Institute of Meteorology and Climate Research

Heterogenous Ice Nucleation

cloud_types_atmopshere
Atmospheric layers and typical cloud types

How aerosol particles act as nuclei for ice and other crystalline phases like hydrates, and how this can quantitatively be described in models, are among the major open questions in atmospheric cloud and climate research. From an ice-microphysical perspective, atmospheric clouds may be subdivided into the following classes, according to their cloud top temperature or region of occurence:

Except the warm clouds which involve only the gaseous and liquid water phases, these clouds are influenced by a variety of ice nucleation modes induced by soluble and insoluble aerosol particles of different origin and nature.

Instruments

Instruments to measure INPs and to quantify their ice nucleation efficiency
INSEKT CC-BY-SA 4.0
freezing assay INSEKT
PINE CC-BY-SA 4.0 KIT IMK-AAF
mobile cloud chamber PINE