Document Type

Data

Publication Date

1-26-2026

Abstract

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.

Comments

Additional data is forthcoming. 

This material is based on work supported by the National Center of Meteorology, Abu Dhabi, UAE under the UAE255 Research Program for Rain Enhancement Science (UAEREP). J.S. was supported in the summer of 2025 through a fellowship from the Michigan Space Grant Consortium.

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Research Data Deposit_Simmons.pdf (155 kB)
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