Search for periodicities of the solar irradiance data from the Earth Radiation Budget Satellite (ERBS) using the periodogram method

Abstract

We have analyzed the solar irradiance data from the Earth Radiation Budget Satellite (ERBS) during the time period from 1984 October 15 to 2003 October 15. By first filtering the data by Simple Exponential Smoothing, we have applied the periodogram method to the processed data in order to search for its time variation. The study exhibits multi-periodicities on these data around 110, 118, 574 and 740d with very high confidence levels (more than 99%). These periods are significantly similar to the periods of other solar activities which may suggest that solar irradiance may be associated with other solar activities. © 2010 National Astronomical Observatories of Chinese Academy of Sciences and IOP Publishing Ltd.