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We investigate the variation in the mode parameters obtained from time seriesof length 9, 36, 72 and 108 days to understand the changes occurring ondifferent time-scales. The regression analysis between frequency shifts andactivity proxies indicates that the correlation and slopes are correlated andboth increase in going from time series of 9 to 108 days. We also observe thatthe energy of the mode is anti-correlated with solar activity while the rate atwhich the energy is supplied remains constant over the solar cycle.

Variation of Oscillation Mode Parameters over the Solar Cycle 23: An Analysis on Different Time Scales