dc.contributor.author |
Bagiya, Mala S. |
|
dc.contributor.author |
Vichare, Geeta |
|
dc.contributor.author |
Sinha, Ashwini K. |
|
dc.contributor.author |
Sripathi, S. |
|
dc.date.accessioned |
2011-03-13T01:22:29Z |
|
dc.date.accessioned |
2021-02-12T10:10:11Z |
|
dc.date.available |
2011-03-13T01:22:29Z |
|
dc.date.available |
2021-02-12T10:10:11Z |
|
dc.date.issued |
2018 |
|
dc.identifier.citation |
Journal of Geophysical Research, 123, 1618–1626, doi: 10.1002/2017JA024703 |
en_US |
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/1205 |
|
dc.description.abstract |
During quiet period, the nocturnal equatorial ionospheric plasma drifts eastward in the zonal
direction and downward in the vertical direction. This quiet time drift pattern could be understood
through dynamo processes in the nighttime equatorial ionosphere. The present case study reports the
nocturnal simultaneous occurrence of the vertically downward and zonally westward plasma drifts over the
Indian latitudes during the geomagnetic storm of 17 March 2015. After ~17:00 UT (~22:10 local time), the
vertical plasma drift became downward and coincided with the westward zonal drift, a rarely observed
feature of low latitude plasma drifts. The vertical drift turned upward after ~18:00 UT, while the zonal drift
became eastward. We mainly emphasize here the distinct bipolar type variations of vertical and zonal plasma
drifts observed around 18:00 UT. We explain the vertical plasma drift in terms of the competing effects
between the storm time prompt penetration and disturbance dynamo electric fields. Whereas, the westward
drift is attributed to the storm time local electrodynamical changes mainly through the disturbance dynamo
field in addition to the vertical Pedersen current arising from the spatial (longitudinal) gradient of the field
aligned Pedersen conductivity. |
en_US |
dc.language.iso |
en_US |
en_US |
dc.subject |
Electrodynamics |
en_US |
dc.subject |
Geomagnetic Storm |
en_US |
dc.subject |
Plasma drifts |
en_US |
dc.subject |
Equatorial ionospheric plasma drifts |
en_US |
dc.subject |
Electrodynamical changes |
en_US |
dc.title |
On the Nocturnal Downward and Westward Equatorial Ionospheric Plasma Drifts During the 17 March 2015 Geomagnetic Storm |
en_US |
dc.type |
Article |
en_US |
dc.identifier.accession |
091739 |
|