The effects of ionospheric 'phase mixing' on a distributed driven shear Alfvén ulf pulsation'
Item
Title (Dublin Core)
The effects of ionospheric 'phase mixing' on a distributed driven shear Alfvén ulf pulsation'
Description (Dublin Core)
A numerical simulation study of the ultra-low
frequency (ULF) H-component magnetic field at the Earth's surface arising from a
perturbation ionospheric Hall current has been developed. The Hall current
system is driven by field-aligned currents (FACs) associated with shear Alfvén
field line resonances (FLRs) driven by fast mode global cavity oscillations. The
ionospheric phase mixing of the Hall current manifests itself in a number of
ways in the ground field, these are: (i) Smoothing the spectral maxima of the
ground signal: (ii) Loss in clarity of the harmonic structure of the spectra:
(iii) A small increase in the damping rate of the ULF wave at the resonance
latitude and (iv) small localised minimum in the spectra at the resonance
latitude.
frequency (ULF) H-component magnetic field at the Earth's surface arising from a
perturbation ionospheric Hall current has been developed. The Hall current
system is driven by field-aligned currents (FACs) associated with shear Alfvén
field line resonances (FLRs) driven by fast mode global cavity oscillations. The
ionospheric phase mixing of the Hall current manifests itself in a number of
ways in the ground field, these are: (i) Smoothing the spectral maxima of the
ground signal: (ii) Loss in clarity of the harmonic structure of the spectra:
(iii) A small increase in the damping rate of the ULF wave at the resonance
latitude and (iv) small localised minimum in the spectra at the resonance
latitude.
Creator (Dublin Core)
I. Krauklis
D. Orr
Subject (Dublin Core)
Science
Q
Physics
QC1-999
Geophysics. Cosmic physics
QC801-809
Publisher (Dublin Core)
Copernicus Publications
Date (Dublin Core)
1994-01-01T00:00:00Z
Type (Dublin Core)
article
Identifier (Dublin Core)
10.5194/angeo-12-188-1994
0992-7689
1432-0576
https://doaj.org/article/2f544fbfae81424fbfa8b95951f9238b
Source (Dublin Core)
Annales Geophysicae, Vol 12, Pp 188-194 (1994)
Language (Dublin Core)
EN
Relation (Dublin Core)
https://www.ann-geophys.net/12/188/1994/angeo-12-188-1994.pdf
https://doaj.org/toc/0992-7689
https://doaj.org/toc/1432-0576
Provenance (Dublin Core)
Journal Licence: CC BY