Datasets for Response of a liquid water cloud to in situ hygroscopic seeding

We have performed experiments in the Michigan Tech Pi Chamber to assess the response of a steady-state, liquid water cloud to in situ injection of a hygroscopic powder. Three materials were tested: jet-milled NaCl, a newly developed NaCl-TiO2 core-shell material, and Arizona test dust as a non-hygroscopic control. Injection of the hygroscopic materials resulted in an increase of the local liquid water content, stimulating formation of droplets up to 60 microns in diameter. Upon injection of the powders, the pre-existing cloud in the chamber collapsed.