Aerosols substantially influence microphysical processes within thunderclouds, potentially altering lightning flash rates and electrical characteristics. This research analyzed Cloud-to-Ground (CG) lightning data from the Indian Lightning Location Network (ILLN) for Maharashtra state (Western India) over the period 2014-2023. The seasonal proportion of positive CG lightning events and the underlying mechanisms contributing to their increased frequency have been investigated. The analysis revealed that the percentage of positive CG lightning peaked at approximately 40 % during the Indian Summer Monsoon (ISM) season and the post-monsoon period. These peaks coincided with elevated dust aerosol concentrations in the study area, which were associated with long-range transport of dust aerosols from the Arabian Desert and adjoining areas during the ISM. The high humidity during this period leads to a lower estimated cloud base height compared to the pre-monsoon season, likely facilitating the influx of abundant dust aerosols into thunderclouds. These dust particles act as efficient ice nuclei (IN), alter cloud microphysics, and enhance charge separation processes within thunderclouds. Positive CG lightning showed a significant upward trend, increasing by 141 % (2.41-fold rise) from 2014 to 2023, with an average annual rise of 4312 flashes during the ISM. Additionally, an increasing trend in Dust Aerosol Optical Thickness (AOT) and Ice Cloud Optical Thickness (ICOT) during the ISM emphasized the potential link between desert dust influx and the rise in positive CG lightning activity, suggesting a role for dust particles in ice formation within thunderclouds. The correlation between ICOT and positive CG lightning further confirmed that increased dust concentrations likely contributed to the rise in positive CG lightning activity. We propose that elevated dust concentrations near the cloud base promote ice crystal accumulation, fostering the development of a positive charge region in the lower portion of the mixed-phase region through a non-inductive charging mechanism. This environment likely contributes to the formation of tripole thunderclouds, characterized by a distinct lower positive charge region, commonly referred to as Inverted Polarity thunderclouds.