فهرست نشریات علمی دسترسی آزاد ایران

Interpretations of cosmic ray intensity reflect various solar activities, particularly influenced by changes in solar wind plasma within the heliosphere. To investigate the periodic behavior and relationship of cosmic ray intensity with sunspot number, solar wind plasma velocity, solar wind temperature, and interplanetary magnetic field (IMF), we employed daily and annual data analysis of solar activity from September 1986 to December 2019. In analyzing the relationship between cosmic ray intensity (CRI) and solar activity, the statistical method of "cross-correlation", although widely employed in various disciplines and applications, has been a staple for investigating such relationships. The primary goal of the cross-correlation method is to study the relationship between CRI and solar activity parameters and apply this information in statistical analyses across various solar cycles or periods. In this study, calculations for the most recent solar activity cycles are provided. The analysis confirms a negative correlation between the intensity of cosmic rays and the number of sunspots, with solar wind parameters exhibiting an anachronistic phase relationship also showing a negative correlation. Furthermore, the anti-correlation of cosmic ray intensity with solar wind parameters is expected to yield insights into space weather near Earth.