Atmospheric Sciences

Sebastian Käser

Sebastian Käser is a PhD student at ETH Zürich in Switzerland. Since his master degree in robotics, he as been passionate about building flying stuff. He customized drones for humanitarian use cases and worked on reusable radiosondes. In his PhD he builds a Lagrangian balloon platform for cloud observations and investigates microphysical processes in mixed-phase clouds.

CLOUDLAB: Cloud research in a natural laboratory

Anna Trosits and Sebastian Käser March 31, 2026

It’s murky grey, windy, and freezing when we head out into the countryside of the Swiss pre-Alps. We are looking for low hanging clouds to serve as our natural laboratory. Wintertime low stratus clouds can cover Switzerland for days. This type of cloud is stable with temperatures below 0 ºC and it contains plenty of …[Read More]