Lifetime of a polarization jet during long-term magnetic storms

The paper examines conditions of occurrence and typical time scales of a polarization jet by measuring ionospheric parameters from DMSP satellites (h~830 km) and using data from the ground-based ionospheric station Yakutsk (YA462) during strong and long-term geomagnetic storms. The polarization jet...

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Bibliographic Details
Published in:Solar-Terrestrial Physics
Main Authors: Stepanov A. E., Danilov S. I., Baishev D. G., Khalipov V. L., Kotova G. A.
Format: Article in Journal/Newspaper
Language:English
Published: INFRA-M 2024
Subjects:
ionosphere
magnetosphere
polarization jet
sme index
plasma drift
narrow dip
magnetic storm and substorm
Astrophysics
QB460-466
Yakutsk
Online Access:https://doi.org/10.12737/stp-102202405
https://doaj.org/article/74676aa7786540e7b12543556b20e7cc
Description
Summary:The paper examines conditions of occurrence and typical time scales of a polarization jet by measuring ionospheric parameters from DMSP satellites (h~830 km) and using data from the ground-based ionospheric station Yakutsk (YA462) during strong and long-term geomagnetic storms. The polarization jet at the ionospheric station Yakutsk was recorded in the dusk sector at the background of substorm disturbances when the geomagnetic index SME reached values from 1000 to ~3000 nT, and, according to data from the magnetic observatory Yakutsk (YAK), there was a positive bay ~50–100 nT in the geomagnetic field H component and ~100–200 nT in its Z component. We show that the lifetime of the polarization jet or narrow troughs in ionospheric plasma in the subauroral ionosphere during strong and long-term magnetic storms can be as long as 12 hrs.

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