Abstract:
The association of Lomnický Štít data of coronal green line irradiance (CI) to photospheric magnetic activity is studied for the years 1975-1994 using the Carrington rotation averaged photospheric magnetic flux data. It is found that the CI correlates well with photospheric magnetic flux of active regions and the total disk-integrated magnetic flux on longer time scales (11-year solar cycle) and fails (about 50% of the time) to show a strong dependence on shorter time scales. A comparison of the association of CI and of the 10.7cm radio flux with the photospheric magnetic flux data indicated that the CI might basically represent the background coronal irradiance.
