Sodankylä Ion Chemistry Model
Esa Turunen, Helena Matveinen and Thomas Ulich
Geophysical Observatory, FIN-99600 Sodankylä, Finland
Abstract
Sodankylä Ion Chemistry (SIC) model is a detailed ion-chemical scheme of
the D region, in a conceptually simple model. It was originally built to be
a tool for interpretation of D-region incoherent scatter experiments and
cosmic radio noise absorption measurements, both of which form the basis of
D-region research done at Sodankylä Geophysical Observatory. The number of
different ions in the current version is 55, of which 36 are positive and
19 are negative. The model solves for ion and electron concentrations in the
ionospheric D and lower E regions either as a steady state model or a time
dependent model assuming a predescribed neutral atmosphere. Applications of
the model have been case studies to determine NO concentration, neutral
temperature, and negative ion properties in incoherent scatter and heating
experiments. The model was also used to invert measured electron density
profiles to parameters of the precipitating electron spectra.
For further information, please go to our new SIC Model homepage.