Variation in Plasmaspheric Hiss Wave Power With Plasma Density

David M. Malaspina, Jean Francois Ripoll, Xiangning Chu, George Hospodarsky, John Wygant

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Plasmaspheric hiss waves are commonly observed in the inner magnetosphere. These waves efficiently scatter electrons, facilitating their precipitation into the atmosphere. Predictive inner magnetosphere simulations often model hiss waves using parameterized empirical maps of observed hiss power. These maps nearly always include parameterization by magnetic L value. In this work, data from the Van Allen Probes are used to compare variation in hiss wave power with variation in both L value and cold plasma density. It is found that for L> 2.5, plasmaspheric hiss wave power increases with plasma density. For L> 3, this increase is stronger and occurs regardless of L value and for all local times. This result suggests that the current paradigm for parameterizing hiss wave power in many magnetospheric simulations may need to be revisited and that a new parameterization in terms of plasma density rather than L value should be explored.

Original languageEnglish (US)
Pages (from-to)9417-9426
Number of pages10
JournalGeophysical Research Letters
Issue number18
StatePublished - Sep 28 2018


  • Plasmaspheric hiss
  • Radiation belts
  • Wave models
  • inner magnetosphere

Fingerprint Dive into the research topics of 'Variation in Plasmaspheric Hiss Wave Power With Plasma Density'. Together they form a unique fingerprint.

Cite this