Modeling

Global Modeling of Equatorial Spread F with SAMI3/WACCM-X

Graphic image of the comparison of 135.6 nm emissions
Tuesday, June 2, 2020

We report the first results of a global ionosphere/thermosphere simulation study that self-consistently generates large-scale equatorial spread F (ESF) plasma bubbles in the post-sunset ionosphere.

Simulated trends in ionosphere-thermosphere climate due to predicted main magnetic field changes from 2015 to 2065

Photograph of TEC in 2015
Friday, May 15, 2020

Summary or Abstract: The strength and structure of the Earth's magnetic field is gradually changing. These changes do not only affect the difference between the geographic and magnetic pole, which we have to consider when we hike in higher latitude regions.

A distinct magnetic property of the inner penumbral boundary III. Analysis of simulated sunspots

Graphic image depicting radial profiles of continuum intensity
Friday, May 8, 2020

The analyses of sunspot observations revealed a fundamental magnetic property of the umbral boundary, the invariance of the vertical component of the magnetic field.

Yeimy Rivera

Yeimy Rivera is a visiting scientist in the High Altitude Observatory (HAO) at the National Center for Atmospheric Research (NCAR). She is completing her PhD program at the University of Michigan under the advisement of Dr. Enrico Landi and Dr. Susan Lepri.

Wenjun Dong

Wenjun is a visiting scientist in the High Altitude Observatory (HAO) at the National Center for Atmospheric Research (NCAR). His research focus is the theoretical, numerical, and interpretive studies of the dynamics and structures of the Earth's middle and upper atmosphere.

Xuguang Cai

Xugang Cai is a postdoctoral fellow II in the High Altitude Observatory at NCAR. He is working on the investigation of the thermosphere and ionosphere by GOLD satellite and numerical models (TIEGCM).

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.

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