the open/closed field-line boundary from where they travel into the polar cap; this is suggestive of their being an ionospheric response to transient reconnection at the day-side magnetopause (flux transfer events). Simultaneous with the density structures detected by the VHF radar, poleward-moving radar auroral forms (PMRAFs) are observed by the Finland HF coherent scatter radar. It is thought that PM-RAFs, which are commonly observed near local noon by HF radars, are also related to flux transfer events, although the specific mechanism for the generation of the field-aligned irregularities within such features is not well understood. The HF observations suggest, that for much of their existence, the PMRAFs trace fossil signatures of transient reconnection rather than revealing the footprint of active reconnection itself; this is evidenced not least by the fact that the PMRAFs become narrower in spectral width as they evolve away from the region of more classical, broad cusp scatter in which they originate. Interpretation of the HF observations with reference to the plasma parameters diagnosed by the incoherent scatter radar suggests that as the PMRAFs migrate away from the reconnection site and across the polar cap, entrained in the ambient antisunward flow, the irregularities therein are generated by the presence of gradients in the electron density, with these gradients having been formed through structuring of the ionosphere in the cusp region in response to transient reconnection.Key words. Magnetospheric physics (magnetosphere-ionosphere interaction) – ionosphere (ionospheric irregularities; plasma density and temperature)

High spatial and temporal resolution observations of the ionospheric cusp

1995 ◽  
Vol 13 (9) ◽  
pp. 919-925 ◽  
Author(s):  
M. Pinnock ◽  
A. S. Rodger ◽  
J. R. Dudeney ◽  
F. Rich ◽  
K. B. Baker
Keyword(s):  
Boundary Layer ◽  
Short Duration ◽  
Conclusive Evidence ◽  
Hf Radar ◽  
Polar Cap ◽  
Low Latitude ◽  
Flux Transfer Events ◽  
Flux Transfer ◽  
Very High ◽  
Low Latitude Boundary Layer

Abstract. The Halley PACE HF radar has been operated in a new mode to provide very high time (10 s) and space (15 km) resolution measurements of the iono-spheric signatures of the cusp and the low-latitude boundary layer. The first data show that the iono-spheric signature of flux transfer events occur up to 300 km equatorward of regions showing the HF characteristics of the ionospheric cusp. Whilst larger flux transfer events are seen, on average, every 7 min, many much smaller and short-duration events have been identified. On one occasion DMSP data have been used to show that at least four flux transfer events are occurring simultaneously at the edge of the cusp over 2 h of MLT. There is strong, but not conclusive evidence, that reconnection at the magnetopause is both intermittent and patchy. These data also suggest that flux transfer events can be a significant contributor to the cross-polar cap potential.

The Effect of Solar Wind Mach Numbers on the Occurrence Rate of Flux Transfer Events at the Dayside Magnetopause

2019 ◽  
Vol 46 (8) ◽  
pp. 4106-4113 ◽  
Author(s):  
C. Chen ◽  
T. R. Sun ◽  
C. Wang ◽  
Z. H. Huang ◽  
B. B. Tang ◽  
...  
Keyword(s):  
Solar Wind ◽  
Occurrence Rate ◽  
Flux Transfer Events ◽  
Dayside Magnetopause ◽  
Mach Numbers ◽  
Flux Transfer

scholarly journals Flux transfer events: Scale size and interior structure

1984 ◽  
Vol 11 (2) ◽  
pp. 131-134 ◽  
Author(s):  
M. A. Saunders ◽  
C. T. Russell ◽  
N. Sckopke
Keyword(s):  
Interior Structure ◽  
Flux Transfer Events ◽  
Scale Size ◽  
Flux Transfer

Observations of a possible ground signature of flux transfer events

1985 ◽  
Vol 90 (A5) ◽  
pp. 4069 ◽  
Author(s):  
C. K. Goertz ◽  
E. Nielsen ◽  
A. Korth ◽  
K. H. Glassmeier ◽  
C. Haldoupis ◽  
...  
Keyword(s):  
Flux Transfer Events ◽  
Flux Transfer

scholarly journals The Influence of IMF Clock Angle on Dayside Flux Transfer Events at Mercury

2017 ◽  
Vol 44 (21) ◽  
Author(s):  
Roger P. Leyser ◽  
Suzanne M. Imber ◽  
Stephen E. Milan ◽  
James A. Slavin
Keyword(s):  
Flux Transfer Events ◽  
Flux Transfer ◽  
Imf Clock Angle

Plasma and magnetic field characteristics of magnetic flux transfer events

1982 ◽  
Vol 87 (A4) ◽  
pp. 2159 ◽  
Author(s):  
G. Paschmann ◽  
G. Haerendel ◽  
I. Papamastorakis ◽  
N. Sckopke ◽  
S. J. Bame ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Flux Transfer Events ◽  
Flux Transfer

scholarly journals Structure and evolution of flux transfer events near dayside magnetic reconnection dissipation region: MMS observations

2017 ◽  
Vol 44 (12) ◽  
pp. 5951-5959 ◽  
Author(s):  
X.-C. Dong ◽  
M. W. Dunlop ◽  
K. J. Trattner ◽  
T. D. Phan ◽  
H.-S. Fu ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Flux Transfer Events ◽  
Flux Transfer

THEMIS observations of the dayside traveling compression region and flows surrounding flux transfer events

2008 ◽  
Vol 35 (17) ◽  
Author(s):  
J. Liu ◽  
V. Angelopoulos ◽  
D. Sibeck ◽  
T. Phan ◽  
Z. Y. Pu ◽  
...  
Keyword(s):  
Flux Transfer Events ◽  
Compression Region ◽  
Flux Transfer

scholarly journals The magnetic and plasma structure of flux transfer events

1999 ◽  
Vol 104 (A1) ◽  
pp. 233-245 ◽  
Author(s):  
G. Le ◽  
J. T. Gosling ◽  
C. T. Russell ◽  
R. C. Elphic ◽  
M. F. Thomsen ◽  
...  
Keyword(s):  
Plasma Structure ◽  
Flux Transfer Events ◽  
Flux Transfer
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