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Modulation of dayside reconnection during northward interplanetary magnetic field

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Modulation of dayside reconnection during northward interplanetary magnetic field. / Provan, G.; Lester, M.; Cowley, S. W. H.; Grocott, A.; Milan, S. E.; Hubert, B.; Khan, Hina .

In: Journal of Geophysical Research, Vol. 110, No. A10, A10211, 20.10.2005.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Provan, G, Lester, M, Cowley, SWH, Grocott, A, Milan, SE, Hubert, B & Khan, H 2005, 'Modulation of dayside reconnection during northward interplanetary magnetic field', Journal of Geophysical Research, vol. 110, no. A10, A10211. https://doi.org/10.1029/2004JA010980

APA

Provan, G., Lester, M., Cowley, S. W. H., Grocott, A., Milan, S. E., Hubert, B., & Khan, H. (2005). Modulation of dayside reconnection during northward interplanetary magnetic field. Journal of Geophysical Research, 110(A10), [A10211]. https://doi.org/10.1029/2004JA010980

Vancouver

Provan G, Lester M, Cowley SWH, Grocott A, Milan SE, Hubert B et al. Modulation of dayside reconnection during northward interplanetary magnetic field. Journal of Geophysical Research. 2005 Oct 20;110(A10). A10211. https://doi.org/10.1029/2004JA010980

Author

Provan, G. ; Lester, M. ; Cowley, S. W. H. ; Grocott, A. ; Milan, S. E. ; Hubert, B. ; Khan, Hina . / Modulation of dayside reconnection during northward interplanetary magnetic field. In: Journal of Geophysical Research. 2005 ; Vol. 110, No. A10.

Bibtex

@article{7a2cbe9fcf964068acc2c774e459ace3,
title = "Modulation of dayside reconnection during northward interplanetary magnetic field",
abstract = " On 17 September 2000 the IMF was directed continuously northward for more than 3 hours. Density fluctuations in the solar wind resulted in quasiperiodic variations in the solar wind dynamic pressure, and correlated fluctuations also occurred in the IMF Bz component. The Northern Hemisphere SuperDARN radars observed bursts of high-latitude high-velocity plasma flow during this northward IMF interval, both when ionospheric signatures consistent with low-latitude merging were observed and when lobe merging was occurring. On average the recurrence period of these flow bursts was ∼22 min. During this time the SI-12 spectrographic imager channel on the IMAGE spacecraft observed the dayside proton auroral spot continuously (Frey et al., 2003a). The brightness of the auroral spot varied over time. Here we find a direct correlation between the occurrence of bursts of plasma flow and periodic fluctuations in the brightness of the proton auroral spot. Our results suggest that correlated fluctuations in the solar wind dynamic pressure and IMF Bz component modulated ionospheric precipitation and dayside reconnection, resulting in fluctuations in the brightness of the proton auroral spot and periodic variations in the dayside high-latitude plasma flow.",
keywords = "aurora, cusp, reconnection, INTERPLANETARY MAGNETIC-FIELD",
author = "G. Provan and M. Lester and Cowley, {S. W. H.} and A. Grocott and Milan, {S. E.} and B. Hubert and Hina Khan",
note = "Copyright 2005 by the American Geophysical Union.",
year = "2005",
month = oct,
day = "20",
doi = "10.1029/2004JA010980",
language = "English",
volume = "110",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "A10",

}

RIS

TY - JOUR

T1 - Modulation of dayside reconnection during northward interplanetary magnetic field

AU - Provan, G.

AU - Lester, M.

AU - Cowley, S. W. H.

AU - Grocott, A.

AU - Milan, S. E.

AU - Hubert, B.

AU - Khan, Hina

N1 - Copyright 2005 by the American Geophysical Union.

PY - 2005/10/20

Y1 - 2005/10/20

N2 - On 17 September 2000 the IMF was directed continuously northward for more than 3 hours. Density fluctuations in the solar wind resulted in quasiperiodic variations in the solar wind dynamic pressure, and correlated fluctuations also occurred in the IMF Bz component. The Northern Hemisphere SuperDARN radars observed bursts of high-latitude high-velocity plasma flow during this northward IMF interval, both when ionospheric signatures consistent with low-latitude merging were observed and when lobe merging was occurring. On average the recurrence period of these flow bursts was ∼22 min. During this time the SI-12 spectrographic imager channel on the IMAGE spacecraft observed the dayside proton auroral spot continuously (Frey et al., 2003a). The brightness of the auroral spot varied over time. Here we find a direct correlation between the occurrence of bursts of plasma flow and periodic fluctuations in the brightness of the proton auroral spot. Our results suggest that correlated fluctuations in the solar wind dynamic pressure and IMF Bz component modulated ionospheric precipitation and dayside reconnection, resulting in fluctuations in the brightness of the proton auroral spot and periodic variations in the dayside high-latitude plasma flow.

AB - On 17 September 2000 the IMF was directed continuously northward for more than 3 hours. Density fluctuations in the solar wind resulted in quasiperiodic variations in the solar wind dynamic pressure, and correlated fluctuations also occurred in the IMF Bz component. The Northern Hemisphere SuperDARN radars observed bursts of high-latitude high-velocity plasma flow during this northward IMF interval, both when ionospheric signatures consistent with low-latitude merging were observed and when lobe merging was occurring. On average the recurrence period of these flow bursts was ∼22 min. During this time the SI-12 spectrographic imager channel on the IMAGE spacecraft observed the dayside proton auroral spot continuously (Frey et al., 2003a). The brightness of the auroral spot varied over time. Here we find a direct correlation between the occurrence of bursts of plasma flow and periodic fluctuations in the brightness of the proton auroral spot. Our results suggest that correlated fluctuations in the solar wind dynamic pressure and IMF Bz component modulated ionospheric precipitation and dayside reconnection, resulting in fluctuations in the brightness of the proton auroral spot and periodic variations in the dayside high-latitude plasma flow.

KW - aurora

KW - cusp

KW - reconnection

KW - INTERPLANETARY MAGNETIC-FIELD

U2 - 10.1029/2004JA010980

DO - 10.1029/2004JA010980

M3 - Journal article

VL - 110

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - A10

M1 - A10211

ER -