Other
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa41c..05l&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA41C-05
Other
[2415] Ionosphere / Equatorial Ionosphere, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2487] Ionosphere / Wave Propagation, [3389] Atmospheric Processes / Tides And Planetary Waves
Scientific paper
This study will examine two possible mechansims through which the lower atmosphere can affect the ionospheric variability at low latitudes: namely tidal variability due to its interation with quasi-stationary planetary waves (Liu et al., 2010), and secondary generation of gravity waves excited by the body forcing from dissipation of primary gravity waves from the lower atmosphere (Liu and Vadas, 2010). The former may be most significant during stratospheric sudden warming events when the quasi-stationary planetary waves become large, as evidenced by recent observations. Because the amplitudes of the propagating tides and the tidal variability are usually strongest in the ionospheric E-region, we will focus on the modification of E-region dynamo. The latter, on the other hand, can introduce large wind perturbations in both E and F regions. Depending on the local time, the wind dynamo in the E or/and F regions are affected. The impacts on the ionospheric plasma drifts and plasma transport can extend after local-midnight.
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