Atmospheric ionization refers to the process of adding or removing charged particles in the air. It occurs when molecules or atoms in the atmosphere gain or lose electrons, becoming positively or negatively charged ions. Full definition
This is also why global warming alarmists try to do their best to quench anything related to the the solar variability → cosmic ray flux → atmospheric ionization → low altitude cloud cover link which by now has ample evidence for support, both empirical and experimental. (sciencebits.com)
Large changes in atmospheric ionization induced by sporadic SEP events may potentially also affect radio wave propagation in the Venusian atmosphere. (swsc-journal.org)
Thus, it is plausible that changes to atmospheric ionization rates due to cosmic ray variability may affect the occurrence of electrical phenomena in the Venusian atmosphere (Nordheim et al. 2015) hence manifesting a relation between space weather and meteorological phenomena. (swsc-journal.org)