Thu Apr 10, F. Flechtner
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Zhou, Yun-Liang, Lühr, Hermann, Xiong, Chao, and Pfaff, Robert F., 2016. Ionospheric storm effects and equatorial plasma irregularities during the 17-18 March 2015 event. Journal of Geophysical Research (Space Physics), 121(9):9146–9163, doi:10.1002/2016JA023122.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2016JGRA..121.9146Z,
author = {{Zhou}, Yun-Liang and {L{\"u}hr}, Hermann and {Xiong}, Chao and {Pfaff}, Robert F.},
title = "{Ionospheric storm effects and equatorial plasma irregularities during the 17-18 March 2015 event}",
journal = {Journal of Geophysical Research (Space Physics)},
keywords = {ionospheric storms, equatorial plasma irregularities, prompt penetration electric field, disturbance dynamo electric field},
year = 2016,
month = sep,
volume = {121},
number = {9},
pages = {9146-9163},
abstract = "{The intense magnetic storm on 17-18 March 2015 caused large disturbances
of the ionosphere. Based on the plasma density (Ni) observations
performed by the Swarm fleet of satellites, the Gravity Recovery
and Climate Experiment mission, and the
Communications/Navigation Outage Forecasting System satellite,
we characterize the storm-related perturbations at low
latitudes. All these satellites sampled the ionosphere in
morning and evening time sectors where large modifications
occurred. Modifications of plasma density are closely related to
changes of the solar wind merging electric field (E$_{m}$). We
consider two mechanisms, prompt penetration electric field
(PPEF) and disturbance dynamo electric field (DDEF), as the main
cause for the Ni redistribution, but effects of meridional wind
are also taken into account. At the start of the storm main
phase, the PPEF is enhancing plasma density on the dayside and
reducing it on the nightside. Later, DDEF takes over and causes
the opposite reaction. Unexpectedly, there appears during the
recovery phase a strong density enhancement in the
morning/prenoon sector and a severe Ni reduction in the
afternoon/evening sector, and we suggest a combined effect of
vertical plasma drift, and meridional wind is responsible for
these ionospheric storm effects. Different from earlier studies
about this storm, we also investigate the influence of storm
dynamics on the initiation of equatorial plasma irregularities
(EPIs). Shortly after the start of the storm main phase, EPIs
appear in the postsunset sector. As a response to a short-lived
decline of E$_{m}$, EPI activity appears in the early morning
sector. Following the second start of the main phase, EPIs are
generated for a few hours in the late evening sector. However,
for the rest of the storm main phase, no more EPIs are initiated
for more than 12 h. Only after the onset of recovery phase does
EPI activity start again in the postmidnight sector, lasting
more than 7 h. This comprehensive view of ionospheric storm
effects and plasma irregularities adds to our understanding of
conditions that lead to ionospheric instabilities.}",
doi = {10.1002/2016JA023122},
adsurl = {https://ui.adsabs.harvard.edu/abs/2016JGRA..121.9146Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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