Numerical simulations of three-dimensional E-region ion trajectories in realistic tidal wind and E-field structures: layer formation and transport

Details Numerical simulations of three-dimensional E-region ion trajectories in realistic tidal wind and E-field structures: layer formation and transport Numerical simulations of three-dimensional E-region ion trajectories in realistic tidal wind and E-field structures: layer formation and transport

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jastp..63.1519m&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 63, Issue 14, p. 1519-1528.

Physics

4

Scientific paper

We utilise numerical simulations to study three-dimensional (3-D) single ion motion in the ionospheric E-region as described by the classical windshear theory and under the influence of both tidal winds and external DC E-fields. The tidal winds are modelled such that layers occur at typical times and altitudes as observed at Arecibo and in the absence of E-fields. Our simulation approach here (Paper I) is used to find the vertical-and ultimately horizontal (Paper II; Mathews et al., /2001)-ion convergence zones and thus to study the formation of ion layers. The simulation approach utilises a space/time random release of thousands of individual test ions into the upper E-region source zone and then a statistical study of the evolving ion distribution throughout the 3-D E-region as a function of time. Additionally this approach is extended to derive what a narrow-beam (1-D) incoherent scatter radar would ``see'' in the presence of a given ion space-time distribution. This Monte Carlo method for deriving the ``radar-view'' of the ionosphere as a function of time is particularly powerful when the ion distribution is very complex due to introduction of /~10-100km horizontal scale E-fields. This application will be explored in detail in the companion paper (Paper II).

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