Alexander P. Khain is a Professor in the Institute of Earth Sciences at the Hebrew University of Jerusalem. He is a renowned leading expert in developing cloud resolving models with precise microphysics in order to investigate the physics of clouds and precipitation. He has participated in several American, European and Asian international research projects where his advanced microphysical schemes were widely used to investigate natural and anthropogenic aerosol effects and relations between microphysics and atmospheric dynamics. He has published two books on tropical cyclones and their interaction with the ocean, and around 200 academic papers on cloud physics, cloud-aerosol interaction, and numerical modeling of clouds, storms and hurricanes.