Effects Of Crystallographic Properties On The Ice Nucleation Properties Of Volcanic Ash Particles

Journal Article · Tue Apr 28 00:00:00 EDT 2015 · Geophysical Research Letters, 42(8):3048-3055

DOI:https://doi.org/10.1002/2015GL063270· OSTI ID:1182893

Kulkarni, Gourihar R.; Nandasiri, Manjula I.; Zelenyuk, Alla; Beranek, Josef; Madaan, Nitesh; Devaraj, Arun; Shutthanandan, V.; Thevuthasan, Suntharampillai; Varga, Tamas

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.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1182893
• Report Number(s): PNNL-SA-109130; 48658; KP1701000
• Journal Information: Geophysical Research Letters, 42(8):3048-3055, Journal Name: Geophysical Research Letters, 42(8):3048-3055
• Country of Publication: United States
• Language: English

Related Subjects

Ice Nucleation
volcanic ash
dust
ice clouds
Environmental Molecular Sciences Laboratory