ion composition

Lee, J., & Angelopoulos, V. (2014). Observations and modeling of EMIC wave properties in the presence of multiple ion species as function of magnetic local time. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1002/2014JA020469 (Original work published November 2014)

Sarno-Smith, L., Liemohn, M., Katus, R., Skoug, R., Larsen, B., Thomsen, M., et al. (2015). Postmidnight depletion of the high-energy tail of the quiet plasmasphere. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1002/2014JA020682 (Original work published March 2015)

Yue, C., Bortnik, J., Li, W., Ma, Q., Gkioulidou, M., Reeves, G., et al. (2018). The composition of plasma inside geostationary orbit based on Van Allen Probes observations. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1029/2018JA025344 (Original work published July 2018)