A statistical analysis and comparison of the fine structures of the ion upflow associated with the double-peak subauroral ion drift

Frontiers in Astronomy and Space Sciences

Astronomy and Space Sciences

Q.-H. Zhang¹  Yong Wang¹  Zan-Yang Xing¹  Yu-Zhang Ma¹  Shang-Chun Teng²  De-Sheng Han²  Zhi-Wei Wang²  Qiang Zhang² 

[1] Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China;State Key Laboratory of Marine Geology, School of Ocean and Earth Science, Tongji University, Shanghai, China;

关键词: subauroral polarization streams;    subauroral ion drift;    double-peak subauroral ion drift;    ion upflow;    frictional heating;   

DOI  :  10.3389/fspas.2023.1254243

 received in 2023-07-06, accepted in 2023-09-18,  发布年份 2023

来源: Frontiers

【 摘 要 】

The ion upflow associated with the subauroral ion drift (SAID) is a crucial component in the exchange of particles between the ionosphere and the ring currents. The ion upflow associated with the double-peak subauroral ion drift (DSAID), which is a subclass of the SAID, is more complex compared to SAID. In this study, we conducted a statistical analysis of the ion upflow associated with DSAID using Defense Meteorological Satellite Program (DMSP) F16–F18 data spanning 11 years (2010–2020) in the Northern Hemisphere. Our findings revealed that ion upflow associated with DSAID can exhibit either a double-peak or a one-peak upflow. The statistical characteristics of these two types of events displayed significant differences. In DSAID with a double-peak upflow event, the velocity of DSAID around the high-latitude peak was greater than that around the low-latitude peak. However, in DSAID with a one-peak upflow event, the DSAID velocities around the two peaks were very similar. Based on the formation mechanism of DSAID and the process of frictional heating in the ionosphere, we proposed that the formation of DSAID with a double-peak upflow and DSAID with a one-peak upflow are likely related to the formation process of DSAID.

【 授权许可】

Unknown   
Copyright © 2023 Zhang, Han, Teng, Wang, Zhang, Xing, Wang and Ma.