HAO Research Highlights

TIE-GCM simulated effects
June 12, 2017

Plain Language Summary or Abstract: Gravity wave forcing near the mesopause drives a summer-to-winter residual circulation in the mesosphere and a reversed, lower thermospheric winter-to-summer residual circulation.

TIMED trajectory from SABER measurements (left column) and TIEGCM simulations
June 12, 2017

Thermospheric temperature and density recovery during the 5 April 2010 geomagnetic storm has been investigated in this study.

Comparing the evolution of the daily hemispheric sunspot number and a data-inspired representation of activity band polarity and migration image
June 9, 2017

We present observational signatures of solar cycle 25 onset. Those signatures are visibly following a migratory path from high to low latitudes.

median hmF2 comparison
June 5, 2017

In order to calculate the Earth’s whole atmosphere and ionosphere coupled system in a self-consistent way, new ionosphere and electrodynamo modules have been implemented in the thermosphere and ionosphere eXtension of WACCM-X. WACCX-X stands for the Whole Atmosphere Community Climate Model.

Teleconnection pattern derived from WACCM-X simulations image
May 31, 2017

This book chapter describes the basic physical processes in the thermosphere, or Earth's neutral upper atmosphere, which need to be captured in a physics-based model. Liu, H., 2014: WACCM-X simulation of tidal and planetary wave variability in the upper atmosphere.