VARIABILITY OF THE SOLAR CHROMOSPHERIC NETWORK OVER THE SOLAR-CYCLE

From a large sample of the Kodaikanal spectroheliograms in the CaII K line we have studied the variations in the intensity of the network elements over two solar cycles and have estimated their contribution to the overall variability seen in the disc-averaged K line profiles. The relative contribution of the network elements and the bright points to the K-emission are of the order of 25% and 15% respectively. We have shown that the area of the network elements is anti-correlated with the solar activity, and it increases by about 24% during the solar minimum compared to the maximum period.