Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa31a..03y&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SA31A-03
Physics
2162 Solar Cycle Variations (7536), 2423 Ionization Mechanisms, 2479 Solar Radiation And Cosmic Ray Effects
Scientific paper
The recent measurements of the solar extreme ultraviolet (EUV) irradiance by the TIMED Solar EUV Experiment (SEE) have allowed us to re-examine the ionization frequencies for part of decreasing phase of the solar cycle 23. In the past, ionization frequencies for various species (CO2, O, O2, N2) have been calculated based on limited observations from satellites and rockets and their solar cycle dependence was parameterized from discrete sets of measurements. We compare the ionization frequencies obtained from TIMED/SEE to those presently in use in the community. We also examine the time evolution of these frequencies on several time scales - solar cycle and solar rotational variability as well as short-term flare activity. The relationship of these ionization frequencies to different solar indices will also be discussed.
Eparvier Francis
Solomon Stanley C.
Talaat Elsayed R.
Woods Thomas
Yee J.
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