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

• Main Authors: Verronen, P. T., Ulich, Th., Turunen, E., Rodger, C. J.
• Other Authors: Finnish Meteorological Institute (FMI), Sodankylä Geophysical Observatory, University of Oulu, Physics Department, University of Otago Dunedin, Nouvelle-Zélande
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2006
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; Kilpisjärvi; EISCAT
• Online Access: https://hal.science/hal-00317927; https://hal.science/hal-00317927/document; https://hal.science/hal-00317927/file/angeo-24-187-2006.pdf

International audience The solar proton event of October 1989 and especially the sunset of 23 October 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...