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

Share this story:
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

Organizations:

People: