Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 35, issue 3
Articles | Volume 35, issue 3
https://doi.org/10.5194/angeo-35-629-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-35-629-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 35, issue 3
Regular paper
 | 
10 May 2017
Regular paper |  | 10 May 2017

Geomagnetic activity and local time dependence of the distribution of ultra low-frequency wave power in azimuthal wavenumbers, m

Theodore E. Sarris and Xinlin Li

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Short summary
In this paper we describe a novel way to approximate the decomposition of magnetospheric ultra low-frequency (ULF) wave power in key azimuthal wavenumbers m, which is a parameter describing the number of azimuthal wavelengths that fit within a particle drift orbit. This is a critical parameter that is required in estimates of the rates of radial diffusion, and we show for the first time that there is a local time and geomagnetic activity dependence in the distribution of power in wavenumbers m.
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