z-logo
Premium
Numerical simulation of the 6 day wave effects on the ionosphere: Dynamo modulation
Author(s) -
Gan Quan,
Wang Wenbing,
Yue Jia,
Liu Hanli,
Chang Loren C.,
Zhang Shaodong,
Burns Alan,
Du Jian
Publication year - 2016
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2016ja022907
Subject(s) - thermosphere , dynamo , ionosphere , physics , atmospheric sciences , atmospheric tide , geophysics , oscillation (cell signaling) , wavenumber , magnetic field , optics , quantum mechanics , biology , genetics
The Thermosphere‐Ionosphere‐Mesosphere Electrodynamics General Circulation Model (TIME‐GCM) is used to theoretically study the 6 day wave effects on the ionosphere. By introducing a 6 day perturbation with zonal wave number 1 at the model lower boundary, the TIME‐GCM reasonably reproduces the 6 day wave in temperature and horizontal winds in the mesosphere and lower thermosphere region during the vernal equinox. The E region wind dynamo exhibits a prominent 6 day oscillation that is directly modulated by the 6 day wave. Meanwhile, significant local time variability (diurnal and semidiurnal) is also seen in wind dynamo as a result of altered tides due to the nonlinear interaction between the 6 day wave and migrating tides. More importantly, the perturbations in the E region neutral winds (both the 6 day oscillation and tidal‐induced short‐term variability) modulate the polarization electric fields, thus leading to the perturbations in vertical ion drifts and ionospheric F 2 region peak electron density ( N m F 2 ). Our modeling work shows that the 6 day wave couples with the ionosphere via both the direct neutral wind modulation and the interaction with atmospheric tides.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here