Sunset transition of negative charge in the D-region ionosphere during high-ionization conditions

• Published in: Annales Geophysicae
• Main Authors: Verronen, P. T., Ulich, Th., Turunen, E., Rodger, C. J.
• Format: Text
• Language: English
• Published: 2018
• Subjects: Kilpisjärvi; EISCAT
• Online Access: https://doi.org/10.5194/angeo-24-187-2006; https://angeo.copernicus.org/articles/24/187/2006/

The solar proton event of October 1989 and especially the sunset of 23October is examined in this study of negative ion chemistry, which combines measurements of nitric oxide, electron density, and cosmic radio noise absorption with ion and neutral chemistry modelling. Model results show that the ne...