Long-lasting response of the global thermosphere and ionosphere to the 21 August 2017 solar eclipse

Sunday, August 5, 2018

Explains Wenbin Wang and others, previous studies have been devoted to examining the ionosphere and thermosphere response during the solar eclipse, but the post-eclipse response of the global ionosphere and thermosphere has not previously been well quantified.

Long-lasting response of the global thermosphere and ionosphere image
Global maps of differential TEC, neutral temperature, meridional winds (northward positive), and E×B vertical plasma drifts (upward positive) at pressure level 2 (~300 km) between the TIEGCM simulations with and without eclipse (with Eclipse - without Eclipse) at 06:00 UT on 22 August 2017, nine hours after the eclipse ended.

In this study, we investigate the post-eclipse response of the global ionosphere and thermosphere system to the recent Great American Solar Eclipse by using a high-resolution, global, coupled ionosphere-thermosphere-electrodynamics model. The global ionosphere and thermosphere underwent significant changes during the post-eclipse period. Specifically, the globally averaged ionospheric TEC perturbations can be larger than 0.2 TECU, and the globally averaged changes in neutral temperature and winds are greater than 2 K and 2 m/s even 9 hours after the eclipse ended. The changes in the global dynamic and energetic processes associated with the solar eclipse contribute to this long-lasting response of the ionosphere and thermosphere during the post-eclipse period.

Publication Name: Geophysical Research Letters

First HAO Author's Name: Wenbin Wang

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