NDLI: Photochemistry of Ions at D-region Altitudes of the Ionosphere: A Review

Content Provider	Springer Nature Link
Author	Pavlov, A. V.
Copyright Year	2013
Abstract	The current state of knowledge of the D-region ion photochemistry is reviewed. Equations determining production rates of electrons and positive ions by photoionization of atmospheric neutral species are presented and briefly discussed. Considerable attention is given to the progress in the chemistry of O+(4S), O+(2D), O+(2P), N+, N2 +, O2 +, NO+, N4 +, O4 +, NO+(N2), NO+(CO2), NO+(CO2)2, NO+(H2O) n for n = 1–3, NO+(H2O)(N2), NO+(H2O)2(N2), NO+(H2O)(CO2), NO+(H2O)2(CO2), O2 +(H2O), H3O+(OH), H+(H2O) n for n = 1–8, O−, O2 −, O3 −, O4 −, OH−, CO3 −, CO4 −, NO2 −, NO3 −, ONOO−, Cl−, Cl−(H2O), Cl−(CO2), HCO3 −, CO3 −(H2O), CO3 −(H2O)2, NO3 −(H2O), NO3 −(H2O)2, OH−(H2O), and OH−(H2O)2 ions. The analysis of the D-region rocket ion mass spectrometer measurements shows that, among these ions, O2 +, NO+, NO+(H2O), and H+(H2O) n for n = 1–7 can make the main contribution to the total positive ion number density, and O−, O2 −, Cl−, OH−(H2O), CO3 −, HCO3 −, NO3 −, ONOO−, CO4 −, NO3 −(H2O), NO3 −(H2O)2, and 35Cl−(CO2) ions can be responsible for the main contribution to the total negative ion number density. Photodetachment of electrons from O−, Cl−, O2 −, O3 −, OH−, NO2 −, and NO3 −, dissociative electron photodetachment of O4 − and OH−(H2O), and photodissociation of O3 −, O4 −, CO3 −, CO4 −, ONOO−, HCO3 −, CO3 −(H2O), NO3 −(H2O), O2 +(H2O), O4 +, N4 +, NO+(H2O), NO+(H2O)2, H+(H2O) n for n = 2–4, NO+(N2), and NO+(CO2) are studied, and the photodetachment and photodissociation rate coefficients are calculated using the current state of knowledge on the cross sections of these processes and fluxes of solar radiation.
Starting Page	259
Ending Page	334
Page Count	76
File Format	PDF
ISSN	01693298
Journal	Surveys in Geophysics
Volume Number	35
Issue Number	2
e-ISSN	15730956
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-09-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ion photochemistry Ionosphere D-region Modeling and forecasting Geophysics/Geodesy Earth Sciences Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Geophysics Geochemistry and Petrology

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