Freezing-nucleation in aqueous solutions of clathrate forming gases
Reischel, Michael T.
- Publisher: Tellus B
(issn: 1600-0889, eissn: 0280-6509)
Experiments were performed to determine the extent to which the nucleating abilities of artificialand natural freezing nuclei are influenced by the presence of clathrate-forming gases dissolved inwater. Changes in the supercooling requirement of water saturated with argon, or propane weredetermined for several nucleant-gas combinations using the drop freezing technique. Thenucleants responded differently indicating that the influence of these clathrate-forming gases onheterogeneous freezing nucleation is not due to changes in the bulk water structure, but resultsfrom modifications at the nucleant-embryo interface. The measurements revealed an irreversibleimprovement in nucleating ability for some combinations and demonstrated that these gases canreduce the supercooling requirement of certain nuclei by as much as 3°C.DOI: 10.1111/j.1600-0889.1984.tb00229.x