Negative ions in the auroral mesosphere during a PCA event around sunset

• Published in: Annales Geophysicae
• Main Authors: C. F. del Pozo, E. Turunen, T. Ulich
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 1999
• Subjects: Science; Q; Physics; QC1-999; Geophysics. Cosmic physics; QC801-809; Tromsø; Sodankylä; EISCAT
• Online Access: https://doi.org/10.1007/s00585-999-0782-1; https://doaj.org/article/0fccd20ce76744b0bdbc3b087b8ec5ac

This is a study of the negative ion chemistry in the mesosphere above Tromsø using a number of EISCAT observations of high energy proton precipitation events during the last solar maximum, and in particular around sunset on 23 October, 1989. In these conditions it is possible to look at the relative...