SA002-06
GOLD Observations of the Nighttime F-region Ionospheric Response to the Quasi-16-Day Wave Driving

Monday, 7 December 2020: 16:20
Virtual
Quan Gan1, Richard Eastes1, Alan Geoffrey Burns2, Wenbin Wang2, Liying Qian2, Mihail Codrescu3, Stanley C Solomon2 and William E McClintock1, (1)University of Colorado, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (2)NCAR, HAO, Boulder, CO, United States, (3)SWPC/NOAA, Boulder, CO, United States
Recorded Presentation
Abstract:
The GOLD Mission observed prominent quasi-16-day oscillations (Q16DOs) in the OI 135.6 nm nightglow from the equatorial ionization anomaly (EIA) region during Nov. 26, 2018 – Jan. 25, 2019, coincident with the enhanced quasi-16-day wave (Q16DW) activity observed in the middle atmosphere by TIMED/SABER. This implies that the F-region ionosphere couples with the lower atmosphere through large-scale waves. A noteworthy phenomenon was that the Q16DOs displayed an asymmetric behavior between the northern and southern EIA crests. This asymmetry indicates that the ionospheric Q16DOs might be driven by the Q16DW-modulated tides, which not only modulated the E-region dynamo winds but also modulated the F-region field-aligned neutral winds via vertical penetration, producing the oscillations in plasmas densities.
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