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Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe

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Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe. / Lockwood, M.; Opgenoorth, H. J.; van Eyken, A. P. et al.
In: Annales Geophysicae, Vol. 19, No. 10, 2001, p. 1589-1612.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Lockwood, M, Opgenoorth, HJ, van Eyken, AP, Fazakerley, AN, Bosqued, JM, Denig, WF, Wild, JA, Cully, C, Greenwald, RA, Lu, G, Amm, O, Strömme, A, Prikryl, P, Hapgood, MA, Wild, MN, Stamper, R, Taylor, MGGT, McCrea, IW, Kauristie, K, Pulkkinen, TI, Pitout, F, Balogh, A, Dunlop, MW, Rème, H, Behlke, R, Hansen, TL, Provan, G, Eglitis, P, Morley, SK, Alcaydé, D, Blelly, P-L, Moen, J, Donovan, EF, Engebretson, MJ, Lester, M, Watermann, JF & Marcucci, MF 2001, 'Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe', Annales Geophysicae, vol. 19, no. 10, pp. 1589-1612. https://doi.org/10.5194/angeo-19-1589-2001

APA

Lockwood, M., Opgenoorth, H. J., van Eyken, A. P., Fazakerley, A. N., Bosqued, J. M., Denig, W. F., Wild, J. A., Cully, C., Greenwald, R. A., Lu, G., Amm, O., Strömme, A., Prikryl, P., Hapgood, M. A., Wild, M. N., Stamper, R., Taylor, M. G. G. T., McCrea, I. W., Kauristie, K., ... Marcucci, M. F. (2001). Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe. Annales Geophysicae, 19(10), 1589-1612. https://doi.org/10.5194/angeo-19-1589-2001

Vancouver

Lockwood M, Opgenoorth HJ, van Eyken AP, Fazakerley AN, Bosqued JM, Denig WF et al. Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe. Annales Geophysicae. 2001;19(10):1589-1612. doi: 10.5194/angeo-19-1589-2001

Author

Lockwood, M. ; Opgenoorth, H. J. ; van Eyken, A. P. et al. / Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe. In: Annales Geophysicae. 2001 ; Vol. 19, No. 10. pp. 1589-1612.

Bibtex

@article{cb5eba02d48b4f3c892fd88175cc9ec5,
title = "Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe",
abstract = "During the interval between 8:00–9:30 on 14 January 2001, the four Cluster spacecraft were moving from the central magnetospheric lobe, through the dusk sector mantle, on their way towards intersecting the magnetopause near 15:00 MLT and 15:00 UT. Throughout this interval, the EISCAT Svalbard Radar (ESR) at Longyearbyen observed a series of poleward-moving transient events of enhanced F-region plasma concentration (“polar cap patches”), with a repetition period of the order of 10 min. Allowing for the estimated solar wind propagation delay of 75 (±5)min, the interplanetary magnetic field (IMF) had a southward component during most of the interval. The magnetic footprint of the Cluster spacecraft, mapped to the ionosphere using the Tsyganenko T96 model (with input conditions prevailing during this event), was to the east of the ESR beams. Around 09:05 UT, the DMSP-F12 satellite flew over the ESR and showed a sawtooth cusp ion dispersion signature that also extended into the electrons on the equatorward edge of the cusp, revealing a pulsed magnetopause reconnection. The consequent enhanced ionospheric flow events were imaged by the SuperDARN HF backscatter radars. The average convection patterns (derived using the AMIE technique on data from the magnetometers, the EISCAT and SuperDARN radars, and the DMSP satellites) show that the associated poleward-moving events also convected over the predicted footprint of the Cluster spacecraft. Cluster observed enhancements in the fluxes of both electrons and ions. These events were found to be essentially identical at all four spacecraft, indicating that they had a much larger spatial scale than the satellite separation of the order of 600 km. Some of the events show a correspondence between the lowest energy magnetosheath electrons detected by the PEACE instrument on Cluster (10–20 eV) and the topside ionospheric enhancements seen by the ESR (at 400–700 km). We suggest that a potential barrier at the magnetopause, which prevents the lowest energy electrons from entering the magnetosphere, is reduced when and where the boundary-normal magnetic field is enhanced and that the observed polar cap patches are produced by the consequent enhanced precipitation of the lowest energy electrons, making them and the low energy electron precipitation fossil remnants of the magnetopause reconnection rate pulses.",
keywords = "Cluster, EISCAT, SuperDARN, magnetometer, amie DCS-publications-id, art-681, DCS-publications-credits, samnet, DCS-publications-personnel-id, 104",
author = "M. Lockwood and Opgenoorth, {H. J.} and {van Eyken}, {A. P.} and Fazakerley, {A. N.} and Bosqued, {J. M.} and Denig, {W. F.} and Wild, {J. A.} and C. Cully and Greenwald, {R. A.} and G. Lu and O. Amm and A. Str{\"o}mme and P. Prikryl and Hapgood, {M. A.} and Wild, {M. N.} and R. Stamper and Taylor, {M. G. G. T.} and McCrea, {I. W.} and K. Kauristie and Pulkkinen, {T. I.} and F. Pitout and A. Balogh and Dunlop, {M. W.} and H. R{\`e}me and R. Behlke and Hansen, {T. L.} and G. Provan and P. Eglitis and Morley, {S. K.} and D. Alcayd{\'e} and P.-L. Blelly and J. Moen and Donovan, {E. F.} and Engebretson, {M. J.} and M. Lester and Watermann, {J. F.} and Marcucci, {M. F.}",
year = "2001",
doi = "10.5194/angeo-19-1589-2001",
language = "English",
volume = "19",
pages = "1589--1612",
journal = "Annales Geophysicae",
issn = "0992-7689",
publisher = "European Geosciences Union",
number = "10",

}

RIS

TY - JOUR

T1 - Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe

AU - Lockwood, M.

AU - Opgenoorth, H. J.

AU - van Eyken, A. P.

AU - Fazakerley, A. N.

AU - Bosqued, J. M.

AU - Denig, W. F.

AU - Wild, J. A.

AU - Cully, C.

AU - Greenwald, R. A.

AU - Lu, G.

AU - Amm, O.

AU - Strömme, A.

AU - Prikryl, P.

AU - Hapgood, M. A.

AU - Wild, M. N.

AU - Stamper, R.

AU - Taylor, M. G. G. T.

AU - McCrea, I. W.

AU - Kauristie, K.

AU - Pulkkinen, T. I.

AU - Pitout, F.

AU - Balogh, A.

AU - Dunlop, M. W.

AU - Rème, H.

AU - Behlke, R.

AU - Hansen, T. L.

AU - Provan, G.

AU - Eglitis, P.

AU - Morley, S. K.

AU - Alcaydé, D.

AU - Blelly, P.-L.

AU - Moen, J.

AU - Donovan, E. F.

AU - Engebretson, M. J.

AU - Lester, M.

AU - Watermann, J. F.

AU - Marcucci, M. F.

PY - 2001

Y1 - 2001

N2 - During the interval between 8:00–9:30 on 14 January 2001, the four Cluster spacecraft were moving from the central magnetospheric lobe, through the dusk sector mantle, on their way towards intersecting the magnetopause near 15:00 MLT and 15:00 UT. Throughout this interval, the EISCAT Svalbard Radar (ESR) at Longyearbyen observed a series of poleward-moving transient events of enhanced F-region plasma concentration (“polar cap patches”), with a repetition period of the order of 10 min. Allowing for the estimated solar wind propagation delay of 75 (±5)min, the interplanetary magnetic field (IMF) had a southward component during most of the interval. The magnetic footprint of the Cluster spacecraft, mapped to the ionosphere using the Tsyganenko T96 model (with input conditions prevailing during this event), was to the east of the ESR beams. Around 09:05 UT, the DMSP-F12 satellite flew over the ESR and showed a sawtooth cusp ion dispersion signature that also extended into the electrons on the equatorward edge of the cusp, revealing a pulsed magnetopause reconnection. The consequent enhanced ionospheric flow events were imaged by the SuperDARN HF backscatter radars. The average convection patterns (derived using the AMIE technique on data from the magnetometers, the EISCAT and SuperDARN radars, and the DMSP satellites) show that the associated poleward-moving events also convected over the predicted footprint of the Cluster spacecraft. Cluster observed enhancements in the fluxes of both electrons and ions. These events were found to be essentially identical at all four spacecraft, indicating that they had a much larger spatial scale than the satellite separation of the order of 600 km. Some of the events show a correspondence between the lowest energy magnetosheath electrons detected by the PEACE instrument on Cluster (10–20 eV) and the topside ionospheric enhancements seen by the ESR (at 400–700 km). We suggest that a potential barrier at the magnetopause, which prevents the lowest energy electrons from entering the magnetosphere, is reduced when and where the boundary-normal magnetic field is enhanced and that the observed polar cap patches are produced by the consequent enhanced precipitation of the lowest energy electrons, making them and the low energy electron precipitation fossil remnants of the magnetopause reconnection rate pulses.

AB - During the interval between 8:00–9:30 on 14 January 2001, the four Cluster spacecraft were moving from the central magnetospheric lobe, through the dusk sector mantle, on their way towards intersecting the magnetopause near 15:00 MLT and 15:00 UT. Throughout this interval, the EISCAT Svalbard Radar (ESR) at Longyearbyen observed a series of poleward-moving transient events of enhanced F-region plasma concentration (“polar cap patches”), with a repetition period of the order of 10 min. Allowing for the estimated solar wind propagation delay of 75 (±5)min, the interplanetary magnetic field (IMF) had a southward component during most of the interval. The magnetic footprint of the Cluster spacecraft, mapped to the ionosphere using the Tsyganenko T96 model (with input conditions prevailing during this event), was to the east of the ESR beams. Around 09:05 UT, the DMSP-F12 satellite flew over the ESR and showed a sawtooth cusp ion dispersion signature that also extended into the electrons on the equatorward edge of the cusp, revealing a pulsed magnetopause reconnection. The consequent enhanced ionospheric flow events were imaged by the SuperDARN HF backscatter radars. The average convection patterns (derived using the AMIE technique on data from the magnetometers, the EISCAT and SuperDARN radars, and the DMSP satellites) show that the associated poleward-moving events also convected over the predicted footprint of the Cluster spacecraft. Cluster observed enhancements in the fluxes of both electrons and ions. These events were found to be essentially identical at all four spacecraft, indicating that they had a much larger spatial scale than the satellite separation of the order of 600 km. Some of the events show a correspondence between the lowest energy magnetosheath electrons detected by the PEACE instrument on Cluster (10–20 eV) and the topside ionospheric enhancements seen by the ESR (at 400–700 km). We suggest that a potential barrier at the magnetopause, which prevents the lowest energy electrons from entering the magnetosphere, is reduced when and where the boundary-normal magnetic field is enhanced and that the observed polar cap patches are produced by the consequent enhanced precipitation of the lowest energy electrons, making them and the low energy electron precipitation fossil remnants of the magnetopause reconnection rate pulses.

KW - Cluster

KW - EISCAT

KW - SuperDARN

KW - magnetometer

KW - amie DCS-publications-id

KW - art-681

KW - DCS-publications-credits

KW - samnet

KW - DCS-publications-personnel-id

KW - 104

U2 - 10.5194/angeo-19-1589-2001

DO - 10.5194/angeo-19-1589-2001

M3 - Journal article

VL - 19

SP - 1589

EP - 1612

JO - Annales Geophysicae

JF - Annales Geophysicae

SN - 0992-7689

IS - 10

ER -