Home > Research > Publications & Outputs > Subsidence of Ionospheric Flows Triggered by Ma...

Associated organisational unit

Electronic data

Links

Text available via DOI:

View graph of relations

Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening

Research output: Contribution to journalJournal articlepeer-review

Published

Standard

Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening. / Nowada, Motoharu; Fear, R.C.; Grocott, Adrian; Shi, Quad-Qi; Yang, Jun; Zong, Liu-Gang; Wei, Yong; Fu, Sui-Yan; Pu, Zu-Yin; Mailyan, Bagrat; Zhang, Hui.

In: Journal of Geophysical Research: Space Physics, Vol. 123, No. 5, 05.2018, p. 3398-3420.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Nowada, M, Fear, RC, Grocott, A, Shi, Q-Q, Yang, J, Zong, L-G, Wei, Y, Fu, S-Y, Pu, Z-Y, Mailyan, B & Zhang, H 2018, 'Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening', Journal of Geophysical Research: Space Physics, vol. 123, no. 5, pp. 3398-3420. https://doi.org/10.1029/2017ja024701

APA

Nowada, M., Fear, R. C., Grocott, A., Shi, Q-Q., Yang, J., Zong, L-G., Wei, Y., Fu, S-Y., Pu, Z-Y., Mailyan, B., & Zhang, H. (2018). Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening. Journal of Geophysical Research: Space Physics, 123(5), 3398-3420. https://doi.org/10.1029/2017ja024701

Vancouver

Nowada M, Fear RC, Grocott A, Shi Q-Q, Yang J, Zong L-G et al. Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening. Journal of Geophysical Research: Space Physics. 2018 May;123(5):3398-3420. https://doi.org/10.1029/2017ja024701

Author

Nowada, Motoharu ; Fear, R.C. ; Grocott, Adrian ; Shi, Quad-Qi ; Yang, Jun ; Zong, Liu-Gang ; Wei, Yong ; Fu, Sui-Yan ; Pu, Zu-Yin ; Mailyan, Bagrat ; Zhang, Hui. / Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening. In: Journal of Geophysical Research: Space Physics. 2018 ; Vol. 123, No. 5. pp. 3398-3420.

Bibtex

@article{7c4d888263c2456b8cc52938095bf2ee,
title = "Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening",
abstract = "A transpolar arc (TPA), which extended from postmidnight to prenoon, was seen on 16 September 2001 in the Northern Hemisphere under northward interplanetary magnetic field (IMF)‐Bz and weakly dawnward IMF‐By conditions. Super Dual Auroral Radar Network detected significant westward plasma flows just equatorward of the poleward edge of the midnight sector auroral oval. These plasma flows were confined to closed field lines and are identified as the ionospheric plasma flow signature of tail reconnection during IMF northward nonsubstorm intervals (TRINNIs). These TRINNI flows persisted for 53 min from prior to the TPA appearance to the cessation of TPA growth. They are usually observed before (and during) intervals when TPAs are present, but in this case, subsided after the TPA was completely connected to the dayside. Additional slower flows across the open/closed polar cap boundary were seen at the TPA onset time in the same magnetic local time sector as the nightside end of the TPA. These ionospheric flows suggest that magnetotail reconnection significantly contributed to the TPA formation, as proposed by Milan et al. (2005, https://doi.org/10.1029/2004JA010835). We propose a possible scenario for an absence of the TRINNI flows during the TPA brightening by considering the relation between the extent of the magnetotail reconnection line mapped onto nightside auroral oval and the TPA width; TRINNI flows would subside when the extent of X‐line is comparable to the TPA width. Therefore, our results suggest that the fate (absence or presence) of TRINNI flows on closed field lines during the TPA formation would be closely related with magnetotail reconnection extent.",
keywords = "transpolar arc and its formation, lobe and magnetotail magnetic reconnections, ionospheric plasma flows, TRINNIs",
author = "Motoharu Nowada and R.C. Fear and Adrian Grocott and Quad-Qi Shi and Jun Yang and Liu-Gang Zong and Yong Wei and Sui-Yan Fu and Zu-Yin Pu and Bagrat Mailyan and Hui Zhang",
year = "2018",
month = may,
doi = "10.1029/2017ja024701",
language = "English",
volume = "123",
pages = "3398--3420",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9402",
publisher = "Blackwell Publishing Ltd",
number = "5",

}

RIS

TY - JOUR

T1 - Subsidence of Ionospheric Flows Triggered by Magnetotail Magnetic Reconnection During Transpolar Arc Brightening

AU - Nowada, Motoharu

AU - Fear, R.C.

AU - Grocott, Adrian

AU - Shi, Quad-Qi

AU - Yang, Jun

AU - Zong, Liu-Gang

AU - Wei, Yong

AU - Fu, Sui-Yan

AU - Pu, Zu-Yin

AU - Mailyan, Bagrat

AU - Zhang, Hui

PY - 2018/5

Y1 - 2018/5

N2 - A transpolar arc (TPA), which extended from postmidnight to prenoon, was seen on 16 September 2001 in the Northern Hemisphere under northward interplanetary magnetic field (IMF)‐Bz and weakly dawnward IMF‐By conditions. Super Dual Auroral Radar Network detected significant westward plasma flows just equatorward of the poleward edge of the midnight sector auroral oval. These plasma flows were confined to closed field lines and are identified as the ionospheric plasma flow signature of tail reconnection during IMF northward nonsubstorm intervals (TRINNIs). These TRINNI flows persisted for 53 min from prior to the TPA appearance to the cessation of TPA growth. They are usually observed before (and during) intervals when TPAs are present, but in this case, subsided after the TPA was completely connected to the dayside. Additional slower flows across the open/closed polar cap boundary were seen at the TPA onset time in the same magnetic local time sector as the nightside end of the TPA. These ionospheric flows suggest that magnetotail reconnection significantly contributed to the TPA formation, as proposed by Milan et al. (2005, https://doi.org/10.1029/2004JA010835). We propose a possible scenario for an absence of the TRINNI flows during the TPA brightening by considering the relation between the extent of the magnetotail reconnection line mapped onto nightside auroral oval and the TPA width; TRINNI flows would subside when the extent of X‐line is comparable to the TPA width. Therefore, our results suggest that the fate (absence or presence) of TRINNI flows on closed field lines during the TPA formation would be closely related with magnetotail reconnection extent.

AB - A transpolar arc (TPA), which extended from postmidnight to prenoon, was seen on 16 September 2001 in the Northern Hemisphere under northward interplanetary magnetic field (IMF)‐Bz and weakly dawnward IMF‐By conditions. Super Dual Auroral Radar Network detected significant westward plasma flows just equatorward of the poleward edge of the midnight sector auroral oval. These plasma flows were confined to closed field lines and are identified as the ionospheric plasma flow signature of tail reconnection during IMF northward nonsubstorm intervals (TRINNIs). These TRINNI flows persisted for 53 min from prior to the TPA appearance to the cessation of TPA growth. They are usually observed before (and during) intervals when TPAs are present, but in this case, subsided after the TPA was completely connected to the dayside. Additional slower flows across the open/closed polar cap boundary were seen at the TPA onset time in the same magnetic local time sector as the nightside end of the TPA. These ionospheric flows suggest that magnetotail reconnection significantly contributed to the TPA formation, as proposed by Milan et al. (2005, https://doi.org/10.1029/2004JA010835). We propose a possible scenario for an absence of the TRINNI flows during the TPA brightening by considering the relation between the extent of the magnetotail reconnection line mapped onto nightside auroral oval and the TPA width; TRINNI flows would subside when the extent of X‐line is comparable to the TPA width. Therefore, our results suggest that the fate (absence or presence) of TRINNI flows on closed field lines during the TPA formation would be closely related with magnetotail reconnection extent.

KW - transpolar arc and its formation

KW - lobe and magnetotail magnetic reconnections

KW - ionospheric plasma flows

KW - TRINNIs

U2 - 10.1029/2017ja024701

DO - 10.1029/2017ja024701

M3 - Journal article

VL - 123

SP - 3398

EP - 3420

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9402

IS - 5

ER -