Atmospheric aerosols of biological origin are ubiquitous in the Earth’s atmosphere and play an important role in Erath’s climate and ecosystem health. These bioaerosols mainly include airborne bacteria, fungal spores, pollens, plant and animal fragments, etc. These bioaerosols are essential for reproduction and spread of organisms across various ecosystems by means of air dispersal. During dispersal, however, they can cause or enhance human, plant, and animal diseases. Moreover, they can also serve as nuclei for cloud droplets and ice crystal thus affecting the hydrological cycle. The abundance, diversity, and implications of bioserosols on climate and ecosystem health, however, is not well characterized and leaves a wide gap in the scientific understanding of their interactions with climate and ecosystem.

Over the Indian region, which has a diverse land-use pattern and experiences the contrasting synoptic scale weather phenomenon by means of Southwest and Northeast monsoon, the characteristic source properties of bioaerosols and their impact on climate and human health exhibit manifold implications. I will present the novel bioaerosol measurements carried out over Indian region at contrasting locations during distinct seasons using advanced state-of-the-art techniques.