Ca II K And H Spectral Line Profiles From “Basal” And “Magnetic” Chromospheres

We use observations from the SOLIS’ Integrated Sunlight Spectrometer (ISS) to investigate properties of the Ca II K and H disk-integrated spectral line profiles. The ISS daily observations cover the period of declining phase of cycle 23 and rising phase of cycle 24. The contributions of “basal” and “magnetic” chromospheres were extracted from the observed profiles in order to investigate their solar-cycle dependency. Our analysis suggests that the properties of the "basal" chromosphere may change slightly with the cycle of activity.