التفاصيل البيبلوغرافية
| العنوان: |
A Statistical Analysis of the Auroral Streamer Current System. |
| المؤلفون: |
Aryan, Homayon, Weygand, James Michael, Bortnik, Jacob, Chu, Xiangning, Cao, Xin, Tian, Sheng |
| المصدر: |
Journal of Geophysical Research. Space Physics; Nov2023, Vol. 128 Issue 11, p1-10, 10p |
| مصطلحات موضوعية: |
AURORAS, STATISTICS, MAGNETIC fields, CURRENT sheets, MEDIAN (Mathematics), ZODIAC, MOMENTUM transfer |
| الشركة/الكيان: |
GOES (Meteorological satellite) |
| مستخلص: |
Magnetosphere‐ionosphere coupling is an important process that involves the transport of vast quantities of mass, energy, and momentum in the Earth's near‐space environment. This transport involves extended, global sheets of electrical current that flows along the magnetic field lines. Many studies have discussed the magnetosphere‐ionosphere coupling between the fast‐moving earthward flows and the north‐south oriented streamers in the ionosphere. However, only recently, the temporal evolution of the ionospheric current pattern, from the start to the end of the streamer, has been investigated through case studies, by combining the ionospheric current pattern with the magnetotail fast‐moving earthward flows. In this study, we show the statistical spatial and temporal evolution of the ionospheric current pattern associated with north‐south oriented streamers using simultaneous THEMIS (Time History of Events and Macroscale Interaction during Substorms) observations of fast‐moving earthward flows within the magnetotail, Geostationary Operational Environmental Satellite observations, auroral all‐sky images, and ionospheric equivalent current maps derived from ground magnetometer measurements. We show that the streamer related ionospheric field‐aligned currents (FACs) are statistically almost equivalent in magnitude for the 38 events that were analyzed. Results show that the streamer related ionospheric FACs are statistically approximately similar in magnitude for 38 events. The duration of these events ranges from 2 to 21 min with a median value of 9 min. Key Points: We show statistically the spatial and temporal development of the ionospheric current pattern associated with north‐south oriented streamerWe focus on nonsubstorm event activities with simultaneous THEMIS, spherical elementary currents, all‐sky imager, and Geostationary Operational Environmental Satellite measurementsStreamer related ionospheric field‐aligned currents are statistically approximately similar in magnitude for 38 events [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
