Effects of Plasma Density on the Spatial and Temporal Scale Sizes of Plasmaspheric Hiss

Shuai Zhang, I. Jonathan Rae, Kaijun Liu*, Clare E. J. Watt, Quanqi Shi, Anmin Tian, Alexander W. Degeling, Ruilong Guo, Mengmeng Wang, Xiao Chen Shen, Fei Yao, Jing Chun Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The effects of plasma density on the plasmaspheric hiss amplitude and its spatial and temporal scale sizes are investigated using data from Van Allen Probes A and B. The plasmaspheric hiss amplitude and scale sizes are found to be more affected by the small-scale density variations than the overall density profile of the plasmasphere. In detail, our results suggest that both the hiss wave amplitude and its scale sizes are (a) related to the total electron density when the density is less than ∼1,000 cm−3; (b) independent of the total electron density when the density is greater than ∼1,000 cm−3; and (c) better correlated with the detrended density (removing the background plasmasphere density profile from the total electron density) regardless of the density value.

Original languageEnglish
Article numbere2023JA031955
Number of pages12
JournalJournal of Geophysical Research: Space Physics
Issue number3
Early online date22 Mar 2024
Publication statusPublished - Mar 2024

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