Ionospheric Footprints of Detached Magnetotail Interchange Heads

E. V. Panov, W. Baumjohann, Rumi Nakamura, P. L. Pritchett, J. M. Weygand, M. V. Kubyshkina

Результат исследований: Научные публикации в периодических изданияхстатья

6 Цитирования (Scopus)

Аннотация

Pritchett and Coroniti (2011, https://doi.org/10.1029/2011GL047527, 2013, https://doi.org/10.1029/2012JA018143) have predicted that the kinetic ballooning/interchange instability (BICI) can provoke reconnection onsets that lead to detached azimuthally thin earthward intrusions (heads) of depleted plasma tubes when βeq ≤ 100. Such detached BICI heads would be seen as localized earthward-propagating dipolarization fronts. Using Time History of Events and Macroscale Interactions during Substorms observations in the plasma sheet at XGSM≈−11RE and conjugate All-Sky Imager and magnetometer networks observations on the ground, we show four examples when prominent dipolarization fronts with moderate earthward flows were observed amidst azimuthally drifting interchange heads and concurrently with the ionospheric current intensifications near Time History of Events and Macroscale Interactions during Substorms footprints and auroral bright spots originating from dimmer azimuthal beads/rays. These events support the idea that some of the BICI heads detach from the region with reversed radial gradient of BZ due to local reconnection. The detached BICI heads propagate earthward-driving ionospheric pseudo-breakups.

Язык оригиналаанглийский
Страницы (с-по)7237-7247
Число страниц11
ЖурналGeophysical Research Letters
Том46
Номер выпуска13
DOI
СостояниеОпубликовано - 16 июл 2019

Предметные области Scopus

  • Геофизика
  • Планетоведение и науки о земле (все)

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