HAO Research Highlights

The time evolution of height-dependent (a) electron density, (b) ionization rate, (c) Pedersen conductivity, and (d) Hall conductivity at MLT = 6 and magnetic latitude of 60
June 18, 2018

Stan Solomon et al, dicuss a new modeling capability that self-consistently couples physics-based magnetospheric 18 electron precipitation with its impact on the ionosphere, representing a significant improvement over previous models.

Change in WACCMX simulated total electron content (TEC) during a geomagnetic
June 18, 2018

Nicholas Pedatella notes that geomagnetic storms are an important driver of variability in Earth’s ionosphere, and can have significant societal impacts through the ionosphere’s impact on communications and navigation systems (e.g., GPS).

responses at 120 km due to different lower boundary forcing of the TIEGCM
May 11, 2018

New mechanisms for imposing planetary-wave (PW) variability on the ionosphere thermosphere system are discovered in numerical experiments conducted with the National Center for Atmospheric Research (NCAR) Thermosphere-Ionosphere- Electrodynamics General circulation Model (TIE-GCM).

the solar spectrum
May 4, 2018

A short guide to spectroscopy is given, with emphasis upon the elementary physics needed to understand and begin modeling the radiation emerging from astrophysical plasmas using the Sun as a guide, without bias towards a particular region of the Sun's atmosphere.

UT and altitude variations of electron densities
May 4, 2018

The high-resolution thermosphere-ionosphere-electrodynamics general circulation model (TIEGCM) was used to investigate the cause of F2-region electron density (Ne) responses to the Great American Solar Eclipse on 21 August 2017 at Millstone Hill (42.610N, 71.480W).