HAO Research Highlights

High S4 occurrence (> 0.2) longitudinal and annual variations from 2010 to 2013
July 13, 2021

A correlation study is performed to investigate possible connections between the stratospheric gravity waves and the ionospheric plasma bubble induced GPS signal scintillations.

Daily average WACCMX+DART NO profiles
July 13, 2021

The energetic particle precipitation (EPP) indirect effect (IE) refers to the downward transport of reactive odd nitrogen (NOx=NO+NO2) produced by EPP (EPP-NOx) from the polar winter mesosphere and lower thermosphere to the stratosphere where it can destroy ozone.

Difference between zonal wind field and prior ensemble
July 9, 2021

The thermospheric data assimilation is limited due to the lack of continuous observation of the neutral state.

Data/Model Comparison
June 30, 2021

The NASA Ionosphere Connection explorer was launched in October 2019 with the goal of understanding the transition from Earth's atmosphere to space by measuring key quantities at low latitudes.

Snapshots during splitting of a 6-degree toroidal ring into two
June 30, 2021

We explore the fundamental physics of narrow toroidal rings during their nonlinear magnetohydrodynamic evolution at tachocline depths. Using a shallow-water model, we simulate the nonlinear evolution of spot-producing toroidal rings of 6-degree latitudinal width and peak field of 15 kG.