Modeling

Space Weather Challenge & Forecasting Implications Of Rossby Waves

Graph depicting solar magnetic weather
Tuesday, March 31, 2020

Rossby waves arise in thin layers within fluid regions of stars and planets. These global wave-like patterns occur due to the variation in Coriolis forces with latitude. In the past several years observational evidence has indicated that there are also Rossby waves in the Sun.

Large-scale ionospheric disturbances during the 17 March 2015 storm: A model-data comparative study

Graphic image of publication figure
Tuesday, March 24, 2020

Storm-induced ionospheric density variations are a major concern of near-Earth space environment as they could drastically disrupt satellite navigation and telecommunication systems.

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.

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