Accounting for Variability in ULF Wave Radial Diffusion Models [PDF]
Journal of Geophysical Research: Space Physics, 2020 AbstractMany modern outer radiation belt models simulate the long‐time behavior of high‐energy electrons by solving a three‐dimensional Fokker‐Planck equation for the drift‐ and bounce‐averaged electron phase space density that includes radial, pitch‐angle, and energy diffusion.
R. L. Thompson +2 more
openaire +3 more sources
Post-noon two-minute period pulsating aurora and their relationship to the dayside convection pattern [PDF]
Annales Geophysicae, 1999 Poleward-moving auroral forms, as observed by meridian-scanning photometers, in the vicinity of the cusp region are generally assumed to be the optical signature of flux transfer events.
S. E. Milan +5 more
doaj +1 more source
ULF wave occurrence statistics in a high-latitude HF Doppler sounder [PDF]
Annales Geophysicae, 1999 Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates).
D. M. Wright, T. K. Yeoman, T. B. Jones
doaj +1 more source
Observations and modelling of the wave mode evolution of an impulse-driven 3 mHz ULF wave [PDF]
Annales Geophysicae, 2010 A combination of an HF Doppler sounder, a network of ground magnetometers, upstream solar wind monitors and a numerical model is used to examine the temporal evolution of an Ultra Low Frequency (ULF) wave.
J. D. Borderick +3 more
doaj +1 more source
Using ultra-low frequency waves and their characteristics to diagnose key physics of substorm onset [PDF]
, 2017 Substorm onset is marked in the ionosphere by the sudden brightening of an existing auroral arc or the creation of a new auroral arc. Also present is the formation of auroral beads, proposed to play a key role in the detonation of the substorm, as well ...
A Keiling +58 more
core +4 more sources
Global modeling of ULF waves at Mercury [PDF]
Geophysical Research Letters, 2015 AbstractULF waves in the ion cyclotron frequency range waves are regularly observed at Mercury's magnetosphere. Although previous statistical studies have shown that ULF waves are primarily compressional near the equator and transverse with linear polarization at higher latitude, the underlying reason for this distribution of wave polarization has not ...
Eun‐Hwa Kim +3 more
openaire +1 more source
Statistical Study of Electric Pc5 Pulsations in the Inner Magnetosphere Observed by Cluster
Geophysical Research LettersUltra‐low frequency (ULF) waves in the Pc5 band are essential for the transport of electrons in the radiation belt and the transport of energy from the solar wind into the magnetosphere.
Li Yan +5 more
doaj +1 more source
Polarization properties of standing shear Alfvén waves in non-axisymmetric background magnetic fields [PDF]
Annales Geophysicae, 2007 In this paper we present results concerning periods and polarizations of cold plasma ultra-low frequency (ULF) guided Alfvén waves in a non-axisymmetric geomagnetic field.
K. Kabin +4 more
doaj +1 more source
Revised time-of-flight calculations for high-latitude geomagnetic pulsations using a realistic magnetospheric magnetic field model [PDF]
, 2005 We present a simple time-of-flight analysis of Alfvén pulsations standing on closed terrestrial magnetic field lines. The technique employed in this study in order to calculate the characteristic period of such oscillations builds upon earlier time-of ...
Waters, C. L. +2 more
core +1 more source
Aspects of chiral pion-nucleon physics [PDF]
, 1996 The next-to-leading order chiral pion-nucleon Lagrangian contains seven finite low-energy constants. Two can be fixed from the nucleon anomalous magnetic moments and another one from the quark mass contribution to the neutron-proton mass splitting.
Bernard +33 more
core +3 more sources