Heterogeneous Ice Nucleation by Soufriere Hills Volcanic Ash Immersed in Water Droplets

Fine particles of ash emitted during volcanic eruptions may sporadically influence cloud properties on a regional or global scale as well as influencing the dynamics of volcanic clouds and the subsequent dispersion of volcanic aerosol and gases. It has been shown that volcanic ash can trigger ice nu...

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Veröffentlicht in:PloS one 2017-01, Vol.12 (1), p.e0169720-e0169720
Hauptverfasser: Mangan, T P, Atkinson, J D, Neuberg, J W, O'Sullivan, D, Wilson, T W, Whale, T F, Neve, L, Umo, N S, Malkin, T L, Murray, B J
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container_issue 1
container_start_page e0169720
container_title PloS one
container_volume 12
creator Mangan, T P
Atkinson, J D
Neuberg, J W
O'Sullivan, D
Wilson, T W
Whale, T F
Neve, L
Umo, N S
Malkin, T L
Murray, B J
description Fine particles of ash emitted during volcanic eruptions may sporadically influence cloud properties on a regional or global scale as well as influencing the dynamics of volcanic clouds and the subsequent dispersion of volcanic aerosol and gases. It has been shown that volcanic ash can trigger ice nucleation, but ash from relatively few volcanoes has been studied for its ice nucleating ability. In this study we quantify the efficiency with which ash from the Soufriere Hills volcano on Montserrat nucleates ice when immersed in supercooled water droplets. Using an ash sample from the 11th February 2010 eruption, we report ice nucleating efficiencies from 246 to 265 K. This wide range of temperatures was achieved using two separate droplet freezing instruments, one employing nanolitre droplets, the other using microlitre droplets. Soufriere Hills volcanic ash was significantly more efficient than all other ash samples that have been previously examined. At present the reasons for these differences are not understood, but may be related to mineralogy, amorphous content and surface chemistry.
doi_str_mv 10.1371/journal.pone.0169720
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subjects Atmospheric chemistry
Atmospheric nucleation
Biology and Life Sciences
Cloud properties
Clouds
Droplets
Earth Sciences
Ecology and Environmental Sciences
Freezing
Gases
Gases - chemistry
Hills
Ice
Ice accretion
Ice nucleation
Lava
Measurement
Measurement techniques
Mineralogy
Nucleation
Physical Sciences
Physics
Studies
Supercooled water
Surface chemistry
Temperature
Temperature range
Thermal properties
Volcanic activity
Volcanic aerosols
Volcanic ash
Volcanic Eruptions
Volcanic gases
Volcanoes
Water - chemistry
Water droplets
Water drops
title Heterogeneous Ice Nucleation by Soufriere Hills Volcanic Ash Immersed in Water Droplets
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