TIEGCM Model for 2020, 2021 now available

Model runs informed by HME product

Dr. Thomas Immel 0 235

TIEGCM model runs that incorporate the MIGHTI measurements of winds and temperatures are now available on the ICON FTP site. These are run using lower-boundary forcing from the ICON Hough Mode Extension 4.1 product. They are available from Jan 2020 to August 2021, with more to come following the continued production of the 4.1 product.

The zipped NetCDFs are available here.

The Documentation for the TIEGCM 2.0 model is available from the NCAR/HAO site.

Strong Winds Power Electric Fields in the Upper Atmosphere, NASA’s ICON Finds

Karin Hauck 0 232

[NASA Feature by Lina Tran on Nov 29 2021]

What happens on Earth doesn’t stay on Earth.

Using observations from NASA’s ICON mission, scientists presented the first direct measurements of Earth’s long-theorized dynamo on the edge of space: a wind-driven electrical generator that spans the globe 60-plus miles above our heads. The dynamo churns in the ionosphere, the electrically charged boundary between Earth and space. It’s powered by tidal winds in the upper atmosphere that are faster than most hurricanes and rise from the lower atmosphere, creating an electrical environment that can affect satellites and technology on Earth.

The new work, published [Nov 29 2021] in Nature Geoscience, improves our understanding of the ionosphere, which helps scientists better predict space weather and protect our technology from its effects.


ICON skin is based on Greytness by Adammer
Background image, courtesy of NASA, is a derivitave of photograph taken by D. Pettit from the ISS, used under Creative Commons license