HAO Research Highlights

Graphic depicting migrating diurnal tidal amplitudes
December 16, 2020

The migrating diurnal tide (DW1) is one of the dominant wave motions in the mesosphere and lower thermosphere. It plays a crucial role in neutral atmosphere and ionosphere coupling. The DW1 can vary over a range of time scales from days to years.

Graphic image depicting effective diffusion coefficient
December 16, 2020

Han-Li Liu has observed that atmospheric gravity waves may transport heat and chemical species in the vertical direction.

Graphic depicting wind shear
December 16, 2020

Large wind shears around the mesopause region play an important role in atmospheric neutral dynamics and ionospheric electrodynamics.

Graphic image involving the radiance of GOLD Channel B
December 8, 2020

The Global-scale Observation of Limb and Disk (GOLD) mission, for the first time, provides synoptic two-dimensional (2D) maps of OI 135.6 nm observations.

Graphic images from CHAMP satellite
December 2, 2020

First author, William Lotko, reveals that the CHAMP satellite orbiting near 400 km altitude near the magnetic cusp routinely traversed thermospheric density enhancements (up to 50%) that are not predicted by empirical models.

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