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Effects of crystallographic properties on the ice nucleation properties of volcanic ash particles
Author(s) -
Kulkarni Gourihar,
Nandasiri Manjula,
Zelenyuk Alla,
Beranek Josef,
Madaan Nitesh,
Devaraj Arun,
Shutthanandan Vaithiyalingam,
Thevuthasan Suntharampillai,
Varga Tamas
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2015gl063270
Subject(s) - volcanic ash , ice nucleus , nucleation , mineralogy , materials science , particle (ecology) , deposition (geology) , volcano , chemical engineering , chemical composition , relative humidity , particle size , mineral , geology , chemistry , geochemistry , metallurgy , meteorology , geomorphology , physics , oceanography , organic chemistry , sediment , engineering
Abstract Specific chemical and physical properties of volcanic ash particles that could affect their ability to induce ice formation are poorly understood. In this study, the ice nucleating properties of size‐selected volcanic ash and mineral dust particles in relation to their surface chemistry and crystalline structure at temperatures ranging from −30 to −38°C were investigated in deposition mode. Ice nucleation efficiency of dust particles was higher compared to ash particles at all temperature and relative humidity conditions. Particle characterization analysis shows that surface elemental composition of ash and dust particles was similar; however, the structural properties of ash samples were different.