Effects of interplanetary transient disturbances on cosmic ray intensity in relation with solar wind plasma parameters

Abstract

Two types of interplanetary disturbances namely magnetic cloud events (MCE's) and bidirectional events (BDE's) are taken to study the short term change in solar wind plasma components as well as in cosmic ray intensity. These two types of disturbances are again separated into two categories : (i) coronal hole associated events (MCE's & BDE's), and (ii) without coronal hole associated events (MCE's & BDE's). Analysis of this research work indicates distinctly different effects on solar wind plasma velocity and cosmic ray intensity. Coronal holes associated BDE's are found significantly responsible for enhanced plasma velocity. Both disturances in either of the category produce short-term decrease in cosmic ray intensity.