Effects of a Realistic O+ Source on Modeling the Ring Current

被引：4

作者：

Menz, A. M. ^{[1
]}

Kistler, L. M. ^{[1
]}

Mouikis, C. G. ^{[1
]}

Spence, H. E. ^{[1
]}

Henderson, M. G. ^{[2
]}

机构：

[1] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA

[2] Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2019年 / 124卷 / 12期

基金：

欧盟地平线“2020”;

关键词：

ION COMPOSITION; INNER MAGNETOSPHERE; CONVECTION; STORM;

D O I：

10.1029/2019JA026859

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use the UNH-IMEF electric field model to simulate the convection of O+ from the near-earth plasma sheet into the ring current during the 17 March 2015 storm. Using Van Allen Probes data from the night side apogee, we reconstruct a realistic O+ source. Modeling this storm using the UNH-IMEF electric field and a dipole magnetic field has previously been found to have good agreement. Using the realistic source along with drift times and charge exchange loss from these results, we model an inbound pass near the peak of the storm where O+ is increasingly dominant over H+. We find that the time-varying realistic O+ source is necessary to reproduce the observed spectral features and the O+ pressure enhancements at low L-shells, while our previous results showed that the H+ was able to be modeled sufficiently with a simple, unchanging boundary condition. Further, our results show that adiabatic convective transport of O+ from the near-earth plasma sheet (L similar to 6) can explain the observed ring current enhancements.

引用

页码：9953 / 9962

页数：10