HAO Research Highlights

Magnetic field lines
September 16, 2021

The author reviews why, after almost 8 decades, we still have a coronal heating problem.

3D magnetic eld evolution of an erupting pseudostreamer
August 13, 2021

In this study, we present a magnetic conguration of an erupting pseudostreamer observed on April 19, 2015 on the Southwest limb embedding a prominence cavity. The eruption resulted in a relatively wide CME with a round front and prominence core intersected by a sharp plume.

migrating semidiurnal tide amplitude in zonal wind
August 13, 2021

Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (SD-WACCMX) simulations are used to investigate the solar migrating semidiurnal tide (SW2) around September equinox at middle to high latitudes in the Northern Hemisphere.

Geographic latitude and altitude distribution
August 13, 2021

This study presents a comprehensive comparison of the impact of solar activity on forecasting the upper atmosphere through assimilation of radio occultation (RO)-derived electron density (Ne) into a physics-based model (TIE-GCM) using an ensemble Kalman filter.

Histogram of small-scale GWs’ parameters observed by All-sky OH airglow imager at Resolute Bay Observatory
July 13, 2021

Observational datasets in the polar middle atmosphere are extremely valuable for understanding the polar dynamics and coupling between lower and middle atmosphere.