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Seasonal and solar cycle variation of E ‐region nitric oxide
Author(s) -
Golshan N.,
Sechrist C. F.
Publication year - 1975
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs010i003p00305
Subject(s) - thermosphere , atmospheric sciences , seasonality , nitric oxide , variation (astronomy) , photoelectric effect , electron density , environmental science , ionosphere , physics , electron , astrophysics , chemistry , optics , astronomy , mathematics , statistics , organic chemistry , quantum mechanics
Measured electron density and [NO + ]/[O 2 + ] data are used to deduce the seasonal and solar activity variation of E ‐region nitric oxide concentration. The results imply a strong dependence of [NO] on soft X rays leading to the possibility that dissociation of N 2 by energetic photoelectrons is a major source of N( 2 D ). Seasonal variations of the thermosphere apparently cause enhanced [NO] in summer in agreement with the summer enhancement of experimental [NO + ]/[O 2 + ].