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Paper: Solar Cycle Variation of Chromospheric Radiation
Volume: 368, The Physics of Chromospheric Plasmas
Page: 481
Authors: Solanki, S.K.
Abstract: Radiation emitted by the Sunís chromospheric gas displays a significant cyclic variation. The magnitude of this variability and the shape of the light curve differs from that exhibited by photospheric radiation, or total solar irradiance. The amplitude of the cyclic variation of chromospheric radiation is larger and less affected by the contribution of sunspots. Consequently, the influence of small-scale magnetic features forming plage and the network dominates. Here a brief introduction is given to the solar cycle variation of chromospheric radiation, its connection with the magnetic field, its quantitative modeling and related questions, such as the solar cycle variability of the quiet Sun chromosphere and its cause. Finally, some thoughts on the possible secular change of chromospheric (and total) irradiance are presented.
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