scholarly journals Correlation between thermodynamic anomalies and pathways of ice nucleation in supercooled water

2014 ◽  
Vol 140 (16) ◽  
pp. 164503 ◽  
Author(s):  
Rakesh S. Singh ◽  
Biman Bagchi
Keyword(s):  
Supercooled Water ◽  
Ice Nucleation ◽  
Thermodynamic Anomalies

scholarly journals Comment on evidence for surface-initiated homogenous nucleation

2003 ◽  
Vol 3 (4) ◽  
pp. 3361-3372 ◽  
Author(s):  
J. E. Kay ◽  
V. Tsemekhman ◽  
B. Larson ◽  
M. Baker ◽  
B. Swanson
Keyword(s):  
Laboratory Experiments ◽  
Drop Size ◽  
Supercooled Water ◽  
Ice Nucleation ◽  
Surface Nucleation ◽  
Embryo Formation ◽  
Homogenous Nucleation ◽  
Atmospheric Data ◽  
Water Drops

Abstract. We investigate theoretical, laboratory, and atmospheric evidence for a recently proposed hypothesis: homogenous ice nucleation occurs at the surface, not in the volume, of supercooled water drops. Using existing thermodynamic arguments, laboratory experiments, and atmospheric data, we conclude that ice embryo formation at the surface cannot be confirmed or disregarded. Ice nucleation rates measured as a function of drop size in an air ambient could help distinguish between volume and surface nucleation rates.

scholarly journals Comment on evidence for surface-initiated homogeneous nucleation

2003 ◽  
Vol 3 (5) ◽  
pp. 1439-1443 ◽  
Author(s):  
J. E. Kay ◽  
V. Tsemekhman ◽  
B. Larson ◽  
M. Baker ◽  
B. Swanson
Keyword(s):  
Homogeneous Nucleation ◽  
Laboratory Experiments ◽  
Drop Size ◽  
Supercooled Water ◽  
Ice Nucleation ◽  
Surface Nucleation ◽  
Embryo Formation ◽  
Atmospheric Data ◽  
Water Drops

Abstract. We investigate theoretical, laboratory, and atmospheric evidence for a recently proposed hypothesis: homogeneous ice nucleation initiates at the surface, not in the volume, of supercooled water drops. Using existing thermodynamic arguments, laboratory experiments, and atmospheric data, we conclude that ice embryo formation at the surface cannot be confirmed or disregarded. Ice nucleation rates measured as a function of drop size in an air ambient could help distinguish between volume and surface nucleation rates.

Suppression of ice nucleation in supercooled water under temperature gradients

2020 ◽  
Author(s):  
Li-Ping Wang ◽  
Wei-Liang Kong ◽  
Pei-Xiang Bian ◽  
Fu-Xin Wang ◽  
Hong Liu
Keyword(s):  
Supercooled Water ◽  
Ice Nucleation ◽  
Temperature Gradients

Ice Nucleation and Growth in Supercooled Water Films Condensed on a Hydrophobic Surface

Nature ◽  
1964 ◽  
Vol 203 (4952) ◽  
pp. 1343-1345 ◽  
Author(s):  
HENRY M. PAPÉE ◽  
ALBERTO C. MONTEFINALE ◽  
T. W. ZAWIDZKI
Keyword(s):  
Supercooled Water ◽  
Hydrophobic Surface ◽  
Nucleation And Growth ◽  
Ice Nucleation ◽  
Water Films

A microfluidic apparatus for the study of ice nucleation in supercooled water drops

Lab on a Chip ◽  
2009 ◽  
Vol 9 (16) ◽  
pp. 2293 ◽  
Author(s):  
Claudiu A. Stan ◽  
Grégory F. Schneider ◽  
Sergey S. Shevkoplyas ◽  
Michinao Hashimoto ◽  
Mihai Ibanescu ◽  
...  
Keyword(s):  
Supercooled Water ◽  
Ice Nucleation ◽  
Water Drops

scholarly journals Temperature-gradient effects on heterogeneous ice nucleation from supercooled water

AIP Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 125122
Author(s):  
Liping Wang ◽  
Weiliang Kong ◽  
Fuxin Wang ◽  
Hong Liu
Keyword(s):  
Temperature Gradient ◽  
Supercooled Water ◽  
Ice Nucleation ◽  
Gradient Effects ◽  
Heterogeneous Ice Nucleation

scholarly journals Is Ice Nucleation from Supercooled Water Insensitive to Surface Roughness?

2015 ◽  
Vol 119 (2) ◽  
pp. 1164-1169 ◽  
Author(s):  
James M. Campbell ◽  
Fiona C. Meldrum ◽  
Hugo K. Christenson
Keyword(s):  
Surface Roughness ◽  
Supercooled Water ◽  
Ice Nucleation

scholarly journals A technique for quantifying heterogeneous ice nucleation in microlitre supercooled water droplets

2015 ◽  
Vol 8 (6) ◽  
pp. 2437-2447 ◽  
Author(s):  
T. F. Whale ◽  
B. J. Murray ◽  
D. O'Sullivan ◽  
T. W. Wilson ◽  
N. S. Umo ◽  
...  
Keyword(s):  
High Temperature ◽  
Silver Iodide ◽  
Cloud Condensation Nuclei ◽  
Aerosol Particles ◽  
Supercooled Water ◽  
Ice Nucleation ◽  
Large Droplet ◽  
Increasing Temperature ◽  
Detection And Quantification ◽  
Heterogeneous Ice Nucleation

Abstract. In many clouds, the formation of ice requires the presence of particles capable of nucleating ice. Ice-nucleating particles (INPs) are rare in comparison to cloud condensation nuclei. However, the fact that only a small fraction of aerosol particles can nucleate ice means that detection and quantification of INPs is challenging. This is particularly true at temperatures above about −20 °C since the population of particles capable of serving as INPs decreases dramatically with increasing temperature. In this paper, we describe an experimental technique in which droplets of microlitre volume containing ice-nucleating material are cooled down at a controlled rate and their freezing temperatures recorded. The advantage of using large droplet volumes is that the surface area per droplet is vastly larger than in experiments focused on single aerosol particles or cloud-sized droplets. This increases the probability of observing the effect of less common, but important, high-temperature INPs and therefore allows the quantification of their ice nucleation efficiency. The potential artefacts which could influence data from this experiment, and other similar experiments, are mitigated and discussed. Experimentally determined heterogeneous ice nucleation efficiencies for K-feldspar (microcline), kaolinite, chlorite, NX-illite, Snomax® and silver iodide are presented.

scholarly journals Modelling the effect of condensed-phase diffusion on the homogeneous nucleation of ice in supercooled water

2019 ◽  
Author(s):  
Kathryn Fowler ◽  
Paul Connolly ◽  
David Topping
Keyword(s):  
Low Temperature ◽  
Aerosol Particle ◽  
Condensed Phase ◽  
Homogeneous Nucleation ◽  
Supercooled Water ◽  
Organic Aerosol ◽  
Ice Nucleation ◽  
Cirrus Clouds ◽  
Climate Modelling ◽  
Phase Diffusion

Abstract. In-situ studies of low temperature cirrus clouds have found unexpectedly low ice crystal numbers and consistently high supersaturations, which suggest that our understanding of the freezing mechanisms under these conditions are incomplete. Computational models typically use homogeneous nucleation to predict the ice nucleated in supercooled water. However, the existence of ultra-viscous organic aerosol in the upper troposphere has offered alternative ice nucleation pathways, which have been observed in laboratory studies. The possible effects of aerosol viscosity on cloud micro-physical properties have traditionally been interpreted from simple model simulations of an individual aerosol particle based on equilibration timescales. In this study, to gain insight into the formation of ice in low temperature cirrus clouds, we have developed the first cloud parcel model with bin micro-physics to simulate condensed phase diffusion through each individual aerosol particle. Our findings demonstrate, for the first time, the complex relationship between the rate of ice formation and the viscosity of secondary organic aerosol, driven by two competing effects – which cannot be explained using existing modelling approaches. The first is inhibition of homogeneous ice nucleation below 200 K, due to restricted particle growth and low water volume. The second occurs at temperatures between 200 K and 220 K, where water molecules are slightly more mobile and a layer of water condenses on the outside of the particle, causing an increase in the number of frozen aerosol particles. Our new model provides a basis to better understand and simulate cirrus cloud formation on a larger scale, addressing a major source of uncertainty in climate modelling through the representation of cloud processes.

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