Primary Biological Aerosol Particles (PBAPs) or bioaerosols are ubiquitous in the atmosphere and play significant roles in climate and ecosystem health. They can act as Giant Cloud Condensation Nuclei (GCCN) or Ice Nuclei (IN) and affect the cloud processing and hydrological cycle. Bioaerosols also pose a virulent impact on living organisms by jeopardizing food security, endangering wildlife and acting as infectious allergens to human beings. With the increasing attention on these roles played by PBAPs, various conventional and advanced techniques such as optical microscopy, chemical tracer analysis, SEM analysis, DNA extraction and analysis, etc. have been deployed in the past few decades to characterize the physical, chemical and biological properties of atmospheric bioaerosols. In the last few years, online measurement techniques using Laser (Light) Induced Fluorescence (LIF) instruments based on the intrinsic auto-fluorescence property of bioaerosols have unveiled the era of real-time bioaerosol measurements. However, these studies are in paucity in the Indian subcontinent which is known for the unique climatic conditions, species richness and diverse land use pattern. With this background, the research problem is formulated to investigate the inter-relationship between bioaerosols, hydrological cycle and ecosystem health in the Indian tropical region in the present scenario of climate change. A study will be carried out to investigate the role of meteorological parameters in the release of IN forming and pathogenic bioaerosols and deploy advanced online measurement using an Ultraviolet Aerodynamic Particle Sizer (UV-APS) for the measurements of bioaerosols in high time and size resolution at contrasting environment and distinct seasons. This will be complimented with advanced offline measurements to examine the morphological features and diversity of bioaerosols up to species level. Thus instigating a comprehensive bioaerosol study in the Indian subcontinent.