Modeling

Thermospheric recovery during the 5 April 2010 geomagnetic storm

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

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

Impact of the lower thermospheric winter-to-summer residual circulation on thermospheric composition

TIE-GCM simulated effects
Monday, 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.

Ionospheric Climatology during Solar Minimum

median hmF2 comparison
Monday, 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.

Grand Challenge Research on Subauroral Polarization Streams

Joule heating of the ionosphere simulated by the NCAR TIE-GCM

A team from the NCAR High Altitude Observatory, Johns Hopkins University, and Rice University, led by HAO scientist Wenbin Wang, was awarded a prestigious NASA Heliophysics Grand Challenge Research Grant to study the magnetosphere-ionosphere interaction known as subauroral polarization streams.

Variability and predictability of the space environment as related to lower atmosphere forcing

Monthly mean, globally integrated total gravity wave flux of energy
Wednesday, May 31, 2017

Most of the large events affecting the thermosphere and ionosphere part of the space environment come from the Sun, the solar wind, and Earth’s magnetosphere.

Global temperature change

Global temperature change
Wednesday, May 31, 2017

The NCAR Whole Atmosphere Community Climate Model–eXtended (WACCM-X) was used to study global temperature change throughout the atmosphere during the last several decades.

WACCM-X simulation of tidal and planetary wave variability

Teleconnection pattern derived from WACCM-X simulations image
Wednesday, 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.

Global Modeling of Thermospheric Airglow in the Far-Ultraviolet

 Synthetic ultraviolet global images
Thursday, April 27, 2017

The Global Airglow (GLOW) model has been updated and extended to calculate ultraviolet light emitted by the upper atmosphere, including during the day, the night, and in the aurora.

The NASA Ionospheric Connection Explorer (ICON) Mission

Variation of NmF2 log 10 [1/cm3] for different seasons
Wednesday, April 26, 2017

The NASA Ionospheric Connection explorer (ICON) will study the coupling between the thermosphere and ionosphere at low- and mid-latitudes by measuring the key parameters.

A Study of Large Wind Shears Near the Mesopause and the Tropopause

Vertical profiles of maximum wind shear
Thursday, April 13, 2017

The NCAR Whole Atmosphere Community Climate Model (WACCM), with a quasi-uniform horizontal resolution of $\sim$25km and a vertical resolution of 0.1 scale height, produces large horizontal winds and vertical shears maximizing in the mesosphere and lower thermosphere (MLT), similar to those found

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