Magnetospheric Source and Electric Current System Associated With Intense SAIDs
Abstract
Subauroral Ion Drifts (SAIDs) are fast azimuthal plasma flows in the ionosphere. In this study, we use the Rice Convection Model to simulate an extremely intense SAID event which may trigger atmospheric emission phenomenon by specifying consecutive low‐entropy bubble injections. The results show strong SAID flow faster than ∼5,000 m/s that lasts longer than 100 min. Our model indicates that SAIDs map to the sharp inner edge of a strongly enhanced partial ring current, which connects to a Region‐2 downward field‐aligned current (FAC). The simulation predicts that the peak of the SAIDs, the center of the downward FAC, the subauroral boundary, the plasmapause, the inner edge of the proton and electron partial ring current, and the maximum azimuthal drift in the magnetosphere are pressed tightly within 0.5° latitude or 0.2 Re in the equatorial plane.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 18, 2021
- Source ID
- 10.1029/2021gl093253
Entities
People
- Dong Wei
- F. Toffoletto
- Fei Zhang
- Jian Yang
- Jun Cui
- R. A. Wolf
- Stanislav Sazykin
- Vassilis Angelopoulos
- Weiqin Sun
- Wenrui Wang
- Yukitoshi Nishimura
Organizations
- Air Force Office of Scientific Research
- Boston University
- Chinese Academy of Sciences
- National Aeronautics and Space Administration
- National Natural Science Foundation of China
- National Science Foundation
- Peking University Shenzhen Graduate School
- Rice University
- Southern University of Science and Technology
- Sun Yat-sen University
- University of California, Los Angeles