Primary Biological Aerosol Particles (PBAP) and secondary biological aerosols formed from biogenic VOCs can play an important role in the atmosphere, including influence on atmospheric chemistry, precipitation, climate, and public health. PBAP from biological origins include both living and dead fragments where oceans also act as a potential source including cells and their fragments produced from dissolved organic molecules and compounds. Secondary biogenic aerosols are formed from biogenic volatile gases in gas-to-particle conversion having potential effects on climate.

We aim to address open questions and summarize new findings concerning PBAP and biogenic aerosols including research on laboratory and field-based observations, theoretical and modeling studies that focus on presenting new knowledge from regional to global scale. We also welcome the development and inclusion of PBAP and secondary biogenic aerosols in chemistry modules in models, and improved identification methods such as application of machine learning statistical techniques to novel chemical analysis.