Modeling

Global-scale observations and modeling of far-ultraviolet airglow

Image depicting measurement, model simulation, and normalized differences
Monday, December 16, 2019

The NASA Global-scale Observations of the Limb and Disk (GOLD) instrument is an ultraviolet imager and spectrograph that observes light from the upper-atmosphere of the Earth, in order to infer quantities such as the composition and temperature of the thermosphere.

Global-scale Observations of the Equatorial Ionization Anomaly

GOLD image of the daytime airglow and the equatorial ionization anomaly (EIA)
Monday, August 5, 2019

The NASA Global-scale Observations of the Limb and Disk (GOLD) ultraviolet spectrograph began imaging the Equatorial Ionization Anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator, in October 2018.

Predictability of the mesosphere and lower thermosphere based on initialized hindcast experiments

Graph depicting global normalized root mean square error for wavenumbers 0-6
Monday, July 15, 2019

The ability to predict conditions in Earth’s ionosphere and thermosphere is of increasing societal relevance due to the growing dependence on, for example, satellite based communications and navigation (e.g., GPS) systems.

HAO Eclipse Expedition to Cerro Tololo, Chile

MHD models to predict the magnetic structure of the corona at the time of the eclipse

Following its long history of solar eclipse field expeditions, the High Altitude Observatory currently has a team deployed in Cerro Tololo, Chile to conduct solar physics research.

Quantifying Gravity Wave Forcing Using Scale Invariance

Graph depicting Gravity Wave Forcing
Thursday, June 13, 2019

Despite the increasing resolution, forcing on the mean circulation by resolved waves in general circulation models is not yet converging. Parameterization of the forcing remains a major source of model uncertainty.

WACCM-X Publication One of The Top Downloaded

Image of certificate of congratulations for JAMES article

The Journal of Advances in Modeling Earth Systems (JAMES), presented HAO authors, with a certificate of achievement for their WACCM-X paper receiving the most downloads in the 12 months following it's online publication.

MHD simulation of prominence-cavity system

Images of 3D field lines
Thursday, May 9, 2019

We present magnetohydrodynamic simulation of the evolution from quasi-equilibrium to onset of eruption of a twisted, prominence-forming coronal magnetic flux rope underlying a corona streamer. The flux rope is built up by an imposed flux emergence at the lower boundary.

Whole Atmosphere Climate Change: Dependence on Solar Activity

Graph of global simulations
Thursday, May 9, 2019

Solomon and colleagues conducted global simulations of temperature change due to emissions of trace gases due to human activity, that extended from the surface, throughout the atmosphere, to space.

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